Terminal device, network device and method

Abstract

FIELD OF THE DISCLOSURE The embodiments of the present disclosure relate to communication. According to the embodiments of the present disclosure, a network device transmits at least one configuration associated with a precoding matrix to a terminal device. The network device also transmits downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH) to the terminal device. The DCI includes an indication of a precoding matrix index. The terminal device determines a precoding matrix based on the at least one configuration and the indication. The terminal device transmits a PUSCH based on the precoding matrix. In this way, a precoding matrix can be appropriately selected.

Description

[Technical Field]

[0001] TECHNICAL FIELD Embodiments of the present disclosure relate generally to the field of telecommunications, and more particularly to communication methods, apparatus, and computer-readable media. [Background technology]

[0002] Several technologies have been proposed to improve communication performance. For example, multiple input multiple output (MIMO) has been proposed. MIMO includes a feature that facilitates the use of multiple antenna elements at a base station for both sub-6 GHz and above-6 GHz frequency bands. In this case, array and diversity gains, rather than capacity gains, can be achieved using multiple antennas at the transmitter and / or receiver. In this case, the same symbols weighted by a complex-valued scale factor are transmitted from each transmit antenna so that the input covariance matrix has unit rank. This scheme is called beamforming. When a receiver has multiple antennas, single-layer beamforming cannot simultaneously maximize the signal power at each receive antenna. Therefore, to maximize the throughput of a multi-antenna system, precoding is used for multi-layer beamforming. Precoding is a generalized beamforming scheme that supports multi-layer transmission in MIMO systems. By using precoding, multiple streams are transmitted from the transmit antennas independently with appropriate weighting for each antenna to maximize the throughput at the receiver output. Summary of the Invention [Problem to be solved by the invention]

[0003] Overall, the exemplary embodiments of the present disclosure provide a solution for communications. [Means for solving the problem]

[0004] In a first aspect, a communications method is provided, the method including: receiving, from a network device, at least one configuration associated with a precoding matrix; receiving, from the network device, downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH), the DCI including an indication of a precoding matrix index; determining a precoding matrix based on the at least one configuration and the indication; and transmitting the PUSCH based on the precoding matrix.

[0005] In a second aspect, a communication method is provided, the method including: transmitting, to a terminal device, at least one configuration associated with a precoding matrix; transmitting downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH), the DCI including an indication of a precoding matrix index; and receiving the PUSCH based on the precoding matrix.

[0006] In a third aspect, a terminal device is provided, the terminal device comprising: a processing unit; and a memory, coupled to the processing unit, storing instructions that, when executed by the processing unit, cause the terminal device to perform operations including receiving, from a network device, at least one configuration associated with a precoding matrix, receiving, from the network device, downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH), the DCI including an indication of a precoding matrix index, determining a precoding matrix based on the at least one configuration and the indication, and transmitting the PUSCH based on the precoding matrix.

[0007] In a fourth aspect, a source network device is provided, the source network device comprising: a processing unit; and a memory coupled to the processing unit and storing instructions, which, when executed by the processing unit, cause the source network device to perform operations including: sending, to a terminal device, at least one configuration associated with a precoding matrix; sending downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH), the DCI including an indication of a precoding matrix index; and receiving the PUSCH based on the precoding matrix.

[0008] In a fifth aspect, there is provided a computer readable medium storing instructions that, when executed on at least one processor, cause the at least one processor to perform a method according to the first, second or third aspect.

[0009] Other features of the present disclosure will be readily apparent from the following description. [Brief explanation of the drawings]

[0010] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description of some exemplary embodiments of the present disclosure in the accompanying drawings.

[0011] [Figure 1] FIG. 1 is a schematic diagram of a communication environment in which embodiments of the present disclosure can be implemented.

[0012] [Figure 2] FIG. 1 illustrates a signaling flow for handover in accordance with some embodiments of the present disclosure.

[0013] [Figure 3] 1 is a flowchart of an exemplary method according to an embodiment of the present disclosure.

[0014] [Figure 4] 1 is a flowchart of an exemplary method according to an embodiment of the present disclosure.

[0015] [Figure 5] FIG. 1 is a schematic block diagram of an apparatus suitable for implementing embodiments of the present disclosure.

[0016] In the drawings, the same or similar reference numbers represent the same or similar elements. DETAILED DESCRIPTION OF THE INVENTION

[0017] The principles of the present disclosure will now be described with reference to some exemplary embodiments. It should be understood that these embodiments are provided for illustrative purposes only to aid those skilled in the art in understanding and practicing the present disclosure, and do not imply any limitation on the scope of the present disclosure. The disclosure described herein can be implemented in various ways different from those described below.

[0018] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains.

[0019] As used herein, the term "network device" refers to a device capable of providing or hosting a cell or coverage area in which a terminal device can communicate. Examples of network devices include, but are not limited to, a Node B (Node B or NB), an evolved Node B (eNode B or eNB), a New Radio Access Node B (gNB), a Remote Radio Unit (RRU), a Radio Head (RH), a Remote Radio Head (RRH), a low-power node such as a femto node or a pico node, a satellite network device, an aircraft network device, etc. For illustrative purposes, some exemplary embodiments will be described below with reference to an eNB as an example of a network device.

[0020] As used herein, the term "terminal device" refers to any device with wireless or wired communication capabilities. Examples of terminal devices include, but are not limited to, user equipment (UE), personal computers, desktop computers, mobile phones, cellular phones, smartphones, personal digital assistants (PDAs), portable computers, tablets, wearable devices, Internet of Things (IoT) devices, any Internet of Things (IoE) device, machine-type communication (MTC) devices, in-vehicle devices for V2X communications, etc., where the "X" in V2X represents a pedestrian, vehicle, or infrastructure / network, or an image capture device such as a digital camera, a gaming device, a music storage and playback device, or an internet appliance that enables wireless or wired internet access and browsing. In the following description, the terms "terminal device," "communication device," "terminal," "user equipment," and "UE" may be used interchangeably.

[0021] In one embodiment, a terminal device can connect to a first network device and a second network device. One of the first network device and the second network device may be a master node and the other a secondary node. The first network device and the second network device may use different radio access technologies (RATs). In one embodiment, the first network device may be a first RAT device, and the second network device may be a second RAT device. In one embodiment, the first RAT device is an eNB, and the second RAT device is a gNB. Information related to the different RATs may be transmitted to the terminal device from at least one of the first network device and the second network device. In one embodiment, the first information may be transmitted from the first network device to the terminal device, and the second information may be transmitted from the second network device directly or via the first network device to the terminal device. In one embodiment, information related to the terminal device configuration configured by the second network device may be transmitted from the second network device via the first network device. The information regarding the reconfiguration of the terminal device configured by the second network device may be transmitted to the terminal device directly from the second network device or via the first network device.

[0022] Communications described herein may conform to any suitable standard, including, but not limited to, New Radio Access (NR), Long Term Evolution (LTE), LTE-Evolution, LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), cdma2000, and Global System for Mobile Communications (GSM). Furthermore, communications may be performed in accordance with any currently known or future-developed generation of communications protocols. Examples of communications protocols include, but are not limited to, first-generation (1G), second-generation (2G), 2.5G, 2.85G, third-generation (3G), fourth-generation (4G), 4.5G, fifth-generation (5G), and sixth-generation (6G) communications protocols. The techniques described herein may be used for the wireless networks and radio technologies mentioned above, as well as other wireless networks and radio technologies.

[0023] As used herein, the term "circuitry" may refer to a hardware circuit and / or a combination of a hardware circuit and software. For example, a circuit may be a combination of analog and / or digital hardware circuitry and software / firmware. As yet another example, a circuit may be any portion of a hardware processor with software, including a digital signal processor, software, and one or more memories, that cooperate to cause a device, such as a terminal device or a network device, to perform various functions. In yet another example, a circuit may be a hardware circuit and / or a processor, such as a microprocessor or portion thereof, that requires software / firmware for operation, although the software may not be present if not necessary for operation. As used herein, the term "circuitry" also includes an implementation of a hardware circuit or one or more processors only, or a hardware circuit or portion of one or more processors and its / their accompanying software and / or firmware.

[0024] As used herein, the singular forms "a," "an," and "said" include the plural forms unless the context clearly indicates otherwise. The term "comprises" and variations thereof should be understood as open-ended terms meaning "including, but not limited to." The term "based on" should be understood as "based at least in part on." The terms "one embodiment" and "embodiment" should be understood as "at least one embodiment." The term "another embodiment" should be understood as "at least one other embodiment." Terms such as "first," "second," etc. may refer to different or the same object. The following may include other explicit and implicit definitions.

[0025] In some instances, values, procedures, or devices are referred to as "best," "lowest," "highest," "minimum," "maximum," etc. It should be understood that such descriptions are intended to illustrate that choices may be made from among many functional alternatives used, and that such choices are not necessarily better, smaller, higher, or otherwise more preferred than other choices.

[0026] In the following, the terms "transmission opportunity," "reception opportunity," "repeat," "transmission," "reception," "PDSCH transmission opportunity," "PDSCH repeat," "PUSCH transmission opportunity," "PUSCH repeat," "PUCCH opportunity," "PUCCH repeat," "repeat transmission," "repeat reception," "PDSCH transmission," "PDSCH reception," "PUSCH transmission," "PUSCH reception," "PUCCH transmission," "PUCCH reception," "RS transmission," "RS reception," "communication," "transmission," and "reception" may be used interchangeably. The terms "TCI state," "set of QCL parameters," "QCL parameters," "QCL assumption," and "QCL setting" may be used interchangeably. The terms "TCI field," "TCI state field," and "transmission setting indication" may be used interchangeably. The terms "transmission opportunity," "transmission," "repeat," "reception," "reception opportunity," "monitoring opportunity," "PDCCH monitoring opportunity," "PDCCH transmission opportunity," "PDCCH transmission," "PDCCH candidate," "PDCCH reception opportunity," "PDCCH reception," "search space," "CORESET," "multiple chances," and "PDCCH repetition" may be used interchangeably. Hereinafter, the terms "PDCCH repetition," "repeated PDCCH," "repeated PDCCH signal," "PDCCH candidate configured for the same scheduling," "PDCCH," "PDCCH candidate," and "linked PDCCH candidate" may be used interchangeably. The terms "DCI" and "DCI format" may be used interchangeably. In some embodiments, embodiments of the present disclosure may be applied to PDSCH and PUSCH scheduling, and hereinafter, PDSCH scheduling will be described as an example. For example, embodiments of the present disclosure may be applied to PUSCH by replacing "transmit" with "receive" and / or "receive" with "transmit." The terms "PDSCH" and "PUSCH" may be used interchangeably. The terms "transmit" and "receive" may be used interchangeably.The terms "common beam," "common beam update / indication," "integrated TCI state," "integrated TCI state update / indication," "beam indication," "TCI state indication," "TCI_state_r17," "tci_StateId_r17," "TCI_state_r17 indicating integrated TCI state," "TCI state shared / applied for all or a subset of CORESET on PDSCH and UE-dedicated reception," "Rel-17 TCI state," "TCI state with tci_StateId_r17," "TCI state configured for TCI state update in integrated TCI framework," "TCI state indicated in DCI for common beam update / indication," and "TCI state indicated in DCI and applicable to all / subset of CORESET and PDSCH" may be used interchangeably. The terms "subset of CORESET," "subset of TCI states," "subset of integrated TCI states," "subset of downlink (integrated) TCI states," and "subset of combined (integrated) TCI states" may be used interchangeably. The terms "subset of PUCCH," "subset of TCI states," "subset of combined TCI states," "subset of uplink (combined) TCI states," and "subset of combined (combined) TCI states" may be used interchangeably. The terms "precoding matrix," "precoding," "beam," "beamforming," and "precoder" may be used interchangeably.

[0027] As mentioned above, precoding is a generalized beamforming method that supports multi-layer transmission in MIMO systems. Precoding is a technique that utilizes transmit diversity by weighting information streams; that is, the transmitter transmits coded information to the receiver to achieve prior knowledge of the channel. By using precoding, multiple streams are transmitted from the transmit antennas independently with appropriate weighting for each antenna to maximize throughput at the receiver output. The terms "precoding matrix" and "precoder" may be used interchangeably below. It is also possible to enable uplink transmission with eight antenna ports to support more than four layers.

[0028] According to prior art, for uplink (UL) codebooks, a UE may support one, two, or four antenna ports. For single carrier frequency division multiple access (SC-FDMA) and OFDM, there may be fully coherent, partially coherent, or non-coherent (antenna selection) codebooks. For codebook-based UL transmission, the rank indicator (RI) and precoding matrix indicator (PMI) are jointly coded, and different layer numbers (RI values) may be indicated in the same table / field. For non-codebook-based UL transmission, the RI and SRS resource indication are jointly coded. For both codebook-based and non-codebook-based UL transmissions, the number of demodulation reference signal (DMRS) ports is determined based on the number of layers, and the antenna port field (DMRS port) indicates only the DMRS port index.

[0029] However, the 8-port transmission is unknown for layers 1 to 3, which affects the signaling and codebook design. The target device may require a different type of transmission scheme / codebook. For customer premises equipment / fixed wireless (CPE / FWA) devices, the channel may change slowly. For example, if the channel conditions are suitable for more than four layers, the CSI is stable within a certain time interval. For vehicles, the channel may be time-varying and may not be suitable for more than four layers. Vehicles do not require transmissions for more than four layers. Furthermore, the 8-transmission codebook appears to include full / partial / noncoherent precoders. For a fully coherent precoder, the DL codebook can be reused, but there is an 8-port codebook for two or more antenna structures. For a partial coherent / noncoherent precoder (antenna selection), freely selecting N ports from the eight ports increases the codebook size. Alternatively, the network may only indicate the required transmission precoding matrix (TPMI) without indicating the antenna structure. The codebook size may be very large to cover different structures / a large number of antenna selection precoders, which significantly increases the DCI payload. In fact, some precoders may never be indicated for a given terminal device. Additionally, at least for more than four layers, a second set of modulation schemes (MCS), new data indicator (NDI), and redundancy version (RV) fields are required. Reusing the RI, PMI, and DMRS indications may result in a large and unnecessary DCI payload.

[0030] To solve at least part of the above problems, a solution for determining an uplink matrix has been proposed. According to an embodiment of the present disclosure, a network device transmits at least one configuration associated with a precoding matrix to a terminal device. The network device also transmits downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH) to the terminal device. The DCI includes an indication of a precoding matrix index. The terminal device determines a precoding matrix based on the at least one configuration and the indication. The terminal device transmits the PUSCH based on the precoding matrix. In this way, it is possible to appropriately select a precoding matrix.

[0031] 1 is a schematic diagram of a communication system in which embodiments of the present disclosure can be implemented. Communication system 100, which is part of a communication network, includes terminal devices 110-1, 110-2, ..., 110-N, which may be collectively referred to as "terminal devices 110." The number N may be any suitable integer.

[0032] Communication system 100 further includes network device 120, which may be any suitable network device in some embodiments, and in which network device 120 and terminal device 110 can communicate data and control information with each other.

[0033] Communications in communication system 100 may be achieved according to any suitable communications protocol, including, but not limited to, cellular communications protocols such as first generation (1G), second generation (2G), third generation (3G), fourth generation (4G), fifth generation (5G), and sixth generation (6G), wireless local area network communications protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11, and / or any other protocols now known or developed in the future. Furthermore, communications may utilize any suitable wireless communications technology, including, but not limited to, code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), frequency division duplexing (FDD), time division duplexing (TDD), multiple input multiple output (MIMO), orthogonal frequency division multiple access (OFDMA), and / or any other technology now known or developed in the future.

[0034] Embodiments of the present disclosure may be applied to any suitable scenario. For example, embodiments of the present disclosure may be implemented on a reduced-capability NR device. Alternatively, embodiments of the present disclosure may be implemented within one of NR multiple-input multiple-output (MIMO), NR sidelink enhancements, NR systems at frequencies higher than 52.6 GHz, enhanced NR operation up to 71 GHz, Narrowband Internet of Things (NB-IOT) / enhanced Machine Type Communications (eMTC) over Non-Terrestrial Networks (NTN), NTN, UE power saving enhancements, NR coverage enhancements, NB-IOT and LTE-MTC, integrated access and backhaul (IAB), NR multicast and broadcast services, or multi-radio dual connectivity enhancements.

[0035] As used herein, the term "slot" refers to a dynamic scheduling unit. A slot includes a predetermined number of symbols. For example, the number of symbols in a slot may be 11 or 14. The term "subslot" may refer to multiple symbols. For example, the number of symbols in a subslot may be 1, 2, 4, 7, or 14. A subslot may include fewer symbols than a slot. As used herein, a slot may refer to both a regular slot including a predetermined number of symbols and a subslot including fewer symbols than the predetermined number of symbols.

[0036]

[0023] Embodiments of the present disclosure are described in detail below. Reference is first made to Figure 2, which illustrates a signaling diagram illustrating a process 200 between devices according to some exemplary embodiments of the present disclosure. For illustrative purposes only, process 200 will be described with reference to Figure 1. Process 200 may involve terminal device 110-1 and network device 120 shown in Figure 1.

[0037] In some embodiments, the network device 120 may transmit control information to the terminal device 110-1 (2010). The information may indicate that the PUSCH is scheduled to be associated with eight antenna ports. For example, the total number of antenna ports for PUSCH transmission may be eight. Alternatively, the information may indicate that the PUSCH is scheduled to be associated with a sounding reference signal (SRS) having eight antenna ports. In other words, the total number of antenna ports for the SRS associated with the PUSCH transmission is eight. In some embodiments, the information may be transmitted within an SRS configuration.

[0038] In some embodiments, the terminal device 110-1 may be configured or indicated to have a layer number (i.e., represented as v_ri) for PUSCH transmission. For example, the layer number v_ri may be at least one of {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the terminal device 110-1 may be configured or indicated to have a precoding matrix for PUSCH transmission. In some embodiments, the size of the precoding matrix may be 8*v_ri or v_ri*8. In some embodiments, there may be v_ri columns or rows in the precoding matrix. In some embodiments, there may be 8 elements in a column or row of the precoding matrix, and the index of the element may be represented as idx, where idx may be a non-negative integer. For example, 0≦idx≦7. For another example, 1≦idx≦8.

[0039] For example, there may be one set of precoding matrices for an 8-transmitting (TX) uplink transmission or for a PUSCH transmission associated with an 8-port SRS. In some embodiments, the set of precoding matrices may include one or more fully coherent precoding matrices. Alternatively or additionally, the set of precoding matrices may include one or more partially coherent precoding matrices. Alternatively or additionally, the set of precoding matrices may include one or more non-coherent precoding matrices. Alternatively or additionally, the set of precoding matrices may include one or more mixed partially coherent and non-coherent precoding matrices. In some embodiments, the set of precoding matrices may include one or more partially coherent precoding matrices. Alternatively or additionally, the set of precoding matrices may include one or more mixed partially coherent and non-coherent precoding matrices. Alternatively or additionally, the set of precoding matrices may include one or more non-coherent precoding matrices, hi some embodiments, the set of precoding matrices may include one or more non-coherent precoding matrices.

[0040] In some embodiments, a parameter “N1” may be present, where “N1” represents the number of ports in a first dimension. For example, “N1” may be at least one of {1, 2, 4, 8}. For another example, “N1” may be 2 or 4. In some embodiments, a parameter “N2” may be present, where “N2” represents the number of ports in a second dimension. For example, “N2” may be at least one of {1, 2, 4, 8}. For another example, “N2” may be 1 or 2. In some embodiments, a parameter “O1” may be present, where “O1” represents a first discrete Fourier transform (DFT) oversampling in the first dimension. For example, “O1” may be at least one of {1, 2, 4}. For another example, “O1” may be 2 or 4. In some embodiments, a parameter “O2” may be present, where “O2” represents a second DFT oversampling in the second dimension. For example, "O2" may be at least one of {1, 2, 4}. For another example, "O2" may be 2 or 4.

[0041] In some embodiments, the first vector TIFF2025511321000002.tif6150. In some embodiments, TIFF2025511321000003.tif6150 may be a DFT vector. If the file is TIFF2025511321000004.tif7150, TIFF2025511321000005.tif18150. In some embodiments, If the file is TIFF2025511321000006.tif7150, TIFF2025511321000007.tif15150. In some embodiments, If the file is TIFF2025511321000008.tif7150, TIFF2025511321000009.tif6150. In some embodiments, TIFF2025511321000010.tif6150 can be a non-negative integer. For example, TIFF2025511321000011.tif7150. Another example: TIFF2025511321000012.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000013.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000014.tif6150 can be 0 or 1. For another example, TIFF2025511321000015.tif6150 may be 0.

[0042] In some embodiments, the second vector TIFF2025511321000016.tif6150. In some embodiments, TIFF2025511321000017.tif19150. In some embodiments, TIFF2025511321000018.tif7150, and If the file is TIFF2025511321000019.tif7150, TIFF2025511321000020.tif17150. In some embodiments, TIFF2025511321000021.tif7150, and If the file is TIFF2025511321000022.tif7150, TIFF2025511321000023.tif17150. In some embodiments, TIFF2025511321000024.tif6150 can be a non-negative integer. For example, TIFF2025511321000025.tif7150. Another example: TIFF2025511321000026.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000027.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000028.tif6150 may be 0 or 1. In some embodiments, TIFF2025511321000029.tif6150 may represent the transpose of a vector or a matrix.

[0043] In some embodiments, the factor TIFF2025511321000030.tif6150. In some embodiments, TIFF2025511321000031.tif9150. In some embodiments, TIFF2025511321000032.tif6150 can be a non-negative integer. For example, TIFF2025511321000033.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000034.tif6150 can be 0 or 1. For another example, TIFF2025511321000035.tif6150 can be 0 or 2. For another example, TIFF2025511321000036.tif6150 may be 0.

[0044] In some embodiments, if the number of layers is indicated as 8 for terminal device 110-1, there may be a first set of precoding matrices (e.g., a first set of fully coherent precoding matrices) corresponding to the 8 layers, and the fully coherent precoding matrices may be It may be represented as TIFF2025511321000037.tif10150.

[0045] In some embodiments, TIFF2025511321000038.tif10150 It could also be TIFF2025511321000039.tif29168.

[0046] In some embodiments, TIFF2025511321000040.tif10150 It could also be TIFF2025511321000041.tif29168.

[0047] In some embodiments, P may be 8 or 12 or 16. TIFF2025511321000042.tif6150 can be a non-negative integer. For example, TIFF2025511321000043.tif7150. Another example: TIFF2025511321000044.tif7150. Another example: TIFF2025511321000045.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000046.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000047.tif6150 may be 0 or 1. In some embodiments, TIFF2025511321000048.tif6150 can be a non-negative integer. For example, TIFF2025511321000049.tif7150. Another example: TIFF2025511321000050.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000051.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000052.tif6150 can be 0 or 1. For another example, TIFF2025511321000053.tif6150 may be 0. In some embodiments, TIFF2025511321000054.tif6150 can be a non-negative integer. For example, TIFF2025511321000055.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000056.tif6150 can be 0 or 1. For another example, TIFF2025511321000057.tif6150 may be 0 or 2. For another example, TIFF2025511321000058.tif6150 may be 0. In some embodiments, TIFF2025511321000059.tif7150. In some embodiments, TIFF2025511321000060.tif7150. In some embodiments, TIFF2025511321000061.tif7150. In some embodiments, TIFF2025511321000062.tif6150 and TIFF2025511321000063.tif6150 and TIFF2025511321000064.tif6150 and TIFF2025511321000065.tif6150 may be 0. In some embodiments, TIFF2025511321000066.tif7150. In some embodiments, TIFF2025511321000067.tif6150. In some embodiments, TIFF2025511321000068.tif7150. In some embodiments, TIFF2025511321000069.tif6150. In some embodiments, TIFF2025511321000070.tif7150. In some embodiments, The file is TIFF2025511321000071.tif7150.

[0048] In some embodiments, there may be two or more subsets of precoding matrices corresponding to the eight layers. In some embodiments, the first set of precoding matrices corresponding to the eight layers may include two or more subsets. For example, there may be two subsets of precoding matrices.

[0049] In some embodiments, there may be a first subset of precoding matrices corresponding to eight layers, and corresponding to the first subset of precoding matrices, the value of "N1" may be 4, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the first subset, TIFF2025511321000072.tif17150. In some embodiments, corresponding to the first subset: TIFF2025511321000073.tif6150 and TIFF2025511321000074.tif6150 and TIFF2025511321000075.tif6150 and TIFF2025511321000076.tif6150 may be 0. In some embodiments, corresponding to the first subset, TIFF2025511321000077.tif7150, TIFF2025511321000078.tif7150, and TIFF2025511321000079.tif7150. In some embodiments, corresponding to the first subset: TIFF2025511321000080.tif6150 may be a non-negative integer, TIFF2025511321000081.tif7150. For example, TIFF2025511321000082.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000083.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000084.tif6150 can be 0 or 1. For another example, TIFF2025511321000085.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the first subset corresponding to 8 layers may be 32, 16, 8, 4, or 2.

[0050] In some embodiments, there may be a second subset of precoding matrices corresponding to eight layers, and corresponding to the second subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 2, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 4, 2, or 1. In some embodiments, corresponding to the second subset, TIFF2025511321000086.tif17150. In some embodiments, corresponding to the second subset: TIFF2025511321000087.tif7150, TIFF2025511321000088.tif6150, and TIFF2025511321000089.tif7150. In some embodiments, corresponding to the second subset: TIFF2025511321000090.tif6150, TIFF2025511321000091.tif7150, and TIFF2025511321000092.tif7150. In some embodiments, corresponding to the second subset: TIFF2025511321000093.tif6150 may be a non-negative integer, TIFF2025511321000094.tif7150. For example, TIFF2025511321000095.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000096.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000097.tif6150 can be 0 or 1. For another example, TIFF2025511321000098.tif6150 may be 0 or 2. In some embodiments, corresponding to the second subset, TIFF2025511321000099.tif6150 can be a non-negative integer. For example, TIFF2025511321000100.tif7150. Another example: TIFF2025511321000101.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000102.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000103.tif6150 can be 0 or 1. For another example, TIFF2025511321000104.tif6150 may be 0. In some embodiments, the number of precoding matrices in the second subset corresponding to 8 layers may be 128, 32, 16, 8, 4, or 2.

[0051] In some embodiments, a first set of precoding matrices corresponding to eight layers may be shown in Table 1 below. TIFF2025511321000105.tif91168

[0052] In some embodiments, the parameter "N1" represents the number of ports in the first dimension, the parameter "N2" represents the number of ports in the second dimension, the parameter "O1" represents a first discrete Fourier transform (DFT) oversampling in the first dimension, and the parameter "O2" represents a second DFT oversampling in the second dimension, and the parameter "i" represents an element in the precoding matrix.

[0053] In some embodiments, N1 may be equal to 4, N2 may be equal to 1, O1 may be equal to 2, O2 may be equal to 1, and i 1,1may be one of {0,...N1O1-1} or {0,2,4,6} or {0,4} or {0,1} or 0 or {0,...N1O1 / 2-1} or {0,2}. In some embodiments, a first subset of fully coherent precoding matrices corresponding to eight layers, e.g., "Set_f8_1," may include 16 precoding matrices. In some embodiments, the subset of precoding matrices "Set_f8_1" may include eight precoding matrices. Alternatively, the subset of precoding matrices "Set_f8_1" may include four precoding matrices. In other embodiments, the subset of precoding matrices "Set_f8_1" may include two precoding matrices.

[0054] Alternatively, N1 may be equal to 2, N2 may be equal to 2, O1 may be equal to 1 or 4, O2 may be equal to 2 or 4, and i 1,1 or i 1,2 may be one of {0,...7} or {0,2,4,6} or {0,4} or {0,...3} or {0,2} or {0,1} or 0. In some embodiments, a second subset of fully coherent precoding matrices corresponding to eight layers, e.g., "Set_f8_2," may include 128 precoding matrices. In some embodiments, the subset of precoding matrices "Set_f8_2" may include 32 precoding matrices. Alternatively, the subset of precoding matrices "Set_f8_2" may include eight precoding matrices. In other embodiments, the subset of precoding matrices "Set_f8_2" may include two precoding matrices.

[0055] In some embodiments, if the number of layers is indicated as 8 for terminal device 110-1, there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to the eight layers. For example, if terminal device 110-1 has eight antenna ports, or if the PUSCH transmission of terminal device 110-1 is associated with eight antenna ports, or if the PUSCH transmission of terminal device 110-1 is associated with an SRS having eight ports, four antenna ports (e.g., four ports in the first set) may be coherent and the other four antenna ports (e.g., four ports in the second set) may be coherent. For example, the four ports in the first set may not be coherent with the four ports in the second set. In some embodiments, there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to eight layers, represented as, for example, "Set_p8_1," and the size of the partially coherent precoding matrix may be 8×8. In some embodiments, the precoding matrix may have eight columns or rows. In some embodiments, a column or row of the precoding matrix may have eight elements. In some embodiments, for a column or row of the partially coherent precoding matrix, four of the eight elements in the partially coherent precoding matrix may have non-zero values. The other four elements in the partially coherent precoding matrix may have values ​​of zero. In some embodiments, there may be four of the eight columns or rows in the precoding matrix (e.g., a first set of four columns or rows), and in each column or row, non-zero values ​​may be mapped to four of the eight elements and zeros may be mapped to the other four elements. For example, the indices of the four elements with non-zero values ​​may be the same within the first set of four columns or rows.For example, the index of the four elements having non-zero values ​​may be idx_1, where idx_1 may be one of four values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. For example, idx_1 may be {0, 1, 2, 3} or {0, 2, 4, 6} or {1, 2, 3, 4} or {1, 3, 5, 7}. In some embodiments, the four values ​​of idx_1 may be based on the indexes of antenna ports in a first group having four antenna ports. In some embodiments, for the other four columns or rows of the eight columns or rows in the precoding matrix (e.g., the four columns or rows of a second set), in each column or row, non-zero values ​​may be mapped to four of the eight elements, and zeros may be mapped to the other four elements. For example, the indexes of the four elements having non-zero values ​​may be the same within the four columns or rows of the second set. For example, the index of the four elements having non-zero values ​​may be idx_2, and idx_2 may be one of four values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. For example, idx_2 may be {4, 5, 6, 7} or {1, 3, 5, 7} or {5, 6, 7, 8} or {2, 4, 6, 8}. In some embodiments, the four values ​​of idx_2 may be based on the indexes of antenna ports in a second group having four antenna ports. In some embodiments, any value of idx_1 may be different from any value of idx_2.

[0056] In some embodiments, there may be two sets of length-4 vectors, each set including four length-4 vectors. In some embodiments, values ​​in the length-4 vectors may apply to four non-zero values ​​that map to four elements in a column or row of the precoding matrix. For example, the first set of length-4 vectors may be {[1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], [1;-1;-1;1]}. For another example, the second set of length-4 vectors may be {[1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], [1;-1;-j;j]}. In some embodiments, the four values ​​in each vector of the first or second set may map to four of the eight elements, with zeros mapping to the other four elements in a column or row of the precoding matrix. In some embodiments, a set of precoding matrices "Set_p8_1" may include 280 precoding matrices, where C(2,1)*C(2,1)*C(8,4). In some embodiments, C(x,y) may represent permutations and combinations. For example, C(x,y) may represent the number of possibilities for selecting y values ​​from x values. In some embodiments, Table 2 below shows an example of a vector of four non-zero values ​​that are mapped to four of the eight elements in a column or row in a partially coherent precoding matrix. TIFF2025511321000106.tif74168

[0057] In some embodiments, example precoding matrices of the second set of precoding matrices corresponding to eight layers are: TIFF2025511321000107.tif50150 or TIFF2025511321000108.tif50150. For example, rows or columns may be swapped. For example, each of [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be one of the length-4 vectors in the first set of length-4 vectors or in the second set of length-4 vectors. For example, each of [e1, e2, e3, e4], [f1, f2, f3, f4], [g1, g2, g3, g4], and [h1, h2, h3, h4] may be one of the length-4 vectors in the first set of length-4 vectors or in the second set of length-4 vectors. For example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1], respectively. For another example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j], respectively. For example, [e1, e2, e3, e4], [f1, f2, f3, f4], [g1, g2, g3, g4], and [h1, h2, h3, h4] may be [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1;1], and [1;-1;-1;1], respectively. For another example, [e1, e2, e3, e4], [f1, f2, f3, f4], [g1, g2, g3, g4], and [h1, h2, h3, h4] may be [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j], respectively.

[0058] In some embodiments, TIFF2025511321000109.tif6150 may be a positive integer. For example, TIFF2025511321000110.tif7150. For example, TIFF2025511321000111.tif6150 can be 64 or 32 or 16 or 8 or 4 or 2.

[0059] In some embodiments, if the number of layers is indicated as 8 for the terminal device 110-1, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) corresponding to the eight layers. For example, the eight-port structure may be 2+2+2+2, which means there are four groups, each group including two antenna ports, and in each group, the two antenna ports may be coherent. For example, antenna ports may not be coherent between groups. In some embodiments, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) corresponding to the eight layers, represented as, for example, "Set_p8_2," and the size of the precoding matrix may be 8x8. In some embodiments, there may be eight columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the precoding matrix, two of the eight elements in the precoding matrix may have non-zero values. The values ​​of the other six elements in the precoding matrix may be 0. In some embodiments, there may be two columns or rows (e.g., two columns or rows in a first set) of eight columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and 0 may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within two columns or rows of the first set. For example, the indices of two elements with non-zero values ​​may be idx_1, where idx_1 may be two values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_1 may be based on the indices of two antenna ports from four antenna ports in the first group.In some embodiments, the two values ​​of idx_1 may be based on the indices of two antenna ports in the third group. For example, idx_1 may be {0, 1} or {0, 2} or {1, 2} or {1, 3} or {0, 4} or {1, 5}. In some embodiments, there may be two columns or rows (e.g., two columns or rows in the second set) among the eight columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and zero may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within two columns or rows in the second set. For example, the indices of two elements with non-zero values ​​may be idx_2, and idx_2 may be two values ​​among {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_2 may be based on the indexes of the other two antenna ports among the four antenna ports in the first group. In some embodiments, the two values ​​of idx_2 may be based on the indexes of the two antenna ports in the fourth group. For example, idx_2 may be {2, 3} or {1, 3} or {3, 4} or {2, 4} or {1, 5} or {2, 6}. In some embodiments, there may be two columns or rows (e.g., two columns or rows in a third set) among the eight columns or rows in the precoding matrix, and in each column or row, non-zero values ​​may be mapped to two of the eight elements and zeros may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within two columns or rows in the third set. For example, the index of the two elements having non-zero values ​​may be idx_3, and idx_3 may be two values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_3 may be based on the indexes of two antenna ports of the four antenna ports in the second group.In some embodiments, the two values ​​of idx_3 may be based on the indices of two antenna ports in the fifth group. For example, idx_3 may be {4, 5} or {4, 6} or {5, 6} or {5, 7} or {2, 6} or {3, 7}. In some embodiments, there may be two columns or rows (e.g., two columns or rows in the fourth set) among the eight columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and zero may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within two columns or rows in the fourth set. For example, the indices of two elements with non-zero values ​​may be idx_4, and idx_4 may be two values ​​among {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_4 may be based on the indexes of the other two antenna ports among the four antenna ports in the first group. In some embodiments, the two values ​​of idx_4 may be based on the indexes of the two antenna ports in the sixth group. For example, idx_4 may be {6, 7} or {5, 7} or {7, 8} or {6, 8} or {3, 7} or {4, 8}. In some embodiments, any value of idx_1, any value of idx_2, any value of idx_3, and any value of idx_4 may be different from each other.

[0060] In some embodiments, there may be a set of four length-2 vectors, each of which may be applied as two non-zero values ​​in a column or row of the precoding matrix. In some embodiments, for a third set of precoding matrices Set_p8_2, two length-2 vectors may be selected from the four length-2 vectors, and the two values ​​in each vector may be mapped to two of the eight elements, with 0 being mapped to the other element in a column or row of the precoding matrix. In some embodiments, there may be two sets of length-2 vectors, each set including two length-2 vectors. In some embodiments, the two values ​​in a length-2 vector may be applied as two non-zero values ​​mapped to two elements in a column or row of the precoding matrix. For example, the first set of length-2 vectors may be {[1;1], [1;-1]}. For another example, the second set of length-2 vectors may be {[1;j], [1;-j]}. In some embodiments, two values ​​in each vector of the first or second set may be mapped to two of the eight elements, and zeros may be mapped to the other six elements in a column or row of the precoding matrix. For example, Table 3 below shows an example of a set of length-2 vectors. In some embodiments, for two columns or rows of the first set, and / or for two columns or rows of the second set, and / or for two columns or rows of the third set, and / or for two columns or rows of the fourth set, the two vectors selected to map to the two non-zero values ​​on two of the eight elements in each column or row may be {[1;1] and [1;-1]} or {[1;j] and [1;-j]}. TIFF2025511321000112.tif12168

[0061] In some embodiments, example precoding matrices of the third set of precoding matrices corresponding to eight layers are: TIFF2025511321000113.tif50150 or TIFF2025511321000114.tif50150. For example, rows or columns may be swapped. For example, [a1, a2] and [b1, b2] may each be one of the length-2 vectors in the first set of length-2 vectors or in the second set of length-2 vectors. For example, [c1, c2] and [d1, d2] may each be one of the length-2 vectors in the first set of length-2 vectors or in the second set of length-2 vectors. For example, [e1, e2] and [f1, f2] may each be one of the length-2 vectors in the first set of length-2 vectors or in the second set of length-2 vectors. For example, [g1, g2] and [h1, h2] may each be one of the length-2 vectors in the first set of length-2 vectors or in the second set of length-2 vectors. For example, [a1,a2] and [b1,b2] may be [1;1] and [1;-1], respectively. For another example, [a1,a2] and [b1,b2] may be [1;j] and [1;-j], respectively. For example, [c1,c2] and [d1,d2] may be [1;1] and [1;-1], respectively. For another example, [c1,c2] and [d1,d2] may be [1;j] and [1;-j], respectively. For example, [e1,e2] and [f1,f2] may be [1;1] and [1;-1], respectively. For another example, [e1,e2] and [f1,f2] may be [1;j] and [1;-j], respectively. For example, [g1,g2] and [h1,h2] may be [1;1] and [1;-1], respectively. For another example, [g1, g2] and [h1, h2] may be [1; j] and [1; -j], respectively.

[0062] In some embodiments, if the number of layers is indicated as 8 for terminal device 110-1, there may be a fourth set of precoding matrices (e.g., a fourth set of non-coherent precoding matrices) corresponding to eight layers. For example, each of the eight antenna ports may be non-coherent with respect to one another. In some embodiments, there may be a fourth set of precoding matrices (e.g., a fourth set of non-coherent precoding matrices) corresponding to eight layers, for example, represented as "Set_n8_1," and the size of the precoding matrix may be 8×8. In some embodiments, there may be eight columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the precoding matrix, one element of the eight elements in the precoding matrix may have a non-zero value. For example, the non-zero value may be 1. The values ​​of the other seven elements in the precoding matrix may be 0. In some embodiments, for each of the eight columns or rows in the precoding matrix, the non-zero value may be mapped to one of the eight elements, and 0 may be mapped to the other seven elements. For example, the index of the elements having non-zero values ​​may be different in each row or column of the precoding matrix. For example, the index of an element having a non-zero value may be idx_1, idx_2, idx_3, idx_4, idx_5, idx_6, idx_7, idx_8 for the first, second, third, fourth, fifth, sixth, seventh, and eighth columns or rows of the precoding matrix, respectively, and for each of idx_1, idx_2, idx_3, idx_4, idx_5, idx_6, idx_7, idx_8, the value may be one of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. For example, the values ​​of idx_1, idx_2, idx_3, idx_4, idx_5, idx_6, idx_7, idx_8 may be 0, 1, 2, 3, 4, 5, 6, and 7, respectively.For another example, the values ​​of idx_1, idx_2, idx_3, idx_4, idx_5, idx_6, idx_7, and idx_8 may be 1, 2, 3, 4, 5, 6, 7, and 8, respectively. In some embodiments, for example, the values ​​of idx_1, idx_2, idx_3, idx_4, idx_5, idx_6, idx_7, and idx_8 may be different from each other.

[0063] In some embodiments, if the number of layers is shown as eight for terminal device 110-1, there may be a fourth set of precoding matrices corresponding to eight layers. For example, there may be only one precoding matrix (e.g., a non-coherent precoding matrix) in the fourth set corresponding to eight layers. In some embodiments, Table 4 shows an exemplary non-coherent precoding matrix. For example, the rows or columns of the precoding matrices in Table 4 may be swapped. TIFF2025511321000115.tif59168, for example The file is TIFF2025511321000116.tif7150.

[0064] In some embodiments, if the number of layers is indicated as 8 in the terminal device 110-1, there may be a fifth set of precoding matrices (e.g., mixed partially coherent precoding matrices) corresponding to the eight layers. For example, the eight-port structure may be 4+2+2, which means that four antenna ports may be coherent, two antenna ports may be coherent, and the other two antenna ports may be coherent. In some embodiments, there may be a fifth set of precoding matrices (e.g., mixed partially coherent precoding matrices) corresponding to the eight layers, represented as, for example, "Set_p8_3," and the size of the partially coherent precoding matrix may be 8x8. In some embodiments, there may be eight columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, there may be four columns or rows (e.g., four columns or rows in a first set) of eight columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to four of the eight elements, and zero may be mapped to the other four elements. For example, the indices of the four elements with non-zero values ​​may be the same within the four columns or rows of the first set. For example, the indices of the four elements with non-zero values ​​may be idx_1, and idx_1 may be one of four values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. For example, idx_1 may be {0, 1, 2, 3} or {0, 2, 4, 6} or {1, 2, 3, 4} or {1, 3, 5, 7}. In some embodiments, there may be two columns or rows (e.g., two columns or rows of the second set) of the eight columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements and zero may be mapped to the other six elements. For example, the indices of the two elements with non-zero values ​​may be the same in the two columns or rows of the second set.For example, the index of two elements having non-zero values ​​may be idx_2, where idx_2 may be two values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. For example, idx_2 may be {4, 5} or {1, 3} or {5, 6} or {2, 4}. In some embodiments, there may be two columns or rows (e.g., two columns or rows of a third set) of eight columns or rows in the precoding matrix, and in each column or row, non-zero values ​​may be mapped to two of the eight elements, and zeros may be mapped to the other six elements. For example, the index of two elements having non-zero values ​​may be the same within two columns or rows of the third set. For example, the index of two elements having non-zero values ​​may be idx_3, where idx_3 may be two values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. For example, idx_3 may be {6, 7} or {5, 7} or {7, 8} or {6, 8}. In some embodiments, any value of idx_1, any value of idx_2, and any value of idx_3 may be different from each other. In some embodiments, values ​​in a first set of length-4 vectors or a second set of length-4 vectors may apply to four non-zero values ​​that map to four elements in a column or row of four columns or rows of the first set of precoding matrices. For example, the first set of length-4 vectors may be {[1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], [1;-1;-1;1]}. For another example, the second set of length-4 vectors may be {[1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], [1;-1;-j;j]}. In some embodiments, the four values ​​in each vector of the first or second set may be mapped to four of the eight elements, and zeros may be mapped to the other four elements in a column or row of the precoding matrix.In some embodiments, two values ​​in a length-2 vector of a first set or a second set of length-2 vectors may be applied as two non-zero values ​​that are mapped to two elements in a column or row of two columns or rows of a second set of the precoding matrix. In some embodiments, two values ​​in a length-2 vector of a first set or a second set of length-2 vectors may be applied as two non-zero values ​​that are mapped to two elements in a column or row of two columns or rows of a third set of the precoding matrix. For example, the length-2 vectors of the first set may be {[1;1], [1;-1]}. For another example, the length-2 vectors of the second set may be {[1;j], [1;-j]}. In some embodiments, two values ​​in each vector of the first or second set may be mapped to two elements of eight elements, with zeros being mapped to the other six elements in a column or row of the precoding matrix.

[0065] In some embodiments, four of the eight columns may be mapped with length-4 vectors, two of the remaining four columns may be mapped with length-2 vectors, and the remaining three columns may be mapped with length-2 vectors. Table 5 shows an example of a fifth set of precoding matrices corresponding to eight layers, e.g., Set_p8_3. For example, rows or columns may be swapped. For example, each of [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be one of the length-4 vectors in the first set of length-4 vectors or the second set of length-4 vectors. For example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1], respectively. For another example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j], respectively. For example, [e1, e2] and [f1, f2] may be [1;1] and [1;-1], respectively. For another example, [e1, e2] and [f1, f2] may be [1; j] and [1; -j], respectively. For example, [g1, g2] and [h1, h2] may be [1; 1] and [1; -1], respectively. For another example, [g1, g2] and [h1, h2] may be [1; j] and [1; -j], respectively. TIFF2025511321000117.tif56168

[0066] In another embodiment, if the number of layers in the terminal device 110-1 is shown as eight, there may be a sixth set of precoding matrices (e.g., mixed partially coherent and non-coherent precoding matrices) corresponding to eight layers. For example, the structure of eight antenna ports may be 4+1+1+1+1, meaning that four antenna ports may be coherent and the remaining four antenna ports may be non-coherent. Table 6 shows an example of a sixth set of precoding matrices corresponding to eight layers, e.g., Set_p8_4. For example, rows or columns may be swapped. For example, each of [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be one of the length-4 vectors in the first set of length-4 vectors or the second set of length-4 vectors. For example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1], respectively. For another example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j], respectively. TIFF2025511321000118.tif57168

[0067] In some embodiments, if the number of layers in terminal device 110-1 is shown as 8, there may be a seventh set of precoding matrices (e.g., mixed partially coherent and noncoherent precoding matrices) corresponding to the eight layers. For example, the eight-port structure may be 4+2+1+1, meaning that four antenna ports may be coherent and two antenna ports may be coherent. Table 7 shows an example of a seventh set of precoding matrices corresponding to eight layers, e.g., Set_p8_5. For example, rows or columns may be swapped. For example, each of [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be one of the length-4 vectors in the first set of length-4 vectors or the second set of length-4 vectors. For example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1], respectively. For another example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j], respectively. For example, [e1, e2] and [f1, f2] may be [1;1] and [1;-1], respectively. As another example, [e1, e2] and [f1, f2] may be [1; j] and [1; -j], respectively. TIFF2025511321000119.tif56168

[0068] In some other embodiments, if the number of layers in the terminal device 110-1 is shown as eight, there may be an eighth set of precoding matrices (e.g., mixed partially coherent and non-coherent precoding matrices) corresponding to the eight layers. For example, the eight-port structure may be 2+2+1+1+1+1, meaning that two antenna ports may be coherent and two antenna ports may be coherent. Table 8 shows an example of an eighth precoding matrix corresponding to eight layers, e.g., Set_p8_6. For example, rows or columns may be swapped. In some other embodiments, the antenna structure may be 2+1+1+1+1+1+1. Alternatively, the antenna structure may be 2+2+2+1+1. For example, [a1,a2] and [b1,b2] may be [1;1] and [1;-1], respectively. For another example, [a1,a2] and [b1,b2] may be [1;j] and [1;-j], respectively. For example, [c1,c2] and [d1,d2] may be [1;1] and [1;-1], respectively. For another example, [c1,c2] and [d1,d2] may be [1;j] and [1;-j], respectively. TIFF2025511321000120.tif57168

[0069] In some embodiments, the number of layers may be denoted as 7 for terminal device 110-1, and there may be a first set of precoding matrices (e.g., a first set of fully coherent precoding matrices) corresponding to the seven layers, where the fully coherent precoding matrices are It may be represented as TIFF2025511321000121.tif10150.

[0070] In some embodiments, TIFF2025511321000122.tif10150 It could also be TIFF2025511321000123.tif32168.

[0071] In some embodiments, TIFF2025511321000124.tif10150 It could also be TIFF2025511321000125.tif32168.

[0072] In some embodiments, P may be 8 or 12 or 16. TIFF2025511321000126.tif6150 can be a non-negative integer. For example, TIFF2025511321000127.tif7150. Another example: TIFF2025511321000128.tif7150. Another example: TIFF2025511321000129.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000130.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000131.tif6150 may be 0 or 1. In some embodiments, TIFF2025511321000132.tif6150 can be a non-negative integer. For example, TIFF2025511321000133.tif7150. Another example: TIFF2025511321000134.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000135.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000136.tif6150 can be 0 or 1. For another example, TIFF2025511321000137.tif6150 may be 0. In some embodiments, TIFF2025511321000138.tif6150 can be a non-negative integer. For example, TIFF2025511321000139.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000140.tif6150 can be 0 or 1. For another example, TIFF2025511321000141.tif6150 can be 0 or 2. For another example, TIFF2025511321000142.tif6150 may be 0. In some embodiments, TIFF2025511321000143.tif7150. In some embodiments, TIFF2025511321000144.tif7150. In some embodiments, TIFF2025511321000145.tif7150. In some embodiments, TIFF2025511321000146.tif6150 and TIFF2025511321000147.tif6150 and TIFF2025511321000148.tif6150 and TIFF2025511321000149.tif6150 may be 0. In some embodiments, TIFF2025511321000150.tif7150. In some embodiments, TIFF2025511321000151.tif6150. In some embodiments, TIFF2025511321000152.tif7150. In some embodiments, TIFF2025511321000153.tif6150. In some embodiments, TIFF2025511321000154.tif7150. In some embodiments, The file is TIFF2025511321000155.tif7150.

[0073] In some embodiments, there may be two or more subsets of precoding matrices corresponding to the seven layers. In some embodiments, the first set of precoding matrices corresponding to the seven layers may include two or more subsets. For example, there may be two subsets of precoding matrices.

[0074] In some embodiments, there may be a first subset of precoding matrices corresponding to seven layers, and corresponding to the first subset of precoding matrices, the value of "N1" may be 4, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the first subset, TIFF2025511321000156.tif17150. In some embodiments, corresponding to the first subset: TIFF2025511321000157.tif6150 and TIFF2025511321000158.tif6150 and TIFF2025511321000159.tif6150 and TIFF2025511321000160.tif6150 may be 0. In some embodiments, corresponding to the first subset, TIFF2025511321000161.tif7150, TIFF2025511321000162.tif7150, and TIFF2025511321000163.tif7150. In some embodiments, corresponding to the first subset: TIFF2025511321000164.tif6150 may be a non-negative integer, TIFF2025511321000165.tif7150. For example, TIFF2025511321000166.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000167.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000168.tif6150 can be 0 or 1. For another example, TIFF2025511321000169.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the first subset corresponding to seven layers may be 32, 16, 8, 4, or 2.

[0075] In some embodiments, there may be a second subset of precoding matrices corresponding to seven layers, and corresponding to the second subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 2, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 4, 2, or 1. In some embodiments, corresponding to the second subset, TIFF2025511321000170.tif17150. In some embodiments, corresponding to the second subset: TIFF2025511321000171.tif7150, TIFF2025511321000172.tif6150, and TIFF2025511321000173.tif7150. In some embodiments, corresponding to the second subset: TIFF2025511321000174.tif6150, TIFF2025511321000175.tif7150, and TIFF2025511321000176.tif7150. In some embodiments, corresponding to the second subset: TIFF2025511321000177.tif6150 may be a non-negative integer, TIFF2025511321000178.tif7150. For example, TIFF2025511321000179.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000180.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000181.tif6150 can be 0 or 1. For another example, TIFF2025511321000182.tif6150 may be 0 or 2. In some embodiments, corresponding to the second subset, TIFF2025511321000183.tif6150 can be a non-negative integer. For example, TIFF2025511321000184.tif7150. Another example: TIFF2025511321000185.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000186.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000187.tif6150 can be 0 or 1. For another example, TIFF2025511321000188.tif6150 may be 0. In some embodiments, the number of precoding matrices in the second subset corresponding to seven layers may be 128, 32, 16, 8, 4, or 2.

[0076] In some embodiments, a first set of precoding matrices corresponding to seven layers may be shown in Table 9 below. TIFF2025511321000189.tif80168

[0077] In some embodiments, N1 may be equal to 4, N2 may be equal to 1, O1 may be equal to 2, O2 may be equal to 1, and i 1,1 may be one of {0,...N1O1-1} or {0,2,4,6} or {0,4} or {0,1} or 0 or {0,...N1O1 / 2-1} or {0,2}. A first subset of precoding matrices (e.g., "Set_f7_1") corresponding to seven layers may include 16 precoding matrices. In some embodiments, the first subset of precoding matrices "Set_f7_1" may include eight precoding matrices. Alternatively, the first subset of precoding matrices "Set_f7_1" may include four precoding matrices. In other embodiments, the first subset of precoding matrices "Set_f7_1" may include two precoding matrices.

[0078] Alternatively, N1 may be equal to 2, N2 may be equal to 2, O1 may be equal to 1 or 4, O2 may be equal to 2 or 4, and i 1,1 or i 1,2 may be one of {0,...7} or {0,2,4,6} or {0,4} or {0,...3} or {0,2} or {0,1} or 0. A second subset of precoding matrices (e.g., "Set_f7_2") corresponding to seven layers may include 128 precoding matrices. In some embodiments, the second subset of precoding matrices "Set_f7_2" may include 32 precoding matrices. Alternatively, the second subset of precoding matrices "Set_f7_2" may include eight precoding matrices. In other embodiments, the second subset of precoding matrices "Set_f7_2" may include two precoding matrices.

[0079] In some embodiments, the number of layers is shown as seven for terminal device 110-1, and there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to the seven layers. For example, if terminal device 110-1 has eight antenna ports, or if a PUSCH transmission for terminal device 110-1 is associated with eight antenna ports, or if a PUSCH transmission for terminal device 110-1 is associated with an SRS with eight ports, four antenna ports (e.g., four ports in the first set) may be coherent and the other four antenna ports (e.g., four ports in the second set) may be coherent. For example, the four ports in the first set may not be coherent with the four ports in the second set. In some embodiments, there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to seven layers, e.g., represented as "Set_p7_1," and the size of the partially coherent precoding matrices may be 7x8 or 8x7. In some embodiments, there may be seven columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the partially coherent precoding matrix, four of the eight elements in the partially coherent precoding matrix may have non-zero values. The other four elements in the partially coherent precoding matrix may have values ​​of zero. In some embodiments, there may be four of the seven columns or rows in the precoding matrix (e.g., four columns or rows in the first set), and in each column or row, non-zero values ​​may be mapped to four of the eight elements and zeros may be mapped to the other four elements. For example, the indices of four elements with non-zero values ​​may be the same within four columns or rows of the first set.For example, the index of the four elements having non-zero values ​​may be idx_1, where idx_1 may be one of four values ​​among {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. For example, idx_1 may be {0, 1, 2, 3} or {0, 2, 4, 6} or {1, 2, 3, 4} or {1, 3, 5, 7}. In some embodiments, the four values ​​of idx_1 may be based on the indexes of the four antenna ports in the first group. In some embodiments, for the other three columns or rows of the seven columns or rows in the precoding matrix (e.g., three columns or rows of the second set), in each column or row, non-zero values ​​may be mapped to four of the eight elements, and zeros may be mapped to the other four elements. For example, the indexes of the four elements having non-zero values ​​may be the same within the three columns or rows of the second set. For example, the index of the four elements having non-zero values ​​may be idx_2, and idx_2 may be one of four values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the four values ​​of idx_2 may be based on the indexes of the four antenna ports in the second group. For example, idx_2 may be {4, 5, 6, 7} or {1, 3, 5, 7} or {5, 6, 7, 8} or {2, 4, 6, 8}. In some embodiments, any value of idx_1 may be different from any value of idx_2.

[0080] In some embodiments, there may be two sets of length-4 vectors, each set including four length-4 vectors. In some embodiments, values ​​in the length-4 vectors may apply to four non-zero values ​​that map to four elements in a column or row of the precoding matrix. For example, the first set of length-4 vectors may be {[1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], [1;-1;-1;1]}. For another example, the second set of length-4 vectors may be {[1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], [1;-1;-j;j]}. In some embodiments, the four values ​​in each vector of the first or second set may map to four of the eight elements, with zeros mapping to the other four elements in a column or row of the precoding matrix. In some embodiments, the set of precoding matrices "Set_p7_1" may include C(2,1)*C(7,4)*C(2,1)*C(4,3) precoding matrices. In some embodiments, Table 10 below shows an example of four non-zero value vectors that map to four of the eight elements in a column or row in a partially coherent precoding matrix. TIFF2025511321000190.tif78168

[0081] In some embodiments, example precoding matrices of the second set of precoding matrices corresponding to seven layers are: TIFF2025511321000191.tif50150 or TIFF2025511321000192.tif50150. For example, rows or columns may be swapped. For example, each of [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be one of the length-4 vectors in the first set of length-4 vectors or in the second set of length-4 vectors. For example, each of [e1, e2, e3, e4], [f1, f2, f3, f4], and [g1, g2, g3, g4] may be one of the length-4 vectors in the first set of length-4 vectors or in the second set of length-4 vectors. For example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1], respectively. For another example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j], respectively. For example, [e1, e2, e3, e4], [f1, f2, f3, f4], and [g1, g2, g3, g4] may be three vectors selected from [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1]. For example, [e1, e2, e3, e4], [f1, f2, f3, f4], and [g1, g2, g3, g4] may be three vectors selected from [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j].

[0082] In some embodiments, TIFF2025511321000193.tif6150 may be a positive integer. For example, TIFF2025511321000194.tif7150. For example, TIFF2025511321000195.tif6150 can be 64 or 32 or 16 or 8 or 4 or 2 or 56 or 28 or 14.

[0083] In some embodiments, if the number of layers is indicated as 7 for the terminal device 110-1, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) corresponding to the seven layers. For example, the eight-port structure may be 2+2+2+2, meaning that there are four groups, each group includes two antenna ports, and in each group, the two antenna ports may be coherent. For example, antenna ports may not be coherent between groups. In some embodiments, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) represented as, for example, "Set_p7_2," and the size of the precoding matrix may be 7x8 or 8x7. In some embodiments, there may be seven columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the precoding matrix, two of the eight elements in the precoding matrix may have non-zero values. The values ​​of the other six elements in the precoding matrix may be 0. In some embodiments, there may be two columns or rows (e.g., two columns or rows in a first set) of seven columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and 0 may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within two columns or rows of the first set. For example, the indices of two elements with non-zero values ​​may be idx_1, where idx_1 may be two values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_1 may be based on the indices of two antenna ports from the four antenna ports in the first group.In some embodiments, the two values ​​of idx_1 may be based on the indices of two antenna ports in the third group. For example, idx_1 may be {0, 1} or {0, 2} or {1, 2} or {1, 3} or {0, 4} or {1, 5}. In some embodiments, there may be two columns or rows (e.g., two columns or rows in the second set) out of the seven columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and zero may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within two columns or rows in the second set. For example, the indices of two elements with non-zero values ​​may be idx_2, and idx_2 may be two values ​​out of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_2 may be based on the indexes of the other two antenna ports among the four antenna ports in the first group. In some embodiments, the two values ​​of idx_2 may be based on the indexes of the two antenna ports in the fourth group. For example, idx_2 may be {2, 3} or {1, 3} or {3, 4} or {2, 4} or {1, 5} or {2, 6}. In some embodiments, there may be two columns or rows (e.g., two columns or rows in a third set) among the seven columns or rows in the precoding matrix, and in each column or row, non-zero values ​​may be mapped to two elements among the eight elements, and zeros may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within two columns or rows in the third set. For example, the index of the two elements having non-zero values ​​may be idx_3, and idx_3 may be two values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_3 may be based on the indexes of two antenna ports of the four antenna ports in the second group.In some embodiments, the two values ​​of idx_3 may be based on the indices of two antenna ports in the fifth group. For example, idx_3 may be {4, 5} or {4, 6} or {5, 6} or {5, 7} or {2, 6} or {3, 7}. In some embodiments, there may be one column or row (e.g., one column or row of the fourth set) among the seven columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and zero may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within one column or row of the fourth set. For example, the indices of two elements with non-zero values ​​may be idx_4, and idx_4 may be two values ​​among {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_4 may be based on the indexes of the remaining two antenna ports of the four antenna ports in the second group. In some embodiments, the two values ​​of idx_4 may be based on the indexes of the two antenna ports in the sixth group. For example, idx_4 may be {6, 7} or {5, 7} or {7, 8} or {6, 8} or {3, 7} or {4, 8}. In some embodiments, any value of idx_1, any value of idx_2, any value of idx_3, and any value of idx_4 may be different from each other.

[0084] In some embodiments, there may be a set of four length-2 vectors, each of which may be applied as two non-zero values ​​in a column or row of the precoding matrix. In some embodiments, for a third set of precoding matrices corresponding to seven layers, e.g., Set_p7_2, two length-2 vectors may be selected from the four length-2 vectors, and the two values ​​in each vector may be mapped to two of the eight elements, with 0 being mapped to the other element in a column or row of the precoding matrix. In some embodiments, there may be two sets of length-2 vectors, each set including two length-2 vectors. In some embodiments, the two values ​​in a length-2 vector may be applied as two non-zero values ​​mapped to two elements in a column or row of the precoding matrix. For example, the first set of length-2 vectors may be {[1;1], [1;-1]}. For another example, the second set of length-2 vectors may be {[1;j], [1;-j]}. In some embodiments, two values ​​in each vector of the first or second set may be mapped to two of the eight elements, and zeros may be mapped to the other six elements in a column or row of the precoding matrix. For example, Table 11 below shows an example of a set of length-2 vectors. In some embodiments, for two columns or rows of the first set, and / or for two columns or rows of the second set, and / or for two columns or rows of the third set, and / or for one column or row of the fourth set, the two vectors selected to map to the two non-zero values ​​on two of the eight elements in each column or row may be {[1;1] and [1;-1]} or {[1;j] and [1;-j]}. TIFF2025511321000196.tif13168

[0085] In some embodiments, example precoding matrices of the third set of precoding matrices corresponding to seven layers are: TIFF2025511321000197.tif50150 or TIFF2025511321000198.tif50150. For example, rows or columns may be swapped. For example, [a1, a2] and [b1, b2] may each be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, [c1, c2] and [d1, d2] may each be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, [e1, e2] and [f1, f2] may each be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, [g1, g2] may be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, [a1, a2] and [b1, b2] may be [1;1] and [1;-1], respectively. For another example, [a1,a2] and [b1,b2] may be [1;j] and [1;-j], respectively. For example, [c1,c2] and [d1,d2] may be [1;1] and [1;-1], respectively. For another example, [c1,c2] and [d1,d2] may be [1;j] and [1;-j], respectively. For example, [e1,e2] and [f1,f2] may be [1;1] and [1;-1], respectively. For another example, [e1,e2] and [f1,f2] may be [1;j] and [1;-j], respectively. For example, [g1,g2] may be one of [1;1] and [1;-1]. For another example, [g1,g2] may be one of [1;j] and [1;-j], respectively.

[0086] In some embodiments, if the number of layers is indicated as 7 for the terminal device 110-1, there may be a fourth set of precoding matrices (e.g., a fourth set of noncoherent precoding matrices) corresponding to the seven layers. For example, each of the eight antenna ports may be noncoherent with respect to one another. In some embodiments, there may be a fourth set of precoding matrices (e.g., a fourth set of noncoherent precoding matrices) represented as, for example, "Set_n7_1," and the size of the precoding matrix may be 7×8 or 8×7. In some embodiments, there may be seven columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the precoding matrix, one element of the eight elements in the precoding matrix may have a nonzero value. For example, the nonzero value may be 1. The values ​​of the other seven elements in the precoding matrix may be 0. In some embodiments, for each of the seven columns or rows in the precoding matrix, the non-zero value may be mapped to one of the eight elements, and 0 may be mapped to the other seven elements. For example, the index of an element having a non-zero value may be different in each row or column of the precoding matrix. For example, the index of an element having a non-zero value may be idx_1, idx_2, idx_3, idx_4, idx_5, idx_6, and idx_7 for the first, second, third, fourth, fifth, sixth, and seventh columns or rows of the precoding matrix, respectively, and for each of idx_1, idx_2, idx_3, idx_4, idx_5, idx_6, and idx_7, the value may be one of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. For example, the values ​​of idx_1, idx_2, idx_3, idx_4, idx_5, idx_6, and idx_7 may be 0, 1, 2, 3, 4, 5, and 6, respectively.For another example, the values ​​of idx_1, idx_2, idx_3, idx_4, idx_5, idx_6, and idx_7 may be 1, 2, 3, 4, 5, 6, and 7, respectively. In some embodiments, the values ​​of idx_1, idx_2, idx_3, and idx_4 may be based on the indexes of four antenna ports in a first group. In some embodiments, the values ​​of idx_5, idx_6, and idx_7 may be based on the indexes of three of the four antenna ports in a second group. In some embodiments, the values ​​of idx_1 and idx_2 may be based on the indexes of two antenna ports in a third group. In some embodiments, the values ​​of idx_3 and idx_4 may be based on the indexes of two antenna ports in a fourth group. In some embodiments, the values ​​of idx_5 and idx_6 may be based on the indexes of two antenna ports in a fifth group. In some embodiments, the value of idx_7 may be based on the index of one of the two antenna ports in the sixth group. For example, the values ​​of idx_1, idx_2, idx_3, idx_4, idx_5, idx_6, and idx_7 may be different from each other.

[0087] In some embodiments, if the number of layers is shown as seven for terminal device 110-1, there may be a fourth set of precoding matrices corresponding to seven layers. For example, there may be only one precoding matrix (e.g., a non-coherent precoding matrix) in the fourth set corresponding to seven layers. In some embodiments, Table 12 shows an exemplary non-coherent precoding matrix. For example, the rows or columns of the precoding matrices in Table 12 may be swapped. TIFF2025511321000199.tif56168

[0088] for example, The file is TIFF2025511321000200.tif7150.

[0089] In some embodiments, if the number of layers is indicated as 7 for terminal device 110-1, there may be a fifth set of precoding matrices (e.g., mixed partially coherent precoding matrices) corresponding to the seven layers. For example, the eight-port structure may be 4+2+2, meaning that four antenna ports may be coherent, two antenna ports may be coherent, and the other two antenna ports may be coherent. In this case, four of the eight columns may be mapped with length-4 vectors, and for the remaining three columns, each column may be mapped with length-2 vectors, with the ports swapped. Table 13 shows an exemplary mixed partially coherent precoding matrix Set_p7_3, in which the rows or columns may be swapped. TIFF2025511321000201.tif57168

[0090] In another embodiment, if the number of layers is shown as 7 in the terminal device 110-1, there may be a sixth set of precoding matrices (e.g., mixed partially coherent and non-coherent precoding matrices) corresponding to the seven layers. For example, the structure of eight antenna ports may be 4+1+1+1+1, which means that four antenna ports may be coherent. Table 14 shows an example of a sixth set of precoding matrices corresponding to seven layers, e.g., Set_p7_4, in which the rows or columns may be swapped. TIFF2025511321000202.tif57168

[0091] In some embodiments, if the number of layers is shown as 7 for terminal device 110-1, there may be a seventh set of precoding matrices (e.g., mixed partially coherent and non-coherent precoding matrices) corresponding to the seven layers. For example, the eight-port structure may be 4+2+1+1, meaning that four antenna ports may be coherent and two antenna ports may be coherent. Table 15 shows an example of a seventh set of precoding matrices corresponding to seven layers, e.g., Set_p7_5, in which the rows or columns may be swapped. TIFF2025511321000203.tif58168

[0092] In some other embodiments, if the number of layers in terminal device 110-1 is shown as seven, there may be an eighth set of precoding matrices (e.g., mixed partially coherent and non-coherent precoding matrices) corresponding to seven layers. For example, the eight-port structure may be 2+2+1+1+1+1, meaning that two antenna ports may be coherent and two antenna ports may be coherent. Table 16 shows an example of an eighth precoding matrix, e.g., Set_p7_6, corresponding to seven layers, in which the rows or columns may be swapped. In some other embodiments, the antenna structure may be 2+1+1+1+1+1+1. Alternatively, the antenna structure may be 2+2+2+1+1. TIFF2025511321000204.tif58168

[0093] In some embodiments, the number of layers may be denoted as six for terminal device 110-1, and there may be a first set of precoding matrices (e.g., a first set of fully coherent precoding matrices) corresponding to the six layers, where the fully coherent precoding matrices are It may be represented as TIFF2025511321000205.tif10150.

[0094] In some embodiments, TIFF2025511321000206.tif10150 It could also be TIFF2025511321000207.tif36168.

[0095] In some embodiments, TIFF2025511321000208.tif10150 It could also be TIFF2025511321000209.tif18168.

[0096] In some embodiments, P may be 8 or 12 or 16. TIFF2025511321000210.tif6150 can be a non-negative integer. For example, TIFF2025511321000211.tif7150. Another example: TIFF2025511321000212.tif7150. Another example: TIFF2025511321000213.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000214.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000215.tif6150 may be 0 or 1. In some embodiments, TIFF2025511321000216.tif6150 can be a non-negative integer. For example, TIFF2025511321000217.tif7150. Another example: TIFF2025511321000218.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000219.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000220.tif6150 can be 0 or 1. For another example, TIFF2025511321000221.tif6150 may be 0. In some embodiments, TIFF2025511321000222.tif6150 can be a non-negative integer. For example, TIFF2025511321000223.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000224.tif6150 can be 0 or 1. For another example, TIFF2025511321000225.tif6150 may be 0 or 2. For another example, TIFF2025511321000226.tif6150 may be 0. In some embodiments, TIFF2025511321000227.tif7150. In some embodiments, TIFF2025511321000228.tif7150. In some embodiments, TIFF2025511321000229.tif6150 and TIFF2025511321000230.tif6150 and TIFF2025511321000231.tif6150 may be 0. In some embodiments, TIFF2025511321000232.tif7150. In some embodiments, TIFF2025511321000233.tif7150. In some embodiments, TIFF2025511321000234.tif6150. In some embodiments, The file is TIFF2025511321000235.tif7150.

[0097] In some embodiments, there may be two or more subsets of precoding matrices corresponding to the six layers. In some embodiments, the first set of precoding matrices corresponding to the six layers may include two or more subsets. For example, there may be two subsets of precoding matrices.

[0098] In some embodiments, there may be a first subset of precoding matrices corresponding to six layers, and corresponding to the first subset of precoding matrices, the value of "N1" may be 4, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the first subset, TIFF2025511321000236.tif17150. In some embodiments, corresponding to the first subset: TIFF2025511321000237.tif6150 and TIFF2025511321000238.tif6150 and TIFF2025511321000239.tif6150 may be 0. In some embodiments, corresponding to the first subset, TIFF2025511321000240.tif7150, TIFF2025511321000241.tif7150. In some embodiments, corresponding to the first subset: TIFF2025511321000242.tif6150 may be a non-negative integer, TIFF2025511321000243.tif7150. For example, TIFF2025511321000244.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000245.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000246.tif6150 can be 0 or 1. For another example, TIFF2025511321000247.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the first subset corresponding to six layers may be 32, 16, 8, 4, or 2.

[0099] In some embodiments, there may be a second subset of precoding matrices corresponding to six layers, and corresponding to the second subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 2, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 4, 2, or 1. In some embodiments, corresponding to the second subset, TIFF2025511321000248.tif17150. In some embodiments, corresponding to the second subset: TIFF2025511321000249.tif7150, TIFF2025511321000250.tif7150. In some embodiments, corresponding to the second subset: TIFF2025511321000251.tif6150, TIFF2025511321000252.tif7150 In some embodiments, corresponding to the second subset: TIFF2025511321000253.tif6150 may be a non-negative integer, TIFF2025511321000254.tif7150. For example, TIFF2025511321000255.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000256.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000257.tif6150 can be 0 or 1. For another example, TIFF2025511321000258.tif6150 may be 0 or 2. In some embodiments, corresponding to the second subset, TIFF2025511321000259.tif6150 can be a non-negative integer. For example, TIFF2025511321000260.tif7150. Another example: TIFF2025511321000261.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000262.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000263.tif6150 can be 0 or 1. For another example, TIFF2025511321000264.tif6150 may be 0. In some embodiments, the number of precoding matrices in the second subset corresponding to six layers may be 128, 32, 16, 8, 4, or 2.

[0100] In some embodiments, when the number of layers is indicated as 6 in terminal device 110-1, the fully coherent precoding matrix may be shown as in Table 17 below. TIFF2025511321000265.tif75168

[0101] In some embodiments, N1 may be equal to 4, N2 may be equal to 1, O1 may be equal to 2, O2 may be equal to 1, and i 1,1may be one of {0,...N1O1-1} or {0,2,4,6} or {0,4} or {0,1} or 0 or {0,...N1O1 / 2-1} or {0,2}. A first subset of precoding matrices corresponding to six layers, e.g., "Set_f6_1," may include 16 precoding matrices. In some embodiments, the first subset of precoding matrices "Set_f6_1" may include eight precoding matrices. Alternatively, the first subset of precoding matrices "Set_f6_1" may include four precoding matrices. In other embodiments, the first subset of precoding matrices "Set_f6_1" may include two precoding matrices.

[0102] Alternatively, N1 may be equal to 2, N2 may be equal to 2, O1 may be equal to 1 or 4, O2 may be equal to 2 or 4, and i 1,1 or i 1,2 may be one of {0,...7} or {0,2,4,6} or {0,4} or {0,...3} or {0,2} or {0,1} or 0. A second subset of precoding matrices corresponding to six layers, e.g., "Set_f6_2," may include 128 precoding matrices. In some embodiments, the second subset of precoding matrices "Set_f6_2" may include 32 precoding matrices. Alternatively, the second subset of precoding matrices "Set_f6_2" may include eight precoding matrices. In other embodiments, the second subset of precoding matrices "Set_f6_2" may include two precoding matrices.

[0103] In some embodiments, the number of layers is denoted as six for terminal device 110-1, and there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to the six layers. For example, if terminal device 110-1 has eight antenna ports, or if a PUSCH transmission for terminal device 110-1 is associated with eight antenna ports, or if a PUSCH transmission for terminal device 110-1 is associated with an SRS with eight ports, four antenna ports (e.g., the four ports of the first set) may be coherent and the other four antenna ports (e.g., the four ports of the second set) may be coherent. For example, the four ports of the first set may not be coherent with the four ports of the second set. In some embodiments, there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to six layers, e.g., represented as "Set_p6_1," and the size of the partially coherent precoding matrices may be 6x8 or 8x6. In some embodiments, there may be six columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the partially coherent precoding matrix, four of the eight elements in the partially coherent precoding matrix may have non-zero values. The other four elements in the partially coherent precoding matrix may have values ​​of zero. In some embodiments, there may be four of the six columns or rows in the precoding matrix (e.g., four columns or rows in the first set), and in each column, non-zero values ​​may be mapped to four of the eight elements and zeros may be mapped to the other four elements. For example, the indices of four elements with non-zero values ​​may be the same within four columns or rows of the first set.For example, the index of the four elements having non-zero values ​​may be idx_1, where idx_1 may be one of four values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. For example, idx_1 may be {0, 1, 2, 3} or {0, 2, 4, 6} or {1, 2, 3, 4} or {1, 3, 5, 7}. In some embodiments, the four values ​​of idx_1 may be based on the indexes of the four antenna ports in the first group. In some embodiments, for the other two columns, two of the length-4 vectors in the first set or the second set may be selected. In some embodiments, for the other two columns or rows of the six columns or rows in the precoding matrix (e.g., two columns or rows in the second set), non-zero values ​​may be mapped to four of the eight elements in each column or row, and zeros may be mapped to the other four elements. For example, the indices of four elements with non-zero values ​​may be the same within two columns or rows of the second set. For example, the indices of four elements with non-zero values ​​may be idx_2, and idx_2 may be four values ​​among {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the four values ​​of idx_2 may be based on the indices of two of the four antenna ports in the second group. For example, idx_2 may be {4, 5, 6, 7} or {1, 3, 5, 7} or {5, 6, 7, 8} or {2, 4, 6, 8}. In some embodiments, any value of idx_1 may be different from any value of idx_2. In some embodiments, alternatively, three of the six columns or rows (e.g., three columns or rows of the first set) may be selected. In each column, non-zero values ​​may map to four of the eight elements, and zeros may map to the other four elements. For example, the indices of the four elements with non-zero values ​​may be the same within three columns or rows of the first set.For example, the index of the four elements having non-zero values ​​may be idx_1, and idx_1 may be one of four values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the four values ​​of idx_1 may be based on the indexes of the four antenna ports in the first group. For example, idx_1 may be {0, 1, 2, 3} or {0, 2, 4, 6} or {1, 2, 3, 4} or {1, 3, 5, 7}. In some embodiments, for the other three columns or rows, three length-4 vectors from the first set or the second set may be selected. In some embodiments, for the other three columns, three length-4 vectors from the first set or the second set may be selected. In some embodiments, for the other three columns or rows of the six columns or rows in the precoding matrix (e.g., the three columns or rows of the second set), non-zero values ​​may be mapped to four of the eight elements in each column or row, and zeros may be mapped to the other four elements. For example, the indices of the four elements with non-zero values ​​may be the same within the three columns or rows of the second set. For example, the indices of the four elements with non-zero values ​​may be idx_2, and idx_2 may be one of four values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the four values ​​of idx_2 may be based on the indices of the four antenna ports in the first group. For example, idx_2 may be {4, 5, 6, 7} or {1, 3, 5, 7} or {5, 6, 7, 8} or {2, 4, 6, 8}. In some embodiments, any value of idx_1 may be different from any value of idx_2.

[0104] In some embodiments, there may be two sets of length-4 vectors, each set including four length-4 vectors. In some embodiments, values ​​in the length-4 vectors may apply to four non-zero values ​​that map to four elements in a column or row of the precoding matrix. For example, the first set of length-4 vectors may be {[1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], [1;-1;-1;1]}. For another example, the second set of length-4 vectors may be {[1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], [1;-1;-j;j]}. In some embodiments, the four values ​​in each vector in the first or second set may map to four of the eight elements, with zeros mapping to the other four elements in a column or row of the precoding matrix. In some embodiments, Table 18 below shows an example of a set of length-4 vectors. TIFF2025511321000266.tif77168

[0105] In some embodiments, example precoding matrices of the second set of precoding matrices corresponding to six layers are: TIFF2025511321000267.tif50150 or TIFF2025511321000268.tif50150. For example, rows or columns may be swapped. For example, rows or columns may be swapped. For example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may each be one of the length-4 vectors in the first set of length-4 vectors or in the second set of length-4 vectors. For example, [e1, e2, e3, e4], [f1, f2, f3, f4] may each be one of the length-4 vectors in the first set of length-4 vectors or in the second set of length-4 vectors. For example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1], respectively. For another example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j], respectively. For example, [e1, e2, e3, e4] and [f1, f2, f3, f4] may be two vectors selected from [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1]. For example, [e1, e2, e3, e4] and [f1, f2, f3, f4] may be two vectors selected from [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j]. For example, each of [a1, a2, a3, a4], [b1, b2, b3, b4], and [c1, c2, c3, c4] may be one of length-4 vectors in the first set of length-4 vectors or the second set of length-4 vectors. For example, each of [d1, d2, d3, d4], [e1, e2, e3, e4], and [f1, f2, f3, f4] may be one of the length-4 vectors in the first set of length-4 vectors or in the second set of length-4 vectors.For example, [a1, a2, a3, a4], [b1, b2, b3, b4], and [c1, c2, c3, c4] may be three of the vectors [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1]. For example, [a1, a2, a3, a4], [b1, b2, b3, b4], and [c1, c2, c3, c4] may be three of the vectors [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j]. For example, [d1, d2, d3, d4], [e1, e2, e3, e4], and [f1, f2, f3, f4] may be three vectors selected from [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1]. For example, [d1, d2, d3, d4], [e1, e2, e3, e4], and [f1, f2, f3, f4] may be three vectors selected from [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j].

[0106] In some embodiments, TIFF2025511321000269.tif6150 may be a positive integer. For example, TIFF2025511321000270.tif7150. For example, TIFF2025511321000271.tif6150 can be 64 or 32 or 16 or 8 or 4 or 2 or 48 or 24 or 12.

[0107] In some embodiments, if the number of layers is indicated as six for the terminal device 110-1, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) corresponding to six layers. For example, the eight-port structure may be 2+2+2+2, meaning that there are four groups, each group includes two antenna ports, and in each group, the two antenna ports may be coherent. For example, antenna ports may not be coherent between groups. In some embodiments, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) represented as, for example, "Set_p6_2," and the size of the precoding matrix may be 6×8 or 8×6. In some embodiments, there may be six columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the precoding matrix, two of the eight elements in the precoding matrix may have non-zero values. The values ​​of the other six elements in the precoding matrix may be 0. In some embodiments, there may be two columns or rows (e.g., two columns or rows in the first set) of the six columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and 0 may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within two columns or rows of the first set. For example, the indices of the two elements with non-zero values ​​may be idx_1, where idx_1 may be two values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_1 may be based on the indices of two antenna ports from the four antenna ports in the first group.In some embodiments, the two values ​​of idx_1 may be based on the indices of two antenna ports in the third group. For example, idx_1 may be {0, 1} or {0, 2} or {1, 2} or {1, 3} or {0, 4} or {1, 5}. In some embodiments, there may be two columns or rows (e.g., two columns or rows in the second set) of six columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and zero may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within two columns or rows in the second set. For example, the indices of two elements with non-zero values ​​may be idx_2, and idx_2 may be two values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_2 may be based on the indexes of the remaining two antenna ports among the four antenna ports in the first group. In some embodiments, the two values ​​of idx_2 may be based on the indexes of the two antenna ports in the fourth group. For example, idx_2 may be {2, 3} or {1, 3} or {3, 4} or {2, 4} or {1, 5} or {2, 6}. In some embodiments, there may be one or two columns or rows (e.g., one or two columns or rows of a third set) among the six columns or rows in the precoding matrix, and in each column or row, non-zero values ​​may be mapped to two elements among the eight elements, and zeros may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within one or two columns or rows of the third set. For example, the index of the two elements having non-zero values ​​may be idx_3, and idx_3 may be two values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_1 may be based on the indexes of two antenna ports of the four antenna ports in the second group.In some embodiments, the two values ​​of idx_1 may be based on the indices of two antenna ports in the fifth group. For example, idx_3 may be {4, 5} or {4, 6} or {5, 6} or {5, 7} or {2, 6} or {3, 7}. In some embodiments, there may be one or two columns or rows (e.g., one or two columns or rows in the fourth set) among the six columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and zero may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within one or two columns or rows in the fourth set. For example, the indices of two elements with non-zero values ​​may be idx_4, and idx_4 may be two values ​​among {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_4 may be based on the indexes of the remaining two antenna ports among the four antenna ports in the second group. In some embodiments, the two values ​​of idx_4 may be based on the indexes of the two antenna ports in the sixth group. For example, idx_4 may be {6, 7} or {5, 7} or {7, 8} or {6, 8} or {3, 7} or {4, 8}. In some embodiments, any value of idx_1, any value of idx_2, any value of idx_3, and any value of idx_4 may be different from each other. In some embodiments, the total number of columns or rows in the first set, second set, third set, and / or fourth set may be six. In some embodiments, there may be a first set, a second set, and a third set, each set having two columns or rows. In some embodiments, there may be a first set, a second set, a third set, and a fourth set, where two of the four sets each have two columns or rows, and the other two of the four sets each have one column or row.

[0108] In some embodiments, there may be a set of four length-2 vectors, each of which may be applied as two non-zero values ​​in a column or row of the precoding matrix. In some embodiments, for a third set of precoding matrices corresponding to six layers, e.g., Set_p6_2, two length-2 vectors may be selected from the four length-2 vectors, and the two values ​​in each vector may be mapped to two of the eight elements, with 0 being mapped to the other element in a column or row of the precoding matrix. In some embodiments, there may be two sets of length-2 vectors, each set including two length-2 vectors. In some embodiments, the two values ​​in a length-2 vector may be applied as two non-zero values ​​mapped to two elements in a column or row of the precoding matrix. For example, the first set of length-2 vectors may be {[1;1], [1;-1]}. For another example, the second set of length-2 vectors may be {[1;j], [1;-j]}. In some embodiments, two values ​​in each vector of the first or second set may be mapped to two of the eight elements, and zeros may be mapped to the other six elements in a column or row of the precoding matrix. For example, Table 19 below shows an example of a set of length-2 vectors. In some embodiments, for two columns or rows of the first set, and / or for two columns or rows of the second set, and / or for one or two columns or rows of the third set, and / or for one or two columns or rows of the fourth set, the two vectors selected to map to the two non-zero values ​​on two of the eight elements in each column or row may be {[1;1] and [1;-1]} or {[1;j] and [1;-j]}. TIFF2025511321000272.tif12168

[0109] In some embodiments, example precoding matrices of the third set of precoding matrices corresponding to six layers are: TIFF2025511321000273.tif50150 or TIFF2025511321000274.tif50150. For example, rows or columns may be swapped. For example, each of [a1, a2] and [b1, b2] may be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, each of [c1, c2] and [d1, d2] may be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, each of [e1, e2] and [f1, f2] may be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, [a1, a2] and [b1, b2] may be [1; 1] and [1; -1], respectively. For another example, [a1, a2] and [b1, b2] may be [1; j] and [1; -j], respectively. For example, [c1,c2] and [d1,d2] may be [1;1] and [1;-1], respectively. For another example, [c1,c2] and [d1,d2] may be [1;j] and [1;-j], respectively. For example, [e1,e2] and [f1,f2] may be [1;1] and [1;-1], respectively. For another example, [e1,e2] and [f1,f2] may be [1;j] and [1;-j], respectively. For example, [e1,e2] and [f1,f2] may be one of [1;1], [1;-1], [1;j] and [1;-j]. For example, [f1,f2] may be one of [1;1], [1;-1], [1;j] and [1;-j].

[0110] In some embodiments, if the number of layers is indicated as six for the terminal device 110-1, there may be a fourth set of precoding matrices (e.g., a fourth set of noncoherent precoding matrices) corresponding to six layers. For example, each of the eight antenna ports may be noncoherent with respect to one another. In some embodiments, there may be a fourth set of precoding matrices (e.g., a fourth set of noncoherent precoding matrices) represented as, for example, "Set_n6_1," and the size of the precoding matrix may be 6×8 or 8×6. In some embodiments, there may be six columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the precoding matrix, one element of the eight elements in the precoding matrix may have a nonzero value. For example, the nonzero value may be 1. The values ​​of the other seven elements in the precoding matrix may be 0. In some embodiments, for each of the six columns or rows in the precoding matrix, the non-zero value may be mapped to one of the eight elements, and 0 may be mapped to the other seven elements. For example, the index of an element having a non-zero value may be different in each row or column of the precoding matrix. For example, the index of an element having a non-zero value may be idx_1, idx_2, idx_3, idx_4, idx_5, and idx_6 for the first, second, third, fourth, fifth, and sixth columns or rows of the precoding matrix, respectively, and for each of idx_1, idx_2, idx_3, idx_4, idx_5, and idx_6, the value may be one of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the values ​​of idx_1, idx_2, idx_3, idx_4 may be based on the indexes of the four antenna ports in the first group.In some embodiments, the values ​​of idx_1, idx_2, and idx_3 may be based on the indexes of three of the four antenna ports in the first group. In some embodiments, the values ​​of idx_1 and idx_2 may be based on the indexes of two antenna ports in the third group. In some embodiments, the values ​​of idx_3 and idx_4 may be based on the indexes of two antenna ports in the fourth group. In some embodiments, the values ​​of idx_5 and idx_6 may be based on the indexes of two of the four antenna ports in the second group. In some embodiments, the values ​​of idx_5 and idx_6 may be based on the indexes of two antenna ports in the fifth group. In some embodiments, the values ​​of idx_5 and idx_6 may be based on the indexes of two antenna ports in the sixth group. For example, the values ​​of idx_1, idx_2, idx_3, idx_4, idx_5, and idx_6 may be 0, 1, 2, 3, 4, and 5, respectively. For another example, the values ​​of idx_1, idx_2, idx_3, idx_4, idx_5, and idx_6 may be 1, 2, 3, 4, 5, and 6, respectively. For example, the values ​​of idx_1, idx_2, idx_3, idx_4, idx_5, and idx_6 may be different from each other.

[0111] In some embodiments, if the number of layers is indicated as six for terminal device 110-1, there may be a fourth set of precoding matrices corresponding to six layers. For example, there may be only one precoding matrix (e.g., a non-coherent precoding matrix) in the fourth set corresponding to six layers. In some embodiments, Table 20 shows an exemplary non-coherent precoding matrix. For example, the rows or columns of the precoding matrices in Table 20 may be swapped. TIFF2025511321000275.tif56168

[0112] for example, The file is TIFF2025511321000276.tif7150.

[0113] In some embodiments, when there are six layers in terminal device 110-1, a mixed partially coherent matrix may be supported. For example, the antenna structure may be 4+2+2, meaning that four antenna ports may be coherent, two antenna ports may be coherent, and the other two antenna ports may be coherent. In this case, r1 (e.g., two, three, or four) columns may be mapped with a length-4 vector, and 6-r1 columns may be mapped with a length-2 vector, with the ports swapped. Table 21 shows an exemplary mixed partially coherent precoding matrix Set_p6_3 in which the rows may be swapped. TIFF2025511321000277.tif110168

[0114] In other embodiments, the antenna structure may be 4+1+1+1+1, meaning that four antenna ports may be coherent. In this case, r1 (e.g., two, three, or four) columns may have length-4 vectors, 6-r1 columns may have 1 on one element, and rows may be permuted. Table 22 shows an exemplary mixed partially coherent precoding matrix Set_p6_4, in which rows may be permuted. TIFF2025511321000278.tif111168

[0115] In some embodiments, the antenna structure may be 4+2+1+1, meaning that four antenna ports may be coherent and two antenna ports may be coherent. For example, r1 (e.g., 2, 3, or 4) columns may have length-4 vectors, r2 (e.g., 0, 1, 2) columns may have length-2 vectors, and 6-r1-r2 columns may have 1 on one element. Table 23 shows an exemplary mixed partially coherent precoding matrix Set_p6_5, in which rows may be swapped. TIFF2025511321000279.tif88168

[0116] In some other embodiments, the antenna structure may be 2+2+1+1+1+1, meaning that two antenna ports may be coherent and two antenna ports may be coherent. For example, r1 (e.g., two, three, or four) columns may have a length-2 vector, and 6-r1 columns may have a 1 on one element. Table 24 shows an exemplary mixed partially coherent precoding matrix Set_p6_6 in which rows may be swapped. In some other embodiments, the antenna structure may be 2+1+1+1+1+1+1. Alternatively, the antenna structure may be 2+2+2+1+1. TIFF2025511321000280.tif48168

[0117] In some embodiments, the number of layers may be denoted as 5 for terminal device 110-1, and there may be a first set of precoding matrices (e.g., a first set of fully coherent precoding matrices) corresponding to the five layers, where the fully coherent precoding matrices are It may be represented as TIFF2025511321000281.tif10150.

[0118] In some embodiments, TIFF2025511321000282.tif10150 It could also be TIFF2025511321000283.tif16150.

[0119] In some embodiments, TIFF2025511321000284.tif10150 It could also be TIFF2025511321000285.tif16150.

[0120] In some embodiments, P may be 8 or 12 or 16. TIFF2025511321000286.tif6150 can be a non-negative integer. For example, TIFF2025511321000287.tif7150. Another example: TIFF2025511321000288.tif7150. Another example: TIFF2025511321000289.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000290.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000291.tif6150 may be 0 or 1. In some embodiments, TIFF2025511321000292.tif6150 can be a non-negative integer. For example, TIFF2025511321000293.tif7150. Another example: TIFF2025511321000294.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000295.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000296.tif6150 can be 0 or 1. For another example, TIFF2025511321000297.tif6150 may be 0. In some embodiments, TIFF2025511321000298.tif6150 can be a non-negative integer. For example, TIFF2025511321000299.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000300.tif6150 can be 0 or 1. For another example, TIFF2025511321000301.tif6150 can be 0 or 2. For another example, TIFF2025511321000302.tif6150 may be 0. In some embodiments, TIFF2025511321000303.tif7150. In some embodiments, TIFF2025511321000304.tif7150. In some embodiments, TIFF2025511321000305.tif6150 and TIFF2025511321000306.tif6150 and TIFF2025511321000307.tif6150 may be 0. In some embodiments, TIFF2025511321000308.tif7150. In some embodiments, TIFF2025511321000309.tif7150. In some embodiments, TIFF2025511321000310.tif6150. In some embodiments, The file is TIFF2025511321000311.tif7150.

[0121] In some embodiments, there may be two or more subsets of precoding matrices corresponding to the five layers. In some embodiments, the first set of precoding matrices corresponding to the five layers may include two or more subsets. For example, there may be two subsets of precoding matrices.

[0122] In some embodiments, there may be a first subset of precoding matrices corresponding to five layers, and corresponding to the first subset of precoding matrices, the value of "N1" may be 4, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the first subset, TIFF2025511321000312.tif17150. In some embodiments, corresponding to the first subset: TIFF2025511321000313.tif6150 and TIFF2025511321000314.tif6150 and TIFF2025511321000315.tif6150 may be 0. In some embodiments, corresponding to the first subset, TIFF2025511321000316.tif7150, TIFF2025511321000317.tif7150. In some embodiments, corresponding to the first subset: TIFF2025511321000318.tif6150 may be a non-negative integer, TIFF2025511321000319.tif7150. For example, TIFF2025511321000320.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000321.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000322.tif6150 may be 0 or 1. For another example, TIFF2025511321000323.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the first subset corresponding to five layers may be 32, 16, 8, 4, or 2.

[0123] In some embodiments, there may be a second subset of precoding matrices corresponding to five layers, and corresponding to the second subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 2, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 4, 2, or 1. In some embodiments, corresponding to the second subset, TIFF2025511321000324.tif17150. In some embodiments, corresponding to the second subset: TIFF2025511321000325.tif7150, TIFF2025511321000326.tif7150. In some embodiments, corresponding to the second subset: TIFF2025511321000327.tif6150, TIFF2025511321000328.tif7150. In some embodiments, corresponding to the second subset: TIFF2025511321000329.tif6150 may be a non-negative integer, TIFF2025511321000330.tif7150. For example, TIFF2025511321000331.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000332.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000333.tif6150 can be 0 or 1. For another example, TIFF2025511321000334.tif6150 may be 0 or 2. In some embodiments, corresponding to the second subset, TIFF2025511321000335.tif6150 can be a non-negative integer. For example, TIFF2025511321000336.tif7150. Another example: TIFF2025511321000337.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000338.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000339.tif6150 can be 0 or 1. For another example, TIFF2025511321000340.tif6150 may be 0. In some embodiments, the number of precoding matrices in the second subset corresponding to five layers may be 128, 32, 16, 8, 4, or 2.

[0124] In some embodiments, when the number of layers is indicated as 5 in terminal device 110-1, the fully coherent precoding matrix may be shown as in Table 25 below. TIFF2025511321000341.tif73168

[0125] In some embodiments, N1 may be equal to 4, N2 may be equal to 1, O1 may be equal to 2, O2 may be equal to 1, and i 1,1may be one of {0,...N1O1-1} or {0,2,4,6} or {0,4} or {0,1} or 0 or {0,...N1O1 / 2-1} or {0,2}. A first subset of precoding matrices corresponding to five layers, e.g., "Set_f5_1," may include 16 precoding matrices. In some embodiments, the first subset of precoding matrices "Set_f5_1" may include eight precoding matrices. Alternatively, the first subset of precoding matrices "Set_f5_1" may include four precoding matrices. In other embodiments, the first subset of precoding matrices "Set_f5_1" may include two precoding matrices.

[0126] Alternatively, N1 may be equal to 2, N2 may be equal to 2, O1 may be equal to 1 or 4, O2 may be equal to 2 or 4, and i 1,1 or i 1,2 may be one of {0,...7} or {0,2,4,6} or {0,4} or {0,...3} or {0,2} or {0,1} or 0. A second subset of precoding matrices corresponding to five layers, e.g., "Set_f5_2," may include 128 precoding matrices. In some embodiments, the second subset of precoding matrices "Set_f5_2" may include 32 precoding matrices. Alternatively, the second subset of precoding matrices "Set_f5_2" may include eight precoding matrices. In other embodiments, the second subset of precoding matrices "Set_f5_2" may include two precoding matrices.

[0127] In some embodiments, the number of layers is denoted as five for terminal device 110-1, and there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to the five layers. For example, if terminal device 110-1 has eight antenna ports, or if a PUSCH transmission for terminal device 110-1 is associated with eight antenna ports, or if a PUSCH transmission for terminal device 110-1 is associated with an SRS with eight ports, four antenna ports (e.g., the four ports of the first set) may be coherent and the other four antenna ports (e.g., the four ports of the second set) may be coherent. For example, the four ports of the first set may not be coherent with the four ports of the second set. In some embodiments, there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to five layers, e.g., represented as "Set_p5_1," and the size of the partially coherent precoding matrices may be 5x8 or 8x5. In some embodiments, there may be five columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the partially coherent precoding matrix, four of the eight elements in the partially coherent precoding matrix may have non-zero values. The other four elements in the partially coherent precoding matrix may have values ​​of zero. In some embodiments, there may be C1 columns or rows of the five columns or rows in the precoding matrix (e.g., C1 columns or rows in the first set, e.g., C1 may be 1, 2, 3, or 4), and in each column, non-zero values ​​may be mapped to four of the eight elements and zeros may be mapped to the other four elements. For example, the indices of four elements with non-zero values ​​may be the same within C1 columns or rows of the first set.For example, the index of the four elements having non-zero values ​​may be idx_1, and idx_1 may be one of four values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the four values ​​of idx_1 may be based on the indexes of the four antenna ports in the first group. For example, idx_1 may be {0, 1, 2, 3} or {0, 2, 4, 6} or {1, 2, 3, 4} or {1, 3, 5, 7}. In some embodiments, 5-C1 of the length-4 vectors of the first set or the second set may be selected for the other 5-C1 columns. In some embodiments, for the other 5-C1 columns or rows of the five columns or rows in the precoding matrix (e.g., the second set of 5-C1 columns or rows), non-zero values ​​may be mapped to four of the eight elements in each column or row, and zeros may be mapped to the other four elements. For example, the indices of the four elements with non-zero values ​​may be the same within the second set of 5-C1 columns or rows. For example, the indices of the four elements with non-zero values ​​may be idx_2, and idx_2 may be one of the four values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the four values ​​of idx_2 may be based on the indices of the four antenna ports in the second group. For example, idx_2 may be {4, 5, 6, 7} or {1, 3, 5, 7} or {5, 6, 7, 8} or {2, 4, 6, 8}. In some embodiments, any value of idx_1 may be different from any value of idx_2. Alternatively, in some embodiments, three columns may be selected. In each column, non-zero values ​​may be mapped to four of the eight elements, and zeros may be mapped to the other four elements. For the other two columns, one matrix and two vectors may be selected.

[0128] In some embodiments, there may be two sets of length-4 vectors, each set including four length-4 vectors. In some embodiments, values ​​in the length-4 vectors may apply to four non-zero values ​​that map to four elements in a column or row of the precoding matrix. For example, the first set of length-4 vectors may be {[1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], [1;-1;-1;1]}. For another example, the second set of length-4 vectors may be {[1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], [1;-1;-j;j]}. In some embodiments, the four values ​​in each vector of the first or second set may map to four of the eight elements, with zeros mapping to the other four elements in a column or row of the precoding matrix. In some embodiments, Table 26 below shows the set of length-4 vectors. TIFF2025511321000342.tif78168

[0129] In some embodiments, example precoding matrices of the second set of precoding matrices corresponding to five layers are: TIFF2025511321000343.tif50150 or TIFF2025511321000344.tif50150. For example, rows or columns may be swapped. For example, rows or columns may be swapped. For example, each of [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be one of the length-4 vectors in the first set of length-4 vectors or in the second set of length-4 vectors. For example, [e1, e2, e3, e4] may be one of the length-4 vectors in the first set of length-4 vectors or in the second set of length-4 vectors. For example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1], respectively. For another example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j], respectively. For example, [e1, e2, e3, e4] may be one of the vectors [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1]. For example, [e1, e2, e3, e4] may be one of the vectors [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j]. For example, each of [a1, a2, a3, a4], [b1, b2, b3, b4], and [c1, c2, c3, c4] may be one of the length-4 vectors in the first set of length-4 vectors or the second set of length-4 vectors. For example, each of [d1, d2, d3, d4] and [e1, e2, e3, e4] may be one of the length 4 vectors in the first set of length 4 vectors or the second set of length 4 vectors. For example, [a1, a2, a3, a4], [b1, b2, b3, b4] and [c1, c2, c3, c4] may be three of the vectors [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1] and [1;-1;-1;1].For example, [a1, a2, a3, a4], [b1, b2, b3, b4], and [c1, c2, c3, c4] may be three of the following: [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j]. For example, [d1, d2, d3, d4] and [e1, e2, e3, e4] may be two of the following: [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1]. For example, [d1, d2, d3, d4] and [e1, e2, e3, e4] may be two of the following: [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j].

[0130] In some embodiments, TIFF2025511321000345.tif6150 may be a positive integer. For example, TIFF2025511321000346.tif7150. For example, TIFF2025511321000347.tif6150 can be 64 or 32 or 16 or 8 or 4 or 2 or 40 or 20 or 10.

[0131] In some embodiments, if the number of layers is indicated as 5 for the terminal device 110-1, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) corresponding to the five layers. For example, the eight-port structure may be 2+2+2+2, meaning that there are four groups, each group includes two antenna ports, and in each group, the two antenna ports may be coherent. For example, antenna ports may not be coherent between groups. In some embodiments, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) represented as, for example, "Set_p5_2," and the size of the precoding matrix may be 5x8 or 8x5. In some embodiments, there may be five columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the precoding matrix, two of the eight elements in the precoding matrix may have non-zero values. The values ​​of the other six elements in the precoding matrix may be 0. In some embodiments, there may be two columns or rows (e.g., two columns or rows in a first set) of five columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and 0 may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within two columns or rows of the first set. For example, the indices of two elements with non-zero values ​​may be idx_1, where idx_1 may be two values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_1 may be based on the indices of two antenna ports from the four antenna ports in the first group.In some embodiments, the two values ​​of idx_1 may be based on the indices of two antenna ports in the third group. For example, idx_1 may be {0, 1} or {0, 2} or {1, 2} or {1, 3} or {0, 4} or {1, 5}. In some embodiments, there may be one or two columns or rows (e.g., one or two columns or rows of the second set) out of the five columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and zero may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within one or two columns or rows of the second set. For example, the indices of two elements with non-zero values ​​may be idx_2, and idx_2 may be two values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_2 may be based on the indexes of the remaining two antenna ports among the four antenna ports in the first group. In some embodiments, the two values ​​of idx_2 may be based on the indexes of the two antenna ports in the fourth group. For example, idx_2 may be {2, 3} or {1, 3} or {3, 4} or {2, 4} or {1, 5} or {2, 6}. In some embodiments, there may be one or two columns or rows among the five columns or rows in the precoding matrix (e.g., one or two columns or rows in a third set), and in each column or row, non-zero values ​​may be mapped to two of the eight elements, and zeros may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within one or two columns or rows in the third set. For example, the index of the two elements having non-zero values ​​may be idx_3, and idx_3 may be two values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_3 may be based on the indexes of two antenna ports of the four antenna ports in the second group.In some embodiments, the two values ​​of idx_3 may be based on the indices of two antenna ports in the fifth group. For example, idx_3 may be {4, 5} or {4, 6} or {5, 6} or {5, 7} or {2, 6} or {3, 7}. In some embodiments, there may be one or two columns or rows (e.g., one or two columns or rows in the fourth set) out of the five columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and zero may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within one or two columns or rows in the fourth set. For example, the indices of two elements with non-zero values ​​may be idx_4, and idx_4 may be two values ​​out of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_4 may be based on the indexes of the remaining two antenna ports among the four antenna ports in the second group. In some embodiments, the two values ​​of idx_4 may be based on the indexes of the two antenna ports in the sixth group. For example, idx_4 may be {6, 7} or {5, 7} or {7, 8} or {6, 8} or {3, 7} or {4, 8}. In some embodiments, any value of idx_1, any value of idx_2, any value of idx_3, and any value of idx_4 may be different from each other. In some embodiments, the total number of columns or rows in the first set, second set, third set, and / or fourth set may be five. In some embodiments, there may be a first set, a second set, and a third set, where two of the three sets each have two columns or rows, and one of the three sets has one column or row. In some embodiments, there may be a first set, a second set, a third set, and a fourth set, where one of the four sets has two columns or rows, and three of the four sets each have one column or row.

[0132] In some embodiments, there may be a set of four length-2 vectors, each of which may be applied as two non-zero values ​​in a column or row of the precoding matrix. In some embodiments, for a third set of precoding matrices corresponding to five layers, e.g., Set_p5_2, two length-2 vectors may be selected from the four length-2 vectors, and the two values ​​in each vector may be mapped to two of the eight elements, with 0 being mapped to the other element in a column or row of the precoding matrix. In some embodiments, there may be two sets of length-2 vectors, each set including two length-2 vectors. In some embodiments, the two values ​​in a length-2 vector may be applied as two non-zero values ​​mapped to two elements in a column or row of the precoding matrix. For example, the first set of length-2 vectors may be {[1;1], [1;-1]}. For another example, the second set of length-2 vectors may be {[1;j], [1;-j]}. In some embodiments, two values ​​in each vector of the first or second set may be mapped to two of the eight elements, and zeros may be mapped to the other six elements in a column or row of the precoding matrix. For example, Table 27 below shows an example of a set of length-2 vectors. In some embodiments, for two columns or rows of the first set, and / or for one or two columns or rows of the second set, and / or for one or two columns or rows of the third set, and / or for one or two columns or rows of the fourth set, the two vectors selected to map to the two non-zero values ​​on two of the eight elements in each column or row may be {[1;1] and [1;-1]} or {[1;j] and [1;-j]}. TIFF2025511321000348.tif14168

[0133] In some embodiments, example precoding matrices of the third set of precoding matrices corresponding to five layers are: TIFF2025511321000349.tif50150 or TIFF2025511321000350.tif50150. For example, rows or columns may be swapped. For example, each of [a1, a2] and [b1, b2] may be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, each of [c1, c2] and [d1, d2] may be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, [e1, e2] may be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, [a1, a2] and [b1, b2] may be [1; 1] and [1; -1], respectively. For another example, [a1, a2] and [b1, b2] may be [1; j] and [1; -j], respectively. For example, [c1,c2] and [d1,d2] may be [1;1] and [1;-1], respectively. For another example, [c1,c2] and [d1,d2] may be [1;j] and [1;-j], respectively. For example, [c1,c2], [d1,d2], and [e1,e2] may be any one of [1;1], [1;-1], [1;j], and [1;-j].

[0134] In some embodiments, if the number of layers is indicated as 5 for the terminal device 110-1, there may be a fourth set of precoding matrices (e.g., a fourth set of non-coherent precoding matrices) corresponding to the five layers. For example, each of the eight antenna ports may be non-coherent with respect to one another. In some embodiments, there may be a fourth set of precoding matrices (e.g., a fourth set of non-coherent precoding matrices) represented as, for example, "Set_n5_1," and the size of the precoding matrix may be 5x8 or 8x5. In some embodiments, there may be five columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the precoding matrix, one element of the eight elements in the precoding matrix may have a non-zero value. For example, the non-zero value may be 1. The values ​​of the other seven elements in the precoding matrix may be 0. In some embodiments, for each of the five columns or rows in the precoding matrix, the non-zero value may be mapped to one of eight elements, and 0 may be mapped to the other seven elements. For example, the index of an element having a non-zero value may be different in each row or column of the precoding matrix. For example, the index of an element having a non-zero value may be idx_1, idx_2, idx_3, idx_4, and idx_5 for the first, second, third, fourth, and fifth columns or rows of the precoding matrix, respectively, and for each of idx_1, idx_2, idx_3, idx_4, and idx_5, the value may be one of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. For example, the values ​​of idx_1, idx_2, idx_3, idx_4, and idx_5 may be 0, 1, 2, 3, and 4, respectively. For another example, the values ​​of idx_1, idx_2, idx_3, idx_4, and idx_5 may be 1, 2, 3, 4, and 5, respectively.For example, the values ​​of idx_1, idx_2, idx_3, idx_4, and idx_5 may be different from each other.

[0135] In some embodiments, if the number of layers is indicated as five for terminal device 110-1, there may be a fourth set of precoding matrices corresponding to five layers. For example, there may be only one precoding matrix (e.g., a non-coherent precoding matrix) in the fourth set corresponding to six layers. In some embodiments, Table 28 shows an exemplary non-coherent precoding matrix. For example, the rows or columns of the precoding matrices in Table 28 may be swapped. TIFF2025511321000351.tif56168

[0136] for example, The file is TIFF2025511321000352.tif7150.

[0137] In some embodiments, when there are five layers in terminal device 110-1, a mixed partially coherent matrix may be supported. For example, the antenna structure may be 4+2+2, meaning that four antenna ports may be coherent, two antenna ports may be coherent, and the other two antenna ports may be coherent. In this case, r1 (e.g., 1, 2, 3, or 4) columns may be mapped with a length-4 vector, and 5-r1 columns may be mapped with a length-2 vector, with the ports swapped. Table 29 shows an exemplary mixed partially coherent precoding matrix Set_p5_3 in which the rows may be swapped. TIFF2025511321000353.tif70168

[0138] In other embodiments, the antenna structure may be 4+1+1+1+1, meaning that four antenna ports may be coherent. In this case, r1 (e.g., 1 or 2 or 3 or 4) columns may have length-4 vectors, the 5-r1 columns may have 1 on one element, and the rows may be permuted. Table 26 shows an exemplary mixed partially coherent precoding matrix Set_p5_4, in which the rows may be permuted. TIFF2025511321000354.tif43168

[0139] In some embodiments, the antenna structure may be 4+2+1+1, meaning that four antenna ports may be coherent and two antenna ports may be coherent. For example, r1 (e.g., 1 or 2 or 3 or 4) columns may have length-4 vectors, r2 (e.g., 0, 1, 2) columns may have length-2 vectors, and 5-r1-r2 columns may have 1 in one element. Table 27 shows an exemplary mixed partially coherent precoding matrix Set_p5_5, in which rows may be swapped. TIFF2025511321000355.tif86168

[0140] In some other embodiments, the antenna structure may be 2+2+1+1+1+1, meaning that two antenna ports may be coherent and two antenna ports may be coherent. For example, r1 (e.g., one or two or three or four) columns may have a length-2 vector, and 5-r1 columns may have a 1 on one element. Table 28 shows an exemplary mixed partially coherent precoding matrix Set_p5_6 in which rows may be swapped. In some other embodiments, the antenna structure may be 2+1+1+1+1+1+1. Alternatively, the antenna structure may be 2+2+2+1+1. TIFF2025511321000356.tif45168

[0141] In some embodiments, terminal device 110-1 may have a first set of precoding matrices (e.g., a first set of fully coherent precoding matrices) corresponding to the four layers, where the number of layers is denoted as four. In some embodiments, the fully coherent precoding matrices may be It may be represented as TIFF2025511321000357.tif10150.

[0142] In some embodiments, TIFF2025511321000358.tif10150 It could also be TIFF2025511321000359.tif18127.

[0143] In some embodiments, P may be 8 or 12 or 16. TIFF2025511321000360.tif6150 can be a non-negative integer. For example, TIFF2025511321000361.tif7150. Another example: TIFF2025511321000362.tif7150. Another example: TIFF2025511321000363.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000364.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000365.tif6150 may be 0 or 1. In some embodiments, TIFF2025511321000366.tif6150 can be a non-negative integer. For example, TIFF2025511321000367.tif7150. Another example: TIFF2025511321000368.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000369.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000370.tif6150 can be 0 or 1. For another example, TIFF2025511321000371.tif6150 may be 0. In some embodiments, TIFF2025511321000372.tif6150 can be a non-negative integer. For example, TIFF2025511321000373.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000374.tif6150 can be 0 or 1. For another example, TIFF2025511321000375.tif6150 can be 0 or 2. For another example, TIFF2025511321000376.tif6150 may be 0. In some embodiments, TIFF2025511321000377.tif7150. In some embodiments, TIFF2025511321000378.tif7150. In some embodiments, TIFF2025511321000379.tif6150 can be a non-negative integer. For example, TIFF2025511321000380.tif6150 is {0, TIFF2025511321000381.tif6150, TIFF2025511321000382.tif7150, TIFF2025511321000383.tif7150}. TIFF2025511321000384.tif6150 may be 0. In some embodiments, TIFF2025511321000385.tif6150 can be a non-negative integer. For example, TIFF2025511321000386.tif6150 is {0, TIFF2025511321000387.tif6150}. In some embodiments, TIFF2025511321000388.tif6150 may be 0.

[0144] In some embodiments, the parameter TIFF2025511321000389.tif6150 may also be present. TIFF2025511321000390.tif6150 and / or The value of TIFF2025511321000391.tif6150 is It may be based on the value of TIFF2025511321000392.tif6150, TIFF2025511321000393.tif6150 can be a non-negative integer. For example, TIFF2025511321000394.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000395.tif6150 can be 0 or 1. For another example, TIFF2025511321000396.tif6150 may be 0. In some embodiments, TIFF2025511321000397.tif7150 and In the case of TIFF2025511321000398.tif7150, In the case of TIFF2025511321000399.tif7150, TIFF2025511321000400.tif7150 and / or TIFF2025511321000401.tif7150. In some embodiments, TIFF2025511321000402.tif7150 and In the case of TIFF2025511321000403.tif7150, In the case of TIFF2025511321000404.tif7150, TIFF2025511321000405.tif7150 and / or TIFF2025511321000406.tif7150. In some embodiments, TIFF2025511321000407.tif7150 and In the case of TIFF2025511321000408.tif7150, In the case of TIFF2025511321000409.tif7150, TIFF2025511321000410.tif7150 and / or TIFF2025511321000411.tif7150. In some embodiments, TIFF2025511321000412.tif7150 and In the case of TIFF2025511321000413.tif7150, In the case of TIFF2025511321000414.tif7150, TIFF2025511321000415.tif7150 and / or TIFF2025511321000416.tif7150. In some embodiments, TIFF2025511321000417.tif7150 and In the case of TIFF2025511321000418.tif7150, In the case of TIFF2025511321000419.tif7150, TIFF2025511321000420.tif7150 and / or TIFF2025511321000421.tif7150. In some embodiments, TIFF2025511321000422.tif7150 and In the case of TIFF2025511321000423.tif7150, In the case of TIFF2025511321000424.tif7150, TIFF2025511321000425.tif7150 and / or The file is TIFF2025511321000426.tif7150.

[0145] In some embodiments, there may be two or more subsets of precoding matrices corresponding to the four layers. In some embodiments, the first set of precoding matrices corresponding to the four layers may include two or more subsets. For example, there may be two, three, or four subsets of precoding matrices.

[0146] In some embodiments, there may be a first subset of precoding matrices corresponding to four layers, and corresponding to the first subset of precoding matrices, the value of "N1" may be 4, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the first subset, TIFF2025511321000427.tif17150. In some embodiments, corresponding to the first subset: TIFF2025511321000428.tif6150 and TIFF2025511321000429.tif6150 may be 0. In some embodiments, corresponding to the first subset, TIFF2025511321000430.tif7150. In some embodiments, corresponding to the first subset: TIFF2025511321000431.tif6150 may be a non-negative integer, TIFF2025511321000432.tif7150. For example, TIFF2025511321000433.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000434.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000435.tif6150 can be 0 or 1. For another example, TIFF2025511321000436.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the first subset corresponding to four layers may be 128, 64, 32, 16, 8, 4, or 2.

[0147] In some embodiments, there may be a second subset of precoding matrices corresponding to four layers, and corresponding to the second subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 2, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 4, 2, or 1. In some embodiments, corresponding to the second subset, TIFF2025511321000437.tif17150. In some embodiments, corresponding to the second subset: TIFF2025511321000438.tif7150. In some embodiments, corresponding to the second subset: TIFF2025511321000439.tif7150. In some embodiments, corresponding to the second subset: TIFF2025511321000440.tif6150 may be a non-negative integer, TIFF2025511321000441.tif7150 For example, TIFF2025511321000442.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000443.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000444.tif6150 can be 0 or 1. For another example, TIFF2025511321000445.tif6150 may be 0 or 2. In some embodiments, corresponding to the second subset, TIFF2025511321000446.tif6150 can be a non-negative integer. For example, TIFF2025511321000447.tif7150. Another example: TIFF2025511321000448.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000449.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000450.tif6150 can be 0 or 1. For another example, TIFF2025511321000451.tif6150 may be 0. In some embodiments, the number of precoding matrices in the second subset corresponding to four layers may be 256, 128, 32, 16, 8, 4, or 2.

[0148] In some embodiments, when the number of layers is indicated as 4 in the terminal device 110-1, the first subset or the second subset of the fully coherent precoding matrix may be indicated as shown in Table 29 below. TIFF2025511321000452.tif40168

[0149] In some embodiments, N1 may be equal to 4, N2 may be equal to 1, O1 may be equal to 4 or 2 or 1, O2 may be equal to 1, and i 1,1 may be one of {0,...N1O1-1} or {0,2,4,6} or {0,4} or {0,1} or 0 or {0,...N1O1 / 2-1} or {0,2}. A first subset of precoding matrices corresponding to four layers, e.g., "Set_f4_1," may include 16 precoding matrices. In some embodiments, the first subset of precoding matrices "Set_f4_1" may include eight precoding matrices. Alternatively, the first subset of precoding matrices "Set_f4_1" may include four precoding matrices. In other embodiments, the first subset of precoding matrices "Set_f4_1" may include two precoding matrices.

[0150] Alternatively, N1 may be equal to 2, N2 may be equal to 2, O1 may be equal to 1 or 2 or 4, O2 may be equal to 1 or 2 or 4, and i 1,3 may be 0, 1, 2, or 3, and i 1,1 or i 1,2 may be one of {0,...3} or {0,2} or 0. In some embodiments, the second subset of precoding matrices corresponding to four layers, e.g., "Set_f4_2," may include 32 precoding matrices. Alternatively, the second subset of precoding matrices "Set_f4_2" may include eight precoding matrices. In other embodiments, the second subset of precoding matrices "Set_f4_2" may include two precoding matrices.

[0151] In some embodiments, the second factor TIFF2025511321000453.tif6150. In some embodiments, TIFF2025511321000454.tif9150. In some embodiments, TIFF2025511321000455.tif6150 can be a non-negative integer. For example, TIFF2025511321000456.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000457.tif6150 can be 0 or 1. For another example, TIFF2025511321000458.tif6150 can be 0 or 2. For another example, TIFF2025511321000459.tif6150 may be 0.

[0152] In some embodiments, there may be a third or fourth subset of precoding matrices in terminal device 110-1 when the number of layers is indicated as four. TIFF2025511321000460.tif6150. In some embodiments, TIFF2025511321000461.tif12150. In some embodiments, TIFF2025511321000462.tif6150 can be a non-negative integer. For example, TIFF2025511321000463.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000464.tif6150 can be 0 or 1. For another example, TIFF2025511321000465.tif6150 can be 0 or 2. For another example, TIFF2025511321000466.tif6150 may be 0.

[0153] In some embodiments, the third vector TIFF2025511321000467.tif9150. In some embodiments, TIFF2025511321000468.tif16150. In some embodiments, the fourth vector TIFF2025511321000469.tif9150. In some embodiments, TIFF2025511321000470.tif16150. In some embodiments, TIFF2025511321000471.tif7150 and TIFF2025511321000472.tif7150, TIFF2025511321000473.tif17150. In some embodiments, TIFF2025511321000474.tif6150 can be a non-negative integer. For example, TIFF2025511321000475.tif7150. Another example: TIFF2025511321000476.tif6150 may be at least one of {0, 2}. TIFF2025511321000477.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000478.tif6150 can be 0 or 1. For example, The value of TIFF2025511321000479.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000480.tif6150 may be 0. For example, The value of TIFF2025511321000481.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000482.tif6150 may be 0.

[0154] In some embodiments, the parameter TIFF2025511321000483.tif6150 may also be present. TIFF2025511321000484.tif6150 and / or The value of TIFF2025511321000485.tif6150 is It may be based on the value of TIFF2025511321000486.tif6150, TIFF2025511321000487.tif6150 can be a non-negative integer. For example, TIFF2025511321000488.tif6150 may be at least one of {0, 1}. TIFF2025511321000489.tif6150 may be 0. In some embodiments, TIFF2025511321000490.tif7150 and In the case of TIFF2025511321000491.tif7150, In the case of TIFF2025511321000492.tif7150, TIFF2025511321000493.tif7150 and / or The file is TIFF2025511321000494.tif7150.

[0155] In some embodiments, there may be a third subset of precoding matrices corresponding to four layers, and corresponding to the third subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the third subset, TIFF2025511321000495.tif17150. In some embodiments, corresponding to a third subset: TIFF2025511321000496.tif6150 and TIFF2025511321000497.tif6150 may be 0. In some embodiments, corresponding to the third subset, TIFF2025511321000498.tif7150. In some embodiments, corresponding to the third subset: TIFF2025511321000499.tif6150 may be a non-negative integer, TIFF2025511321000500.tif7150. For example, TIFF2025511321000501.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000502.tif6150 can be 0 or 1. For another example, TIFF2025511321000503.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the third subset corresponding to four layers may be 64, 32, 16, 8, 4, or 2. In some embodiments, the number of layers may be indicated to terminal device 110-1 as 4, and the precoding matrices in the third subset of precoding matrices corresponding to four layers may be TIFF2025511321000504.tif10150. TIFF2025511321000505.tif10150 TIFF2025511321000506.tif16150. In some embodiments, corresponding to the third subset: TIFF2025511321000507.tif7150. In some embodiments, TIFF2025511321000508.tif6150 TIFF2025511321000509.tif6150 or 0. In some embodiments, corresponding to the third subset: TIFF2025511321000510.tif7150. In some embodiments, TIFF2025511321000511.tif6150 may be 0. In some embodiments, TIFF2025511321000512.tif6150 It could also be TIFF2025511321000513.tif6150.

[0156] In some embodiments, the fifth vector TIFF2025511321000514.tif9150. In some embodiments, TIFF2025511321000515.tif16150. In some embodiments, the sixth vector TIFF2025511321000516.tif9150. In some embodiments, TIFF2025511321000517.tif24150. In some embodiments, TIFF2025511321000518.tif7150 and TIFF2025511321000519.tif7150, TIFF2025511321000520.tif17150 In some embodiments, TIFF2025511321000521.tif6150 can be a non-negative integer. For example, TIFF2025511321000522.tif7150. Another example: TIFF2025511321000523.tif6150 may be at least one of {0, 2}. TIFF2025511321000524.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000525.tif6150 can be 0 or 1. For example, The value of TIFF2025511321000526.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000527.tif6150 may be 0. For example, The value of TIFF2025511321000528.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000529.tif6150 may be 0. For example, The value of TIFF2025511321000530.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000531.tif6150 may be 0. For example, The value of TIFF2025511321000532.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000533.tif6150 may be 0. In some embodiments, TIFF2025511321000534.tif7150. In some embodiments, TIFF2025511321000535.tif6150 TIFF2025511321000536.tif6150 or 0. In some embodiments, TIFF2025511321000537.tif7150. In some embodiments, TIFF2025511321000538.tif6150 may be 0. In some embodiments, TIFF2025511321000539.tif6150 and TIFF2025511321000540.tif6150 may be 0.

[0157] In some embodiments, there may be a fourth subset of precoding matrices corresponding to four layers, and corresponding to the fourth subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the fourth subset, TIFF2025511321000541.tif17150. In some embodiments, corresponding to the fourth subset: TIFF2025511321000542.tif6150 and TIFF2025511321000543.tif6150 may be 0. In some embodiments, corresponding to the fourth subset, TIFF2025511321000544.tif7150. In some embodiments, corresponding to the fourth subset: TIFF2025511321000545.tif6150 may be a non-negative integer, TIFF2025511321000546.tif7150. For example, TIFF2025511321000547.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000548.tif6150 can be 0 or 1. For another example, TIFF2025511321000549.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the fourth subset corresponding to four layers may be 64, 32, 16, 8, 4, or 2. In some embodiments, the number of layers may be indicated to terminal device 110-1 as 4, and the precoding matrices in the fourth subset of precoding matrices corresponding to four layers may be TIFF2025511321000550.tif10150. In some embodiments, TIFF2025511321000551.tif10150 TIFF2025511321000552.tif16150. In some embodiments, corresponding to the fourth subset: TIFF2025511321000553.tif7150. In some embodiments, TIFF2025511321000554.tif6150 TIFF2025511321000555.tif6150 or 0. In some embodiments, corresponding to the fourth subset: TIFF2025511321000556.tif7150. In some embodiments, TIFF2025511321000557.tif6150 may be 0. In some embodiments, corresponding to the fourth subset, TIFF2025511321000558.tif7150. In some embodiments, TIFF2025511321000559.tif6150 TIFF2025511321000560.tif6150 or 0. In some embodiments, corresponding to the fourth subset: TIFF2025511321000561.tif7150. In some embodiments, TIFF2025511321000562.tif6150 may be 0. In some embodiments, TIFF2025511321000563.tif6150 and TIFF2025511321000564.tif6150 may be 0. In some embodiments, TIFF2025511321000565.tif6150 TIFF2025511321000566.tif7150. In some embodiments, TIFF2025511321000567.tif6150 It could also be TIFF2025511321000568.tif7150.

[0158] In some embodiments, if the number of layers is shown as four for terminal device 110-1, there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to the four layers. For example, if terminal device 110-1 has eight antenna ports, or if the PUSCH transmission of terminal device 110-1 is associated with eight antenna ports, or if the PUSCH transmission of terminal device 110-1 is associated with an SRS with eight ports, four antenna ports (e.g., four ports in the first set) may be coherent and the other four antenna ports (e.g., four ports in the second set) may be coherent. For example, the four ports in the first set may not be coherent with the four ports in the second set. In some embodiments, there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to four layers, e.g., represented as "Set_p4_1," and the size of the partially coherent precoding matrices may be 4x8 or 8x4. In some embodiments, there may be four columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the partially coherent precoding matrix, four of the eight elements in the partially coherent precoding matrix may have non-zero values. The other four elements in the partially coherent precoding matrix may have values ​​of zero. In some embodiments, there may be C2 columns or rows of four columns or rows in the precoding matrix (e.g., a first set of C2 columns or rows, e.g., C2 may be 1 or 2 or 3 or 4), and in each column, non-zero values ​​may be mapped to four of the eight elements and zeros may be mapped to the other four elements. For example, the indices of four elements with non-zero values ​​may be the same within C2 columns or rows of the first set.For example, the index of the four elements having non-zero values ​​may be idx_1, and idx_1 may be one of four values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the four values ​​of idx_1 may be based on the indexes of the four antenna ports in the first group. For example, idx_1 may be {0, 1, 2, 3} or {0, 2, 4, 6} or {1, 2, 3, 4} or {1, 3, 5, 7}. In some embodiments, 4-C2 of the length-4 vectors in the first set or the second set may be selected for the other 4-C2 columns. In some embodiments, for the other 4-C2 columns or rows (e.g., the second set of 4-C2 columns or rows) of the four columns or rows in the precoding matrix, non-zero values ​​may be mapped to four of the eight elements in each column or row, and zeros may be mapped to the other four elements. For example, the indices of the four elements with non-zero values ​​may be the same within the second set of 4-C2 columns or rows. For example, the indices of the four elements with non-zero values ​​may be idx_2, and idx_2 may be one of four values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the four values ​​of idx_2 may be based on the indices of the four antenna ports in the second group. For example, idx_2 may be {4, 5, 6, 7} or {1, 3, 5, 7} or {5, 6, 7, 8} or {2, 4, 6, 8}. In some embodiments, any value of idx_1 may be different from any value of idx_2. In some embodiments, C2 may be 4 and there may be no columns or rows in the second set.

[0159] In some embodiments, there may be two sets of length-4 vectors, each set including four length-4 vectors. In some embodiments, values ​​in the length-4 vectors may apply to four non-zero values ​​that map to four elements in a column or row of the precoding matrix. For example, the first set of length-4 vectors may be {[1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], [1;-1;-1;1]}. For another example, the second set of length-4 vectors may be {[1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], [1;-1;-j;j]}. In some embodiments, the four values ​​in each vector in the first or second set may map to four of the eight elements, with zeros mapping to the other four elements in a column or row of the precoding matrix. In some embodiments, Table 30 below shows an example of a set of length-4 vectors. TIFF2025511321000569.tif79168

[0160] In some embodiments, example precoding matrices of the second set of precoding matrices corresponding to four layers are: TIFF2025511321000570.tif50150 or TIFF2025511321000571.tif50150 or TIFF2025511321000572.tif50150 or TIFF2025511321000573.tif50150. For example, rows or columns may be swapped. For example, rows or columns may be swapped. For example, each of [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be one of the length-4 vectors in the first set of length-4 vectors or in the second set of length-4 vectors. For example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1], respectively. For another example, [a1, a2, a3, a4], [b1, b2, b3, b4], [c1, c2, c3, c4], and [d1, d2, d3, d4] may be [1; 1; j; j], [1; -1; j; -j], [1; 1; -j; -j], and [1; -1; -j; j], respectively. For example, each of [a1, a2, a3, a4], [b1, b2, b3, b4], and [c1, c2, c3, c4] may be one of the length-4 vectors in the first set of length-4 vectors or the second set of length-4 vectors. For example, [d1, d2, d3, d4] may be one of the length-4 vectors in the first set of length-4 vectors or the second set of length-4 vectors. For example, [a1, a2, a3, a4] and [b1, b2, b3, b4] may be two vectors selected from [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1]. For example, [a1, a2, a3, a4] and [b1, b2, b3, b4] may be two vectors selected from [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j]. For example, [c1, c2, c3, c4] and [d1, d2, d3, d4] may be two vectors selected from [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1]. For example, [c1, c2, c3, c4], [d1, d2, d3, d4] may be two vectors from [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j].

[0161] In some embodiments, TIFF2025511321000574.tif6150 may be a positive integer. For example, TIFF2025511321000575.tif7150. For example, TIFF2025511321000576.tif6150 can be 64 or 32 or 16 or 8 or 4 or 2 or 32 or 16 or 8.

[0162] In some embodiments, a third subset of fully coherent precoding matrices corresponding to four layers may be shown as Table 31 below. TIFF2025511321000577.tif47168

[0163] In some embodiments, N g may be equal to 2, N1 may be equal to 2, N2 may be equal to 1, O1 may be equal to 2 or 4, and i 1,3 may be 0, and i 1,1 may be one of {0,…N1O1-1} or {0, 2, 4, 6} or {0, 4} or {0,2} or {0,1} or 0, or i 1,4,1may be one of {0, 1, 2, 3}, {0, 2}, or 0. In some embodiments, a third subset of precoding matrices corresponding to four layers, e.g., "Set_f4_3," may include 64 precoding matrices. In some embodiments, the third subset of precoding matrices "Set_f4_3" may include 32 precoding matrices. The third subset of precoding matrices "Set_f4_3" may include 16 precoding matrices. In some embodiments, the third subset of precoding matrices "Set_f4_3" may include 8 precoding matrices. Alternatively, the third subset of precoding matrices "Set_f4_3" may include 4 precoding matrices. In other embodiments, the third subset of precoding matrices "Set_f4_3" may include 2 precoding matrices.

[0164] In some embodiments, a fourth subset of fully coherent precoding matrices corresponding to four layers may be shown as Table 32 below. TIFF2025511321000578.tif39168

[0165] In some embodiments, N g may be equal to 2, N1 may be equal to 2, N2 may be equal to 1, O1 may be equal to 2 or 4, and i 1,3 may be 0, and i 1,1 may be one of {0,…N1O1-1} or {0, 2, 4, 6} or {0, 4} or {0,2} or {0,1}, or i 1,4,qmay be one of {0, 1, 2, 3} or {0, 2} or 0, where q may be 0 or 1. In some embodiments, a fourth subset of precoding matrices corresponding to four layers, for example, "Set_f4_4," may include 256 precoding matrices. In some embodiments, the fourth subset of precoding matrices "Set_f4_4" may include 128 precoding matrices. In some embodiments, the fourth subset of precoding matrices "Set_f4_4" may include 64 precoding matrices. In some embodiments, the fourth subset of precoding matrices "Set_f4_4" may include 32 precoding matrices. The fourth subset of precoding matrices "Set_f4_4" may include 16 precoding matrices. In some embodiments, the fourth subset of precoding matrices "Set_f4_4" may include 8 precoding matrices. Alternatively, the fourth subset of precoding matrices "Set_f4_4" may include four precoding matrices. In other embodiments, the fourth subset of precoding matrices "Set_f4_4" may include two precoding matrices.

[0166] In some embodiments, if the number of layers is indicated as four for the terminal device 110-1, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) corresponding to four layers. For example, the eight-port structure may be 2+2+2+2, meaning that there are four groups, each group includes two antenna ports, and in each group, the two antenna ports may be coherent. For example, antenna ports may not be coherent between groups. In some embodiments, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) represented as, for example, "Set_p4_2," and the size of the precoding matrix may be 4x8 or 8x4. In some embodiments, there may be four columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the precoding matrix, two of the eight elements in the precoding matrix may have non-zero values. The values ​​of the other six elements in the precoding matrix may be 0. In some embodiments, there may be one or two columns or rows (e.g., one or two columns or rows in the first set) of four columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and 0 may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within one or two columns or rows of the first set. For example, the indices of two elements with non-zero values ​​may be idx_1, where idx_1 may be two values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_1 may be based on the indices of two antenna ports from the four antenna ports in the first group.In some embodiments, the two values ​​of idx_1 may be based on the indices of two antenna ports in the third group. For example, idx_1 may be {0, 1} or {0, 2} or {1, 2} or {1, 3} or {0, 4} or {1, 5}. In some embodiments, there may be one or two columns or rows (e.g., one or two columns or rows of the second set) of four columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and zero may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within one or two columns or rows of the second set. For example, the indices of two elements with non-zero values ​​may be idx_2, and idx_2 may be two values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_2 may be based on the indexes of the remaining two antenna ports among the four antenna ports in the first group. In some embodiments, the two values ​​of idx_2 may be based on the indexes of the two antenna ports in the fourth group. For example, idx_2 may be {2, 3} or {1, 3} or {3, 4} or {2, 4} or {1, 5} or {2, 6}. In some embodiments, there may be one or two columns or rows (e.g., one or two columns or rows of a third set) among the four columns or rows in the precoding matrix, and in each column or row, non-zero values ​​may be mapped to two of the eight elements, and zeros may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within one or two columns or rows of the third set. For example, the index of the two elements having non-zero values ​​may be idx_3, and idx_3 may be two values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_3 may be based on the indexes of two antenna ports of the four antenna ports in the second group.In some embodiments, the two values ​​of idx_3 may be based on the indices of two antenna ports in the fifth group. For example, idx_3 may be {4, 5} or {4, 6} or {5, 6} or {5, 7} or {2, 6} or {3, 7}. In some embodiments, there may be one or two columns or rows (e.g., one or two columns or rows in the fourth set) out of four columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and zero may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within one or two columns or rows in the fourth set. For example, the indices of two elements with non-zero values ​​may be idx_4, and idx_4 may be two values ​​out of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_4 may be based on the indexes of the remaining two antenna ports among the four antenna ports in the second group. In some embodiments, the two values ​​of idx_4 may be based on the indexes of the two antenna ports in the sixth group. For example, idx_4 may be {6, 7} or {5, 7} or {7, 8} or {6, 8} or {3, 7} or {4, 8}. In some embodiments, any value of idx_1, any value of idx_2, any value of idx_3, and any value of idx_4 may be different from each other. In some embodiments, the total number of columns or rows in the first set, second set, third set, and / or fourth set may be four. In some embodiments, there may be a first set and a second set, each set having two columns or rows. In some embodiments, there may be a first set, a second set, and a third set, where two of the three sets each have two columns or rows, and one of the three sets has one column or row. In some embodiments, there may be a first set, a second set, a third set, and a fourth set, where each set has one column or row.

[0167] In some embodiments, there may be a set of four length-2 vectors, each of which may be applied as two non-zero values ​​in a column or row of the precoding matrix. In some embodiments, for a third set of precoding matrices corresponding to four layers, e.g., Set_p4_2, two length-2 vectors may be selected from the four length-2 vectors, and the two values ​​in each vector may be mapped to two of the eight elements, with 0 being mapped to the other element in a column or row of the precoding matrix. In some embodiments, there may be two sets of length-2 vectors, each set including two length-2 vectors. In some embodiments, the two values ​​in a length-2 vector may be applied as two non-zero values ​​mapped to two elements in a column or row of the precoding matrix. For example, the first set of length-2 vectors may be {[1;1], [1;-1]}. For another example, the second set of length-2 vectors may be {[1;j], [1;-j]}. In some embodiments, two values ​​in each vector of the first or second set may be mapped to two of the eight elements, and zeros may be mapped to the other six elements in a column or row of the precoding matrix. For example, Table 33 below shows an example of a set of length-2 vectors. In some embodiments, for two columns or rows of the first set, and / or for one or two columns or rows of the second set, and / or for one or two columns or rows of the third set, and / or for one or two columns or rows of the fourth set, the two vectors selected to map to the two non-zero values ​​on two of the eight elements in each column or row may be {[1;1] and [1;-1]} or {[1;j] and [1;-j]}. TIFF2025511321000579.tif12168

[0168] In some embodiments, example precoding matrices of the third set of precoding matrices corresponding to four layers are: TIFF2025511321000580.tif50150 or TIFF2025511321000581.tif50150 or TIFF2025511321000582.tif50150. For example, rows or columns may be swapped. For example, each of [a1, a2] and [b1, b2] may be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, each of [c1, c2] and [d1, d2] may be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, [a1, a2] and [b1, b2] may be [1; 1] and [1; -1], respectively. For another example, [a1, a2] and [b1, b2] may be [1; j] and [1; -j], respectively. For example, [c1, c2] and [d1, d2] may be [1; 1] and [1; -1], respectively. For another example, [c1,c2] and [d1,d2] may be [1;j] or [1;-j], respectively. For example, [a1,a2], [b1,b2], [c1,c2], and [d1,d2] may be any one of [1;1], [1;-1], [1;j], and [1;-j].

[0169] In some embodiments, if the number of layers is indicated as four for the terminal device 110-1, there may be a fourth set of precoding matrices (e.g., a fourth set of noncoherent precoding matrices) corresponding to the four layers. For example, each of the eight antenna ports may be noncoherent with respect to one another. In some embodiments, there may be a fourth set of precoding matrices (e.g., a fourth set of noncoherent precoding matrices) represented as, for example, "Set_n4_1," and the size of the precoding matrix may be 4×8 or 8×4. In some embodiments, there may be four columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the precoding matrix, one element of the eight elements in the precoding matrix may have a nonzero value. For example, the nonzero value may be 1. The values ​​of the other seven elements in the precoding matrix may be 0. In some embodiments, for each of the four columns or rows in the precoding matrix, the non-zero value may be mapped to one of eight elements, and 0 may be mapped to the other seven elements. For example, the index of an element having a non-zero value may be different in each row or column of the precoding matrix. For example, the index of an element having a non-zero value may be idx_1, idx_2, idx_3, and idx_4 for the first, second, third, and fourth columns or rows of the precoding matrix, respectively, and for each of idx_1, idx_2, idx_3, and idx_4, the value may be one of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. For example, the values ​​of idx_1, idx_2, idx_3, and idx_4 may be {0,1,2,3} or {0,2,4,6} or {4,5,6,7} or {1,3,5,7}, respectively.For example, the values ​​of idx_1, idx_2, idx_3, and idx_4 may be {1,2,3,4}, or {5,6,7,8}, or {1,3,5,7}, or {2,4,6,8}, respectively. For example, the values ​​of idx_1, idx_2, idx_3, and idx_4 may be different from each other. In some embodiments, the values ​​of idx_1, idx_2, idx_3, and idx_4 may be based on the indexes of the four antenna ports in the first group or the second group.

[0170] In some embodiments, if the number of layers is indicated as four for terminal device 110-1, there may be a fourth set of precoding matrices corresponding to the four layers. For example, there may be one, two, or four precoding matrices (e.g., non-coherent precoding matrices) in the fourth set corresponding to the four layers. In some embodiments, Table 34 shows exemplary non-coherent precoding matrices. TIFF2025511321000583.tif56168

[0171] for example, The file is TIFF2025511321000584.tif7150.

[0172] In some embodiments, when there are four layers in terminal device 110-1, a mixed partially coherent matrix may be supported. For example, the antenna structure may be 4+2+2, meaning that four antenna ports may be coherent, two antenna ports may be coherent, and the other two antenna ports may be coherent. In this case, r1 (e.g., 1, 2, or 3) columns may be mapped with a length-4 vector, and 4-r1 columns may be mapped with a length-2 vector, with the ports swapped. Table 35 shows an exemplary mixed partially coherent precoding matrix Set_p4_3 in which the rows may be swapped. TIFF2025511321000585.tif46168

[0173] In other embodiments, the antenna structure may be 4+1+1+1+1, meaning that four antenna ports may be coherent. In this case, r1 (e.g., one, two, or three) columns may have length-4 vectors, the 4-r1 columns may have 1 on one element, and the rows may be permuted. Table 36 shows an exemplary mixed partially coherent precoding matrix Set_p4_4, in which the rows may be permuted. TIFF2025511321000586.tif62168

[0174] In some embodiments, the antenna structure may be 4+2+1+1, meaning that four antenna ports may be coherent and two antenna ports may be coherent. For example, r1 (e.g., one or two) columns may have length-4 vectors, r2 (e.g., one or two) columns may have length-2 vectors, and 4-r1-r2 columns may have a 1 in one element. Table 37 shows an exemplary mixed partially coherent precoding matrix Set_p4_5, in which rows may be swapped. TIFF2025511321000587.tif86168

[0175] In some other embodiments, the antenna structure may be 2+2+1+1+1+1, meaning that two antenna ports may be coherent and two antenna ports may be coherent. For example, r1 (e.g., one, two, or three) columns may have a length-2 vector, and 4-r1 columns may have a 1 on one element. Table 38 shows an exemplary mixed partially coherent precoding matrix Set_45_6 in which rows may be swapped. In some other embodiments, the antenna structure may be 2+1+1+1+1+1+1. Alternatively, the antenna structure may be 2+2+2+1+1. TIFF2025511321000588.tif64168

[0176] In some embodiments, terminal device 110-1 may have a first set of precoding matrices (e.g., a first set of fully coherent precoding matrices) corresponding to the three layers, where the number of layers is denoted as three. In some embodiments, the fully coherent precoding matrices are It may be represented as TIFF2025511321000589.tif10150.

[0177] In some embodiments, TIFF2025511321000590.tif10150 It could also be TIFF2025511321000591.tif16150.

[0178] In some embodiments, P may be 8 or 12 or 16. TIFF2025511321000592.tif6150 can be a non-negative integer. For example, TIFF2025511321000593.tif7150. Another example: TIFF2025511321000594.tif7150. Another example: TIFF2025511321000595.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000596.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000597.tif6150 may be 0 or 1. In some embodiments, TIFF2025511321000598.tif6150 can be a non-negative integer. For example, TIFF2025511321000599.tif7150. Another example: TIFF2025511321000600.tif6150 may be at least one of {0, 2, 4, 6, 8}. TIFF2025511321000601.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000602.tif6150 can be 0 or 1. For another example, TIFF2025511321000603.tif6150 may be 0. In some embodiments, TIFF2025511321000604.tif6150 can be a non-negative integer. For example, TIFF2025511321000605.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000606.tif6150 can be 0 or 1. For another example, TIFF2025511321000607.tif6150 can be 0 or 2. For another example, TIFF2025511321000608.tif6150 may be 0. In some embodiments, TIFF2025511321000609.tif7150. In some embodiments, TIFF2025511321000610.tif7150. In some embodiments, TIFF2025511321000611.tif6150 can be a non-negative integer. For example, TIFF2025511321000612.tif6150 is {0, TIFF2025511321000613.tif6150, TIFF2025511321000614.tif7150 , TIFF2025511321000615.tif7150}. TIFF2025511321000616.tif6150 may be 0. In some embodiments, TIFF2025511321000617.tif6150 can be a non-negative integer. For example, TIFF2025511321000618.tif6150 is {0, TIFF2025511321000619.tif6150}. In some embodiments, TIFF2025511321000620.tif6150 may be 0.

[0179] In some embodiments, the parameter TIFF2025511321000621.tif6150 may also be present. TIFF2025511321000622.tif6150 and / or The value of TIFF2025511321000623.tif6150 is It may be based on the value of TIFF2025511321000624.tif6150, TIFF2025511321000625.tif6150 can be a non-negative integer. For example, TIFF2025511321000626.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000627.tif6150 can be 0 or 1. For another example, TIFF2025511321000628.tif6150 may be 0. In some embodiments, TIFF2025511321000629.tif7150 and In the case of TIFF2025511321000630.tif7150, In the case of TIFF2025511321000631.tif7150, TIFF2025511321000632.tif7150 and / or TIFF2025511321000633.tif7150. In some embodiments, TIFF2025511321000634.tif7150 and In the case of TIFF2025511321000635.tif7150, In the case of TIFF2025511321000636.tif7150, TIFF2025511321000637.tif7150 and / or TIFF2025511321000638.tif7150. In some embodiments, TIFF2025511321000639.tif7150 and In the case of TIFF2025511321000640.tif7150, In the case of TIFF2025511321000641.tif7150, TIFF2025511321000642.tif7150 and / or TIFF2025511321000643.tif7150. In some embodiments, TIFF2025511321000644.tif7150 and In the case of TIFF2025511321000645.tif7150, In the case of TIFF2025511321000646.tif7150, TIFF2025511321000647.tif7150 and / or TIFF2025511321000648.tif7150. In some embodiments, TIFF2025511321000649.tif7150 and In the case of TIFF2025511321000650.tif7150, In the case of TIFF2025511321000651.tif7150, TIFF2025511321000652.tif7150 and / or TIFF2025511321000653.tif7150. In some embodiments, TIFF2025511321000654.tif7150 and In the case of TIFF2025511321000655.tif7150, In the case of TIFF2025511321000656.tif7150, TIFF2025511321000657.tif7150 and / or The file is TIFF2025511321000658.tif7150.

[0180] In some embodiments, there may be two or more subsets of precoding matrices corresponding to the three layers. In some embodiments, the first set of precoding matrices corresponding to the three layers may include two or more subsets. For example, there may be two, three, or four subsets of precoding matrices.

[0181] In some embodiments, there may be a first subset of precoding matrices corresponding to three layers, and corresponding to the first subset of precoding matrices, the value of "N1" may be 4, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the first subset, TIFF2025511321000659.tif17150. In some embodiments, corresponding to the first subset: TIFF2025511321000660.tif6150 and TIFF2025511321000661.tif6150 may be 0. In some embodiments, corresponding to the first subset, TIFF2025511321000662.tif7150. In some embodiments, corresponding to the first subset: TIFF2025511321000663.tif6150 may be a non-negative integer, TIFF2025511321000664.tif7150. For example, TIFF2025511321000665.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000666.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000667.tif6150 can be 0 or 1. For another example, TIFF2025511321000668.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the first subset corresponding to the three layers may be 128, 64, 32, 16, 8, 4, or 2.

[0182] In some embodiments, there may be a second subset of precoding matrices corresponding to three layers, and corresponding to the second subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 2, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 4, 2, or 1. In some embodiments, corresponding to the second subset, TIFF2025511321000669.tif17150. In some embodiments, corresponding to the second subset: TIFF2025511321000670.tif7150. In some embodiments, corresponding to the second subset: TIFF2025511321000671.tif7150. In some embodiments, corresponding to the second subset: TIFF2025511321000672.tif6150 may be a non-negative integer, TIFF2025511321000673.tif7150. For example, TIFF2025511321000674.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000675.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000676.tif6150 can be 0 or 1. For another example, TIFF2025511321000677.tif6150 may be 0 or 2. In some embodiments, corresponding to the second subset, TIFF2025511321000678.tif6150 can be a non-negative integer. For example, TIFF2025511321000679.tif7150. Another example: TIFF2025511321000680.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000681.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000682.tif6150 can be 0 or 1. For another example, TIFF2025511321000683.tif6150 may be 0. In some embodiments, the number of precoding matrices in the second subset corresponding to the three layers may be 256, 128, 32, 16, 8, 4, or 2.

[0183] In some embodiments, terminal device 110-1 may have a third subset of precoding matrices if the number of layers is indicated as 3. In some embodiments, in some embodiments, a third vector TIFF2025511321000684.tif9150. In some embodiments, TIFF2025511321000685.tif16150. In some embodiments, the fourth vector TIFF2025511321000686.tif9150. In some embodiments, TIFF2025511321000687.tif16150. In some embodiments, TIFF2025511321000688.tif7150 and TIFF2025511321000689.tif7150, TIFF2025511321000690.tif17150. In some embodiments, TIFF2025511321000691.tif6150 can be a non-negative integer. For example, TIFF2025511321000692.tif7150. Another example: TIFF2025511321000693.tif6150 may be at least one of {0, 2}. TIFF2025511321000694.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000695.tif6150 can be 0 or 1. For example, The value of TIFF2025511321000696.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000697.tif6150 may be 0. For example, The value of TIFF2025511321000698.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000699.tif6150 may be 0.

[0184] In some embodiments, the parameter TIFF2025511321000700.tif6150 may also be present. TIFF2025511321000701.tif6150 and / or The value of TIFF2025511321000702.tif6150 is It may be based on the value of TIFF2025511321000703.tif6150, TIFF2025511321000704.tif6150 can be a non-negative integer. For example, TIFF2025511321000705.tif6150 may be at least one of {0, 1}. TIFF2025511321000706.tif6150 may be 0. In some embodiments, TIFF2025511321000707.tif7150 and In the case of TIFF2025511321000708.tif7150, In the case of TIFF2025511321000709.tif7150, TIFF2025511321000710.tif7150 and / or The file is TIFF2025511321000711.tif7150.

[0185] In some embodiments, there may be a third subset of precoding matrices corresponding to three layers, and corresponding to the third subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the third subset, TIFF2025511321000712.tif17150. In some embodiments, corresponding to the third subset: TIFF2025511321000713.tif6150 and TIFF2025511321000714.tif6150 may be 0. In some embodiments, corresponding to the third subset, TIFF2025511321000715.tif7150. In some embodiments, corresponding to a third subset: TIFF2025511321000716.tif6150 may be a non-negative integer, TIFF2025511321000717.tif7150. For example, TIFF2025511321000718.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000719.tif6150 can be 0 or 1. For another example, TIFF2025511321000720.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the third subset corresponding to the three layers may be 64, 32, 16, 8, 4, or 2.

[0186] In some embodiments, the number of layers may be indicated as three to terminal device 110-1, and the precoding matrices in the third subset of precoding matrices corresponding to the three layers may be TIFF2025511321000721.tif10150. TIFF2025511321000722.tif10150 TIFF2025511321000723.tif16150. In some embodiments, corresponding to the third subset: TIFF2025511321000724.tif7150. In some embodiments, TIFF2025511321000725.tif6150 TIFF2025511321000726.tif6150 or 0. In some embodiments, corresponding to the third subset: TIFF2025511321000727.tif7150. In some embodiments, TIFF2025511321000728.tif6150 may be 0. In some embodiments, TIFF2025511321000729.tif6150 It could also be TIFF2025511321000730.tif6150.

[0187] In some embodiments, terminal device 110-1 may have a fourth subset of precoding matrices if the number of layers is indicated as 3. In some embodiments, a fifth vector TIFF2025511321000731.tif9150. In some embodiments, TIFF2025511321000732.tif16150. In some embodiments, the sixth vector TIFF2025511321000733.tif9150. In some embodiments, TIFF2025511321000734.tif24150. In some embodiments, TIFF2025511321000735.tif7150 and TIFF2025511321000736.tif7150, TIFF2025511321000737.tif17150 In some embodiments, TIFF2025511321000738.tif6150 can be a non-negative integer. For example, TIFF2025511321000739.tif7150. Another example: TIFF2025511321000740.tif6150 may be at least one of {0, 2}. TIFF2025511321000741.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000742.tif6150 can be 0 or 1. For example, The value of TIFF2025511321000743.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000744.tif6150 may be 0. For example, The value of TIFF2025511321000745.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000746.tif6150 may be 0. For example, The value of TIFF2025511321000747.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000748.tif6150 may be 0. For example, The value of TIFF2025511321000749.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000750.tif6150 may be 0. In some embodiments, TIFF2025511321000751.tif7150. In some embodiments, TIFF2025511321000752.tif6150 TIFF2025511321000753.tif6150 or 0. In some embodiments, TIFF2025511321000754.tif7150. In some embodiments, TIFF2025511321000755.tif6150 may be 0. In some embodiments, TIFF2025511321000756.tif6150 and TIFF2025511321000757.tif6150 may be 0.

[0188] In some embodiments, there may be a fourth subset of precoding matrices corresponding to three layers, and corresponding to the fourth subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the fourth subset, TIFF2025511321000758.tif17150. In some embodiments, corresponding to the fourth subset: TIFF2025511321000759.tif6150 and TIFF2025511321000760.tif6150 may be 0. In some embodiments, corresponding to the fourth subset, TIFF2025511321000761.tif7150. In some embodiments, corresponding to the fourth subset: TIFF2025511321000762.tif6150 may be a non-negative integer, TIFF2025511321000763.tif7150. For example, TIFF2025511321000764.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000765.tif6150 can be 0 or 1. For another example, TIFF2025511321000766.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the fourth subset corresponding to three layers may be 64, 32, 16, 8, 4, or 2.

[0189] In some embodiments, the number of layers may be indicated as three to terminal device 110-1, and the precoding matrices in the fourth subset of precoding matrices corresponding to the three layers may be TIFF2025511321000767.tif10150. TIFF2025511321000768.tif10150 TIFF2025511321000769.tif16150. In some embodiments, corresponding to the fourth subset: TIFF2025511321000770.tif7150. In some embodiments, TIFF2025511321000771.tif6150 TIFF2025511321000772.tif6150 or 0. In some embodiments, corresponding to the fourth subset: TIFF2025511321000773.tif7150. In some embodiments, TIFF2025511321000774.tif6150 may be 0. In some embodiments, corresponding to the fourth subset, TIFF2025511321000775.tif7150. In some embodiments, TIFF2025511321000776.tif6150 TIFF2025511321000777.tif6150 or 0. In some embodiments, corresponding to the fourth subset: TIFF2025511321000778.tif7150. In some embodiments, TIFF2025511321000779.tif6150 may be 0. In some embodiments, TIFF2025511321000780.tif6150 and TIFF2025511321000781.tif6150 may be 0. In some embodiments, TIFF2025511321000782.tif6150 TIFF2025511321000783.tif7150. In some embodiments, TIFF2025511321000784.tif6150 It could also be TIFF2025511321000785.tif7150.

[0190] In some embodiments, if the number of layers is shown as three for terminal device 110-1, there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to the three layers. For example, if terminal device 110-1 has eight antenna ports, or if the PUSCH transmission of terminal device 110-1 is associated with eight antenna ports, or if the PUSCH transmission of terminal device 110-1 is associated with an SRS with eight ports, four antenna ports (e.g., four ports in the first set) may be coherent and the other four antenna ports (e.g., four ports in the second set) may be coherent. For example, the four ports in the first set may not be coherent with the four ports in the second set. In some embodiments, there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to three layers, e.g., represented as "Set_p3_1," and the size of the partially coherent precoding matrices may be 3x8 or 8x3. In some embodiments, there may be three columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the partially coherent precoding matrix, four of the eight elements in the partially coherent precoding matrix may have non-zero values. The other four elements in the partially coherent precoding matrix may have values ​​of zero. In some embodiments, there may be C3 columns or rows of three columns or rows in the precoding matrix (e.g., a first set of C3 columns or rows, e.g., C3 may be 1, 2, or 3), and in each column, non-zero values ​​may be mapped to four of the eight elements and zeros may be mapped to the other four elements. For example, the indices of four elements with non-zero values ​​may be the same within C3 columns or rows of the first set.For example, the index of the four elements having non-zero values ​​may be idx_1, and idx_1 may be one of four values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the four values ​​of idx_1 may be based on the indexes of the four antenna ports in the first group or the second group. For example, idx_1 may be {0, 1, 2, 3} or {0, 2, 4, 6} or {1, 2, 3, 4} or {1, 3, 5, 7}. In some embodiments, 3-C3 of the length-4 vectors of the first set or the second set may be selected for the other 3-C3 columns. In some embodiments, for the other 3-C3 columns or rows (e.g., the second set of 3-C3 columns or rows) of the three columns or rows in the precoding matrix, non-zero values ​​may be mapped to four of the eight elements in each column or row, and zeros may be mapped to the other four elements. For example, the indices of the four elements with non-zero values ​​may be the same within the second set of 3-C3 columns or rows. For example, the indices of the four elements with non-zero values ​​may be idx_2, where idx_2 may be one of four values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the four values ​​of idx_2 may be based on the indices of the four antenna ports in the first group or the second group. For example, idx_2 may be {4, 5, 6, 7} or {1, 3, 5, 7} or {5, 6, 7, 8} or {2, 4, 6, 8}. In some embodiments, any value of idx_1 may be different from any value of idx_2. In some embodiments, C3 may be 3 and there may be no second set of columns or rows.

[0191] In some embodiments, there may be two sets of length-4 vectors, each set including four length-4 vectors. In some embodiments, values ​​in the length-4 vectors may apply to four non-zero values ​​that map to four elements in a column or row of the precoding matrix. For example, the first set of length-4 vectors may be {[1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], [1;-1;-1;1]}. For another example, the second set of length-4 vectors may be {[1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], [1;-1;-j;j]}. In some embodiments, the four values ​​in each vector of the first or second set may map to four of the eight elements, and zeros may map to the other four elements in a column or row of the precoding matrix. In some embodiments,

[0192] In some embodiments, example precoding matrices of the second set of precoding matrices corresponding to the three layers are: TIFF2025511321000786.tif50150 or TIFF2025511321000787.tif50150 or TIFF2025511321000788.tif50150. For example, rows or columns may be swapped. For example, rows or columns may be swapped. For example, each of [a1, a2, a3, a4], [b1, b2, b3, b4], and [c1, c2, c3, c4] may be one of the length-4 vectors in the first set of length-4 vectors or the second set of length-4 vectors. For example, [a1, a2, a3, a4], [b1, b2, b3, b4], and [c1, c2, c3, c4] may be three of [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1]. For example, [a1, a2, a3, a4], [b1, b2, b3, b4], and [c1, c2, c3, c4] may be three of [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j]. For example, each of [a1, a2, a3, a4], [b1, b2, b3, b4], and [c1, c2, c3, c4] may be one of length-4 vectors in the first set of length-4 vectors or in the second set of length-4 vectors. For example, [a1, a2, a3, a4] and [b1, b2, b3, b4] may be two of [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1]. For example, [a1, a2, a3, a4] and [b1, b2, b3, b4] may be two of [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j]. For example, [c1, c2, c3, c4] may be one vector of [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1]. For example, [c1, c2, c3, c4] may be one vector of [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j].

[0193] In some embodiments, TIFF2025511321000789.tif6150 may be a positive integer. For example, TIFF2025511321000790.tif7150. For example, TIFF2025511321000791.tif6150 can be 64 or 32 or 16 or 8 or 4 or 2 or 24 or 12 or 6 or 3.

[0194] In some embodiments, if the number of layers is indicated as three for the terminal device 110-1, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) corresponding to three layers. For example, the eight-port structure may be 2+2+2+2, meaning that there are four groups, each group includes two antenna ports, and in each group, the two antenna ports may be coherent. For example, antenna ports may not be coherent between groups. In some embodiments, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) represented as, for example, "Set_p3_2," and the size of the precoding matrix may be 3×8 or 8×3. In some embodiments, there may be three columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the precoding matrix, two of the eight elements in the precoding matrix may have non-zero values. The values ​​of the other six elements in the precoding matrix may be 0. In some embodiments, there may be one or two columns or rows (e.g., one or two columns or rows in the first set) of three columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and 0 may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within one or two columns or rows of the first set. For example, the indices of two elements with non-zero values ​​may be idx_1, where idx_1 may be two values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_1 may be based on the indices of two of the four antenna ports in the first group.In some embodiments, the two values ​​of idx_1 may be based on the indices of two antenna ports in the third group, the fourth group, the fifth group, or the sixth group. For example, idx_1 may be {0, 1} or {0, 2} or {1, 2} or {1, 3} or {0, 4} or {1, 5}. In some embodiments, there may be one or two columns or rows (e.g., one or two columns or rows of the second set) out of three columns or rows in the precoding matrix, and in each column or row, non-zero values ​​may be mapped to two of the eight elements, and zeros may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within one or two columns or rows of the second set. For example, the index of two elements having non-zero values ​​may be idx_2, and idx_2 may be two values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_2 may be based on the indexes of two antenna ports of four antenna ports in the first group or the second group. In some embodiments, the two values ​​of idx_2 may be based on the indexes of two antenna ports in the third group or the fourth group or the fifth group or the sixth group. For example, idx_2 may be {2, 3} or {1, 3} or {3, 4} or {2, 4} or {1, 5} or {2, 6}. In some embodiments, there may be one or two columns or rows of three columns or rows in the precoding matrix (e.g., one or two columns or rows of a third set), and in each column or row, a non-zero value may be mapped to two of the eight elements, and zero may be mapped to the other six elements. For example, the indexes of two elements with non-zero values ​​may be the same within one or two columns or rows of the third set. For example, the indexes of two elements with non-zero values ​​may be idx_3, and idx_3 may be two values ​​from {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}.For example, idx_3 may be {4, 5} or {4, 6} or {5, 6} or {5, 7} or {2, 6} or {3, 7}. In some embodiments, the two values ​​of idx_3 may be based on the indices of two of the four antenna ports in the first group or the second group. In some embodiments, the two values ​​of idx_3 may be based on the indices of two of the antenna ports in the third group or the fourth group or the fifth group or the sixth group. In some embodiments, there may be one or two of the three columns or rows in the precoding matrix (e.g., one or two columns or rows in a fourth set), and in each column or row, a non-zero value may be mapped to two of the eight elements, and zeros may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within one or two columns or rows in the fourth set. For example, the index of the two elements having non-zero values ​​may be idx_4, and idx_4 may be two values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_4 may be based on the indexes of the remaining two antenna ports of the four antenna ports in the first group or the second group. In some embodiments, the two values ​​of idx_4 may be based on the indexes of two antenna ports in the third group or the fourth group or the fifth group or the sixth group. For example, idx_4 may be {6, 7} or {5, 7} or {7, 8} or {6, 8} or {3, 7} or {4, 8}. In some embodiments, any value of idx_1, any value of idx_2, any value of idx_3, and any value of idx_4 may be different from each other. In some embodiments, there may be three sets: first set, second set, third set, and fourth set. In some embodiments, the total number of columns or rows in the first set and / or second set and / or third set and / or fourth set may be three.In some embodiments, there may be two sets of four, one set having two columns or rows and the other set having one column or row, and in some embodiments, there may be three sets of four, each set having one column or row.

[0195] In some embodiments, there may be a set of four length-2 vectors, each of which may be applied as two non-zero values ​​in a column or row of the precoding matrix. In some embodiments, for a third set of precoding matrices corresponding to three layers, e.g., Set_p3_2, two length-2 vectors may be selected from the four length-2 vectors, and the two values ​​in each vector may be mapped to two of the eight elements, with 0 being mapped to the other element in a column or row of the precoding matrix. In some embodiments, there may be two sets of length-2 vectors, each set including two length-2 vectors. In some embodiments, the two values ​​in a length-2 vector may be applied as two non-zero values ​​mapped to two elements in a column or row of the precoding matrix. For example, the first set of length-2 vectors may be {[1;1], [1;-1]}. For another example, the second set of length-2 vectors may be {[1;j], [1;-j]}. In some embodiments, two values ​​in each vector of the first or second set may be mapped to two of the eight elements, and zero may be mapped to the other six elements in a column or row of the precoding matrix. In some embodiments, for two columns or rows of the first set, and / or for one or two columns or rows of the second set, and / or for one or two columns or rows of the third set, and / or for one or two columns or rows of the fourth set, the two vectors selected to map to two non-zero values ​​on two of the eight elements in each column or row may be {[1;1] and [1;-1]} or {[1;j] and [1;-j]}.

[0196] In some embodiments, examples of precoding matrices in the third set of precoding matrices corresponding to three layers are: TIFF2025511321000792.tif50150 or TIFF2025511321000793.tif50150 or TIFF2025511321000794.tif50150. For example, rows or columns may be swapped. For example, each of [a1,a2], [b1,b2], and [c1,c2] may be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, [a1,a2] and [b1,b2] may be [1;1] and [1;-1], respectively. For another example, [a1,a2] and [b1,b2] may be [1;j] and [1;-j], respectively. For example, [a1,a2], [b1,b2], and [c1,c2] may be any one of [1;1], [1;-1], [1;j], and [1;-j].

[0197] In some embodiments, if the number of layers is indicated as three for the terminal device 110-1, there may be a fourth set of precoding matrices (e.g., a fourth set of noncoherent precoding matrices) corresponding to three layers. For example, each of the eight antenna ports may be noncoherent with respect to one another. In some embodiments, there may be a fourth set of precoding matrices (e.g., a fourth set of noncoherent precoding matrices) represented as, for example, "Set_n3_1," and the size of the precoding matrix may be 3×8 or 8×3. In some embodiments, there may be three columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the precoding matrix, one element of the eight elements in the precoding matrix may have a nonzero value. For example, the nonzero value may be 1. The values ​​of the other seven elements in the precoding matrix may be 0. In some embodiments, for each of three columns or rows in the precoding matrix, the non-zero value may be mapped to one of eight elements, and 0 may be mapped to the other seven elements. For example, the index of an element having a non-zero value may be different in each row or column of the precoding matrix. For example, the index of an element having a non-zero value may be idx_1, idx_2, and idx_3 for the first, second, and third columns or rows of the precoding matrix, respectively, and for each of idx_1, idx_2, and idx_3, the value may be one of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the values ​​of idx_1, idx_2, and idx_3 may be based on the indexes of three of four antenna ports in the first group or the second group.In some embodiments, the values ​​of idx_1, idx_2, and idx_3 may be based on the indexes of two antenna ports in the third group, the fourth group, the fifth group, or the sixth group, or based on the index of one of the two antenna ports in the third group, the fourth group, or the fifth group. For example, the values ​​of idx_1, idx_2, and idx_3 may each be one of {0, 1, 2, 3}, {0, 2, 4, 6}, {4, 5, 6, 7}, or {1, 3, 5, 7}. For example, the values ​​of idx_1, idx_2, and idx_3 may each be one of {1, 2, 3, 4}, {5, 6, 7, 8}, {1, 3, 5, 7}, or {2, 4, 6, 8}. For example, the values ​​of idx_1, idx_2, and idx_3 may be different from each other.

[0198] In some embodiments, if the number of layers is indicated as three for terminal device 110-1, there may be a fourth set of precoding matrices corresponding to three layers. For example, there may be one, two, or four precoding matrices (e.g., non-coherent precoding matrices) in the fourth set corresponding to three layers. For example, the precoding matrices in the fourth set of precoding matrices corresponding to three layers may be: TIFF2025511321000795.tif50150 or It could also be TIFF2025511321000796.tif50150.

[0199] In some embodiments, when the number of layers is indicated as 3 in the terminal device 110-1, the precoding matrix may be indicated as shown in Table 39 below. TIFF2025511321000797.tif217168 TIFF2025511321000798.tif146168

[0200] In some embodiments, the number of layers may be denoted as two and there may be a first set of precoding matrices (e.g., a first set of fully coherent precoding matrices) corresponding to the two layers in terminal device 110-1. In some embodiments, the fully coherent precoding matrices may be It may be represented as TIFF2025511321000799.tif10150.

[0201] In some embodiments, TIFF2025511321000800.tif10150 It could also be TIFF2025511321000801.tif16150.

[0202] In some embodiments, P may be 8 or 12 or 16. TIFF2025511321000802.tif6150 can be a non-negative integer. For example, TIFF2025511321000803.tif7150. Another example: TIFF2025511321000804.tif7150. Another example: TIFF2025511321000805.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000806.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000807.tif6150 may be 0 or 1. In some embodiments, TIFF2025511321000808.tif6150 can be a non-negative integer. For example, TIFF2025511321000809.tif7150. Another example: TIFF2025511321000810.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000811.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000812.tif6150 can be 0 or 1. For another example, TIFF2025511321000813.tif6150 may be 0. In some embodiments, TIFF2025511321000814.tif6150 can be a non-negative integer. For example, TIFF2025511321000815.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000816.tif6150 can be 0 or 1. For another example, TIFF2025511321000817.tif6150 can be 0 or 2. For another example, TIFF2025511321000818.tif6150 may be 0. In some embodiments, TIFF2025511321000819.tif7150. In some embodiments, TIFF2025511321000820.tif7150. In some embodiments, TIFF2025511321000821.tif6150 can be a non-negative integer. For example, TIFF2025511321000822.tif6150 is {0, TIFF2025511321000823.tif6150, TIFF2025511321000824.tif7150, TIFF2025511321000825.tif7150}. TIFF2025511321000826.tif6150 may be 0. In some embodiments, TIFF2025511321000827.tif6150 can be a non-negative integer. For example, TIFF2025511321000828.tif6150 is {0, TIFF2025511321000829.tif6150}. In some embodiments, TIFF2025511321000830.tif6150 may be 0.

[0203] In some embodiments, the parameter TIFF2025511321000831.tif6150 may also be present. TIFF2025511321000832.tif6150 and / or The value of TIFF2025511321000833.tif6150 is It may be based on the value of TIFF2025511321000834.tif6150, TIFF2025511321000835.tif6150 can be a non-negative integer. For example, TIFF2025511321000836.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000837.tif6150 can be 0 or 1. For another example, TIFF2025511321000838.tif6150 may be 0. In some embodiments, TIFF2025511321000839.tif7150 and In the case of TIFF2025511321000840.tif7150, In the case of TIFF2025511321000841.tif7150, TIFF2025511321000842.tif7150 and / or TIFF2025511321000843.tif7150. In some embodiments, TIFF2025511321000844.tif7150 and In the case of TIFF2025511321000845.tif7150, In the case of TIFF2025511321000846.tif7150, TIFF2025511321000847.tif7150 and / or TIFF2025511321000848.tif7150. In some embodiments, TIFF2025511321000849.tif7150 and In the case of TIFF2025511321000850.tif7150, In the case of TIFF2025511321000851.tif7150, TIFF2025511321000852.tif7150 and / or TIFF2025511321000853.tif7150. In some embodiments, TIFF2025511321000854.tif7150 and In the case of TIFF2025511321000855.tif7150, In the case of TIFF2025511321000856.tif7150, TIFF2025511321000857.tif7150 and / or TIFF2025511321000858.tif7150. In some embodiments, TIFF2025511321000859.tif7150 and In the case of TIFF2025511321000860.tif7150, In the case of TIFF2025511321000861.tif7150, TIFF2025511321000862.tif7150 and / or TIFF2025511321000863.tif7150. In some embodiments, TIFF2025511321000864.tif7150 and In the case of TIFF2025511321000865.tif7150, In the case of TIFF2025511321000866.tif7150, TIFF2025511321000867.tif7150 and / or The file is TIFF2025511321000868.tif7150.

[0204] In some embodiments, there may be two or more subsets of precoding matrices corresponding to two layers. In some embodiments, the first set of precoding matrices corresponding to two layers may include two or more subsets. For example, there may be two, three, or four subsets of precoding matrices.

[0205] In some embodiments, there may be a first subset of precoding matrices corresponding to two layers, and corresponding to the first subset of precoding matrices, the value of "N1" may be 4, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the first subset, TIFF2025511321000869.tif17150. In some embodiments, corresponding to the first subset: TIFF2025511321000870.tif6150 and TIFF2025511321000871.tif6150 may be 0. In some embodiments, corresponding to the first subset, TIFF2025511321000872.tif7150. In some embodiments, corresponding to the first subset: TIFF2025511321000873.tif6150 may be a non-negative integer, TIFF2025511321000874.tif7150. For example, TIFF2025511321000875.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000876.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000877.tif6150 can be 0 or 1. For another example, TIFF2025511321000878.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the first subset corresponding to two layers may be 128, 64, 32, 16, 8, 4, or 2.

[0206] In some embodiments, there may be a second subset of precoding matrices corresponding to two layers, and corresponding to the second subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 2, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 4, 2, or 1. In some embodiments, corresponding to the second subset, TIFF2025511321000879.tif17150. In some embodiments, corresponding to the second subset: TIFF2025511321000880.tif7150. In some embodiments, corresponding to the second subset: TIFF2025511321000881.tif7150. In some embodiments, corresponding to the second subset: TIFF2025511321000882.tif6150 may be a non-negative integer, TIFF2025511321000883.tif7150. For example, TIFF2025511321000884.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000885.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000886.tif6150 can be 0 or 1. For another example, TIFF2025511321000887.tif6150 may be 0 or 2. In some embodiments, corresponding to the second subset, TIFF2025511321000888.tif6150 can be a non-negative integer. For example, TIFF2025511321000889.tif7150. Another example: TIFF2025511321000890.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321000891.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000892.tif6150 can be 0 or 1. For another example, TIFF2025511321000893.tif6150 may be 0. In some embodiments, the number of precoding matrices in the second subset corresponding to two layers may be 256, 128, 32, 16, 8, 4, or 2.

[0207] In some embodiments, there may be a third subset of precoding matrices for terminal device 110-1 when the number of layers is indicated as 2. In some embodiments, a third vector TIFF2025511321000894.tif9150. In some embodiments, TIFF2025511321000895.tif16150. In some embodiments, the fourth vector TIFF2025511321000896.tif9150. In some embodiments, TIFF2025511321000897.tif16150. In some embodiments, TIFF2025511321000898.tif7150 and TIFF2025511321000899.tif7150, TIFF2025511321000900.tif17150 In some embodiments, TIFF2025511321000901.tif6150 can be a non-negative integer. For example, TIFF2025511321000902.tif7150. Another example: TIFF2025511321000903.tif6150 may be at least one of {0, 2}. TIFF2025511321000904.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000905.tif6150 can be 0 or 1. For example, The value of TIFF2025511321000906.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000907.tif6150 may be 0. For example, The value of TIFF2025511321000908.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000909.tif6150 may be 0.

[0208] In some embodiments, the parameter TIFF2025511321000910.tif6150 may also be present. TIFF2025511321000911.tif6150 and / or The value of TIFF2025511321000912.tif6150 is It may be based on the value of TIFF2025511321000913.tif6150, TIFF2025511321000914.tif6150 can be a non-negative integer. For example, TIFF2025511321000915.tif6150 may be at least one of {0, 1}. TIFF2025511321000916.tif6150 may be 0. In some embodiments, TIFF2025511321000917.tif7150 and In the case of TIFF2025511321000918.tif7150, In the case of TIFF2025511321000919.tif7150, TIFF2025511321000920.tif7150 and / or The file is TIFF2025511321000921.tif7150.

[0209] In some embodiments, there may be a third subset of precoding matrices corresponding to two layers, and corresponding to the third subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the third subset, TIFF2025511321000922.tif17150. In some embodiments, corresponding to a third subset: TIFF2025511321000923.tif6150 and TIFF2025511321000924.tif6150 may be 0. In some embodiments, corresponding to the third subset, TIFF2025511321000925.tif7150. In some embodiments, corresponding to a third subset: TIFF2025511321000926.tif6150 may be a non-negative integer, TIFF2025511321000927.tif7150. For example, TIFF2025511321000928.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000929.tif6150 can be 0 or 1. For another example, TIFF2025511321000930.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the third subset corresponding to two layers may be 64, 32, 16, 8, 4, or 2.

[0210] In some embodiments, the number of layers may be indicated as two to terminal device 110-1, and the precoding matrices in the third subset of precoding matrices corresponding to the two layers may be TIFF2025511321000931.tif10150. TIFF2025511321000932.tif10150 TIFF2025511321000933.tif16150. In some embodiments, corresponding to the third subset: TIFF2025511321000934.tif7150. In some embodiments, TIFF2025511321000935.tif6150 TIFF2025511321000936.tif6150 or 0. In some embodiments, corresponding to the third subset: TIFF2025511321000937.tif7150. In some embodiments, TIFF2025511321000938.tif6150 may be 0. In some embodiments, TIFF2025511321000939.tif6150 It could also be TIFF2025511321000940.tif6150.

[0211] In some embodiments, terminal device 110-1 may have a fourth subset of precoding matrices if the number of layers is indicated as 2. In some embodiments, a fifth vector TIFF2025511321000941.tif9150. In some embodiments, TIFF2025511321000942.tif16150. In some embodiments, the sixth vector TIFF2025511321000943.tif9150. In some embodiments, TIFF2025511321000944.tif24150. In some embodiments, TIFF2025511321000945.tif7150 and TIFF2025511321000946.tif7150, TIFF2025511321000947.tif17150. In some embodiments, TIFF2025511321000948.tif6150 can be a non-negative integer. For example, TIFF2025511321000949.tif7150. Another example: TIFF2025511321000950.tif6150 may be at least one of {0, 2}. TIFF2025511321000951.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000952.tif6150 can be 0 or 1. For example, The value of TIFF2025511321000953.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000954.tif6150 may be 0. For example, The value of TIFF2025511321000955.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000956.tif6150 may be 0. For example, The value of TIFF2025511321000957.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000958.tif6150 may be 0. For example, The value of TIFF2025511321000959.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321000960.tif6150 may be 0. In some embodiments, TIFF2025511321000961.tif7150. In some embodiments, TIFF2025511321000962.tif6150 TIFF2025511321000963.tif6150 or 0. In some embodiments, TIFF2025511321000964.tif7150. In some embodiments, TIFF2025511321000965.tif6150 may be 0. In some embodiments, TIFF2025511321000966.tif6150 and TIFF2025511321000967.tif6150 may be 0.

[0212] In some embodiments, there may be a fourth subset of precoding matrices corresponding to two layers, and corresponding to the fourth subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the fourth subset, TIFF2025511321000968.tif17150. In some embodiments, corresponding to the fourth subset: TIFF2025511321000969.tif6150 and TIFF2025511321000970.tif6150 may be 0. In some embodiments, corresponding to the fourth subset, TIFF2025511321000971.tif7150. In some embodiments, corresponding to the fourth subset: TIFF2025511321000972.tif6150 may be a non-negative integer, TIFF2025511321000973.tif7150. For example, TIFF2025511321000974.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321000975.tif6150 can be 0 or 1. For another example, TIFF2025511321000976.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the fourth subset corresponding to two layers may be 64, 32, 16, 8, 4, or 2.

[0213] In some embodiments, the number of layers may be indicated as two to terminal device 110-1, and the precoding matrices in the fourth subset of precoding matrices corresponding to the two layers may be TIFF2025511321000977.tif10150. TIFF2025511321000978.tif10150 TIFF2025511321000979.tif16150. In some embodiments, corresponding to the fourth subset: TIFF2025511321000980.tif7150. In some embodiments, TIFF2025511321000981.tif6150 TIFF2025511321000982.tif6150 or 0. In some embodiments, corresponding to the fourth subset: TIFF2025511321000983.tif7150. In some embodiments, TIFF2025511321000984.tif6150 may be 0. In some embodiments, corresponding to the fourth subset, TIFF2025511321000985.tif7150. In some embodiments, TIFF2025511321000986.tif6150 TIFF2025511321000987.tif6150 or 0. In some embodiments, corresponding to the fourth subset: TIFF2025511321000988.tif7150. In some embodiments, TIFF2025511321000989.tif6150 may be 0. In some embodiments, TIFF2025511321000990.tif6150 and TIFF2025511321000991.tif6150 may be 0. In some embodiments, TIFF2025511321000992.tif6150 TIFF2025511321000993.tif7150. In some embodiments, TIFF2025511321000994.tif6150 It could also be TIFF2025511321000995.tif7150.

[0214] In some embodiments, if the number of layers is indicated as two for terminal device 110-1, there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to the two layers. For example, if terminal device 110-1 has eight antenna ports, or if the PUSCH transmission of terminal device 110-1 is associated with eight antenna ports, or if the PUSCH transmission of terminal device 110-1 is associated with an SRS with eight ports, four antenna ports (e.g., four ports in the first set) may be coherent and the other four antenna ports (e.g., four ports in the second set) may be coherent. For example, the four ports in the first set may not be coherent with the four ports in the second set. In some embodiments, there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to two layers, e.g., denoted as "Set_p2_1," and the size of the partially coherent precoding matrices may be 2x8 or 8x2. In some embodiments, there may be two columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the partially coherent precoding matrix, four of the eight elements in the partially coherent precoding matrix may have non-zero values. The other four elements in the partially coherent precoding matrix may have values ​​of zero. In some embodiments, there may be C4 columns or rows of two columns or rows in the precoding matrix (e.g., a first set of C4 columns or rows, e.g., C=1 or 2), and in each column, non-zero values ​​may be mapped to four of the eight elements and zeros may be mapped to the other four elements. For example, the indices of four elements with non-zero values ​​may be the same within C4 columns or rows of the first set.For example, the index of the four elements having non-zero values ​​may be idx_1, and idx_1 may be one of four values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the four values ​​of idx_1 may be based on the indexes of the four antenna ports in the first group or the second group. For example, idx_1 may be {0, 1, 2, 3} or {0, 2, 4, 6} or {1, 2, 3, 4} or {1, 3, 5, 7}. In some embodiments, 2-C4 of the length-4 vectors of the first set or the second set may be selected for the other 2-C4 columns or rows. In some embodiments, for the other 2-C4 columns or rows of the two columns or rows in the precoding matrix (e.g., the second set of 2-C4 columns or rows), non-zero values ​​may be mapped to four of the eight elements in each column or row, and zeros may be mapped to the other four elements. For example, the indices of the four elements with non-zero values ​​may be the same within the second set of 2-C4 columns or rows. For example, the indices of the four elements with non-zero values ​​may be idx_2, where idx_2 may be one of four values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the four values ​​of idx_2 may be based on the indices of the four antenna ports in the first group or the second group. For example, idx_2 may be {4, 5, 6, 7} or {1, 3, 5, 7} or {5, 6, 7, 8} or {2, 4, 6, 8}. In some embodiments, any value of idx_1 may be different from any value of idx_2. In some embodiments, C4 may be 2, and there may be no second set of columns or rows.

[0215] In some embodiments, there may be two sets of length-4 vectors, each set including four length-4 vectors. In some embodiments, values ​​in the length-4 vectors may apply to four non-zero values ​​that map to four elements in a column or row of the precoding matrix. For example, the first set of length-4 vectors may be {[1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], [1;-1;-1;1]}. For another example, the second set of length-4 vectors may be {[1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], [1;-1;-j;j]}. In some embodiments, the four values ​​in each vector of the first or second set may map to four of the eight elements, and zeros may map to the other four elements in a column or row of the precoding matrix. In some embodiments,

[0216] In some embodiments, examples of precoding matrices in the second set of precoding matrices corresponding to two layers are: TIFF2025511321000996.tif50150 or TIFF2025511321000997.tif50150. For example, rows or columns may be swapped. For example, rows or columns may be swapped. For example, each of [a1, a2, a3, a4] and [b1, b2, b3, b4] may be one of the length-4 vectors in the first set of length-4 vectors or the second set of length-4 vectors. For example, [a1, a2, a3, a4] and [b1, b2, b3, b4] may be two of [1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], and [1;-1;-1;1]. For example, [a1, a2, a3, a4], [b1, b2, b3, b4] may be two of [1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], and [1;-1;-j;j]. For example, each of [a1, a2, a3, a4], [b1, b2, b3, b4] may be one of length-4 vectors in the first set of length-4 vectors or in the second set of length-4 vectors.

[0217] In some embodiments, TIFF2025511321000998.tif6150 may be a positive integer. For example, TIFF2025511321000999.tif7150. For example, TIFF2025511321001000.tif6150 can be 64 or 32 or 16 or 8 or 4 or 2.

[0218] In some embodiments, if the number of layers is indicated as two for the terminal device 110-1, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) corresponding to two layers. For example, the eight-port structure may be 2+2+2+2, meaning that there are four groups, each group includes two antenna ports, and in each group, the two antenna ports may be coherent. For example, antenna ports may not be coherent between groups. In some embodiments, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) represented as, for example, "Set_p2_2," and the size of the precoding matrix may be 2×8 or 8×2. In some embodiments, there may be two columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the precoding matrix, two of the eight elements in the precoding matrix may have non-zero values. The values ​​of the other six elements in the precoding matrix may be 0. In some embodiments, there may be one or two columns or rows out of two columns or rows in the precoding matrix (e.g., one or two columns or rows in the first set), and in each column or row, a non-zero value may be mapped to two of the eight elements, and 0 may be mapped to the other six elements. For example, the indexes of two elements with non-zero values ​​may be the same within one or two columns or rows of the first set. For example, the indexes of two elements with non-zero values ​​may be idx_1, where idx_1 may be one or two values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_1 may be based on the indexes of two of the four antenna ports in the first group or the second group.In some embodiments, the two values ​​of idx_1 may be based on the indices of two antenna ports in the third group, the fourth group, the fifth group, or the sixth group. For example, idx_1 may be {0, 1} or {0, 2} or {1, 2} or {1, 3} or {0, 4} or {1, 5}. In some embodiments, there may be one or two columns or rows (e.g., one or two columns or rows in the second set) of two columns or rows in the precoding matrix, and in each column or row, a non-zero value may be mapped to two of the eight elements, and zero may be mapped to the other six elements. For example, the indices of two elements with non-zero values ​​may be the same within one or two columns or rows in the second set. For example, the index of two elements having non-zero values ​​may be idx_2, and idx_2 may be one or two values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_2 may be based on the indexes of the remaining two antenna ports of the four antenna ports in the first group or the second group. In some embodiments, the two values ​​of idx_2 may be based on the indexes of two antenna ports in the third group or the fourth group or the fifth group or the sixth group. For example, idx_2 may be {2, 3} or {1, 3} or {3, 4} or {2, 4} or {1, 5} or {2, 6}. In some embodiments, any value of idx_1 and any value of idx_2 may be different from each other. In some embodiments, the total number of columns or rows in the first set and / or the second set may be two. In some embodiments, there may be a first set and a second set, each set having one column or row, hi some embodiments, there may be only one first set, the first set having two columns or rows.

[0219] In some embodiments, there may be a set of four length-2 vectors, each of which may be applied as two non-zero values ​​in a column or row of the precoding matrix. In some embodiments, for a third set of precoding matrices corresponding to two layers, e.g., Set_p2_2, two length-2 vectors may be selected from the four length-2 vectors, and the two values ​​in each vector may be mapped to two of the eight elements, with 0 being mapped to the other element in a column or row of the precoding matrix. In some embodiments, there may be two sets of length-2 vectors, each set including two length-2 vectors. In some embodiments, the two values ​​in a length-2 vector may be applied as two non-zero values ​​mapped to two elements in a column or row of the precoding matrix. For example, the first set of length-2 vectors may be {[1;1], [1;-1]}. For another example, the second set of length-2 vectors may be {[1;j], [1;-j]}. In some embodiments, two values ​​in each vector of the first or second set may be mapped to two of the eight elements, and zero may be mapped to the other six elements in a column or row of the precoding matrix. In some embodiments, for two columns or rows of the first set, and / or for one or two columns or rows of the second set, and / or for one or two columns or rows of the third set, and / or for one or two columns or rows of the fourth set, the two vectors selected to map to two non-zero values ​​on two of the eight elements in each column or row may be {[1;1] and [1;-1]} or {[1;j] and [1;-j]}.

[0220] In some embodiments, an example of a precoding matrix in the third set of precoding matrices corresponding to two layers is: TIFF2025511321001001.tif50150 or TIFF2025511321001002.tif50150. For example, rows or columns may be swapped. For example, each of [a1, a2] and [b1, b2] may be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, [a1, a2] and [b1, b2] may be [1;1] and [1;-1], respectively. For another example, [a1, a2] and [b1, b2] may be [1;j] and [1;-j], respectively. For example, [a1, a2] and [b1, b2] may be any one of [1;1], [1;-1], [1;j], and [1;-j].

[0221] In some embodiments, if the number of layers is indicated as two for the terminal device 110-1, there may be a fourth set of precoding matrices (e.g., a fourth set of noncoherent precoding matrices) corresponding to two layers. For example, each of the eight antenna ports may be noncoherent with respect to one another. In some embodiments, there may be a fourth set of precoding matrices (e.g., a fourth set of noncoherent precoding matrices) represented as, for example, "Set_n2_1," and the size of the precoding matrix may be 2×8 or 8×2. In some embodiments, there may be two columns or rows of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for a column or row of the precoding matrix, one element of the eight elements in the precoding matrix may have a nonzero value. For example, the nonzero value may be 1. The values ​​of the other seven elements in the precoding matrix may be 0. In some embodiments, for each of two columns or rows in the precoding matrix, the non-zero value may be mapped to one of eight elements, and 0 may be mapped to the other seven elements. For example, the index of an element having a non-zero value may be different in each row or column of the precoding matrix. For example, the index of an element having a non-zero value may be idx_1 or idx_2 for the first or second column or row of the precoding matrix, respectively, and for each of idx_1 and idx_2, the value may be one of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the values ​​of idx_1 and idx_2 may be based on the indexes of two of four antenna ports in the first group or the second group. In some embodiments, the values ​​of idx_1 and idx_2 may be based on the indexes of two antenna ports in the third group, or the fourth group, or the fifth group, or the sixth group.For example, the values ​​of idx_1 and idx_2 may each be one of {0, 1, 2, 3} or {0, 2, 4, 6} or {4, 5, 6, 7} or {1, 3, 5, 7}. For another example, the values ​​of idx_1 and idx_2 may be {1, 2}, {3, 4} or {5, 6}, {7, 8} or {1, 3}, {5, 7} or {2, 4}, {6, 8}. For example, the values ​​of idx_1 and idx_2 may be different from each other.

[0222] In some embodiments, if the number of layers is indicated as two for terminal device 110-1, there may be a fourth set of precoding matrices corresponding to two layers. For example, there may be one, two, four, six, or twelve precoding matrices (e.g., non-coherent precoding matrices) in the fourth set corresponding to two layers. For example, the precoding matrices in the fourth set of precoding matrices corresponding to two layers may be: TIFF2025511321001003.tif50150 or TIFF2025511321001004.tif50150 or TIFF2025511321001005.tif50150 or TIFF2025511321001006.tif50150 or TIFF2025511321001007.tif50150 or It could also be TIFF2025511321001008.tif50150.

[0223] for example, The file is TIFF2025511321001009.tif7150.

[0224] In some embodiments, when there are two layers in terminal device 110-1, the precoding matrix may be shown as in Table 40 below. TIFF2025511321001010.tif226168 TIFF2025511321001011.tif231168

[0225] In some embodiments, terminal device 110-1 may have a first set of precoding matrices (e.g., a first set of fully coherent precoding matrices) corresponding to one layer, where the number of layers is denoted as 1. In some embodiments, the fully coherent precoding matrices may be It may be represented as TIFF2025511321001012.tif9150.

[0226] In some embodiments, TIFF2025511321001013.tif9150 It could also be TIFF2025511321001014.tif12150.

[0227] In some embodiments, P may be 8 or 12 or 16. TIFF2025511321001015.tif6150 can be a non-negative integer. For example, TIFF2025511321001016.tif7150. Another example: TIFF2025511321001017.tif7150. Another example: TIFF2025511321001018.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321001019.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321001020.tif6150 may be 0 or 1. In some embodiments, TIFF2025511321001021.tif6150 can be a non-negative integer. For example, TIFF2025511321001022.tif7150. Another example: TIFF2025511321001023.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321001024.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321001025.tif6150 can be 0 or 1. For another example, TIFF2025511321001026.tif6150 may be 0. In some embodiments, TIFF2025511321001027.tif6150 can be a non-negative integer. For example, TIFF2025511321001028.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321001029.tif6150 can be 0 or 1. For another example, TIFF2025511321001030.tif6150 can be 0 or 2. For another example, TIFF2025511321001031.tif6150 may be 0.

[0228] In some embodiments, there may be two or more subsets of precoding matrices corresponding to one layer. In some embodiments, the first set of precoding matrices corresponding to one layer may include two or more subsets. For example, there may be two, three, or four subsets of precoding matrices.

[0229] In some embodiments, there may be a first subset of precoding matrices corresponding to one layer, and corresponding to the first subset of precoding matrices, the value of "N1" may be 4, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the first subset, TIFF2025511321001032.tif17150. In some embodiments, corresponding to the first subset: TIFF2025511321001033.tif6150 and TIFF2025511321001034.tif6150 may be 0. In some embodiments, corresponding to the first subset, TIFF2025511321001035.tif7150. In some embodiments, corresponding to the first subset: TIFF2025511321001036.tif6150 may be a non-negative integer, TIFF2025511321001037.tif7150. For example, TIFF2025511321001038.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321001039.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321001040.tif6150 can be 0 or 1. For another example, TIFF2025511321001041.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the first subset corresponding to one layer may be 32, 16, 8, 4, or 2.

[0230] In some embodiments, there may be a second subset of precoding matrices corresponding to one layer, and corresponding to the second subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 2, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 4, 2, or 1. In some embodiments, corresponding to the second subset, TIFF2025511321001042.tif17150. In some embodiments, corresponding to the second subset: TIFF2025511321001043.tif6150 may be a non-negative integer, TIFF2025511321001044.tif7150. For example, TIFF2025511321001045.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321001046.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321001047.tif6150 can be 0 or 1. For another example, TIFF2025511321001048.tif6150 may be 0 or 2. In some embodiments, corresponding to the second subset, TIFF2025511321001049.tif6150 can be a non-negative integer. For example, TIFF2025511321001050.tif7150. Another example: TIFF2025511321001051.tif6150 may be at least one of {0, 2, 4, 6}. TIFF2025511321001052.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321001053.tif6150 can be 0 or 1. For another example, TIFF2025511321001054.tif6150 may be 0. In some embodiments, the number of precoding matrices in the second subset corresponding to one layer may be 256, 128, 32, 16, 8, 4, or 2.

[0231] In some embodiments, terminal device 110-1 may have a third subset of precoding matrices if the number of layers is indicated as 1. In some embodiments, in some embodiments, a third vector TIFF2025511321001055.tif9150. In some embodiments, TIFF2025511321001056.tif16150. In some embodiments, TIFF2025511321001057.tif7150 and TIFF2025511321001058.tif7150, TIFF2025511321001059.tif17150 In some embodiments, TIFF2025511321001060.tif6150 can be a non-negative integer. For example, TIFF2025511321001061.tif7150. Another example: TIFF2025511321001062.tif6150 may be at least one of {0, 2}. TIFF2025511321001063.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321001064.tif6150 can be 0 or 1. For example, The value of TIFF2025511321001065.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321001066.tif6150 may be 0. For example, The value of TIFF2025511321001067.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321001068.tif6150 may be 0.

[0232] In some embodiments, there may be a third subset of precoding matrices corresponding to one layer, and corresponding to the third subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the third subset, TIFF2025511321001069.tif17150. In some embodiments, corresponding to a third subset: TIFF2025511321001070.tif6150 may be a non-negative integer, TIFF2025511321001071.tif7150. For example, TIFF2025511321001072.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321001073.tif6150 can be 0 or 1. For another example, TIFF2025511321001074.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the third subset corresponding to one layer may be 256, 128, 64, 32, 16, 8, 4, or 2.

[0233] In some embodiments, the number of layers may be indicated as 1 in terminal device 110-1, and the precoding matrices in the third subset of precoding matrices corresponding to one layer are TIFF2025511321001075.tif9150. In some embodiments, TIFF2025511321001076.tif9150 TIFF2025511321001077.tif9150. In some embodiments, TIFF2025511321001078.tif6150 It could also be TIFF2025511321001079.tif6150.

[0234] In some embodiments, terminal device 110-1 may have a fourth subset of precoding matrices if the number of layers is indicated as 1. In some embodiments, a fifth vector TIFF2025511321001080.tif9150. In some embodiments, TIFF2025511321001081.tif16150. In some embodiments, TIFF2025511321001082.tif7150 and TIFF2025511321001083.tif7150, TIFF2025511321001084.tif17150 In some embodiments, TIFF2025511321001085.tif6150 can be a non-negative integer. For example, TIFF2025511321001086.tif7150. Another example: TIFF2025511321001087.tif6150 may be at least one of {0, 2}. TIFF2025511321001088.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321001089.tif6150 can be 0 or 1. For example, The value of TIFF2025511321001090.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321001091.tif6150 may be 0. For example, The value of TIFF2025511321001092.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321001093.tif6150 may be 0. For example, The value of TIFF2025511321001094.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321001095.tif6150 may be 0. For example, The value of TIFF2025511321001096.tif6150 may be at least one of {0, 1, 2, 3} or {0, 1} or {0, 2}. The value of TIFF2025511321001097.tif6150 may be 0.

[0235] In some embodiments, there may be a fourth subset of precoding matrices corresponding to one layer, and corresponding to the fourth subset of precoding matrices, the value of "N1" may be 2, the value of "N2" may be 1, and the value of "O1" may be 4, 2, or 1. For example, the value of "O2" may be 1. In some embodiments, corresponding to the fourth subset, TIFF2025511321001098.tif17150 In some embodiments, corresponding to the fourth subset: TIFF2025511321001099.tif6150 may be a non-negative integer, TIFF2025511321001100.tif7150. For example, TIFF2025511321001101.tif6150 may be at least one of {0, 1, 2, 3}. TIFF2025511321001102.tif6150 can be 0 or 1. For another example, TIFF2025511321001103.tif6150 may be 0 or 2. In some embodiments, the number of precoding matrices in the fourth subset corresponding to one layer may be 256, 128, 64, 32, 16, 8, 4, or 2.

[0236] In some embodiments, the number of layers may be indicated as 1 in the terminal device 110-1, and the precoding matrices in the fourth subset of precoding matrices corresponding to one layer are TIFF2025511321001104.tif9150. TIFF2025511321001105.tif9150 TIFF2025511321001106.tif9150. In some embodiments, TIFF2025511321001107.tif6150 TIFF2025511321001108.tif7150. In some embodiments, TIFF2025511321001109.tif6150 It could also be TIFF2025511321001110.tif7150.

[0237] In some embodiments, if the number of layers is indicated as 1 for terminal device 110-1, there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to one layer. For example, if terminal device 110-1 has eight antenna ports, or if the PUSCH transmission of terminal device 110-1 is associated with eight antenna ports, or if the PUSCH transmission of terminal device 110-1 is associated with an SRS with eight ports, four antenna ports (e.g., the four ports of the first set) may be coherent and the other four antenna ports (e.g., the four ports of the second set) may be coherent. For example, the four ports of the first set may not be coherent with the four ports of the second set. In some embodiments, there may be a second set of precoding matrices (e.g., a second set of partially coherent precoding matrices) corresponding to two layers, e.g., represented as "Set_p1_1," and the size of the partially coherent precoding matrices may be 1x8 or 8x1. In some embodiments, there may be one column or row of the precoding matrix. In some embodiments, there may be eight elements in the column or row of the precoding matrix. In some embodiments, for the column or row of the partially coherent precoding matrix, four of the eight elements in the partially coherent precoding matrix may have non-zero values. The values ​​of the other four elements in the partially coherent precoding matrix may be zero. In some embodiments, in the precoding matrix and in the column or row, non-zero values ​​may be mapped to four of the eight elements, and zeros may be mapped to the other four elements. For example, the index of the four elements having non-zero values ​​may be idx_1, where idx_1 may be one of four values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the four values ​​of idx_1 may be based on the indexes of the four antenna ports in the first group or the second group.For example, idx_1 may be {0,1,2,3} or {0,2,4,6} or {1,2,3,4} or {1,3,5,7} or {4,5,6,7} or {1,3,5,7} or {5,6,7,8} or {2,4,6,8}.

[0238] In some embodiments, there may be two sets of length-4 vectors, each set including four length-4 vectors. In some embodiments, values ​​in the length-4 vectors may apply to four non-zero values ​​that map to four elements in a column or row of the precoding matrix. For example, the first set of length-4 vectors may be {[1;1;1;1], [1;-1;1;-1], [1;1;-1;-1], [1;-1;-1;1]}. For another example, the second set of length-4 vectors may be {[1;1;j;j], [1;-1;j;-j], [1;1;-j;-j], [1;-1;-j;j]}. In some embodiments, the four values ​​in each vector of the first or second set may map to four of the eight elements, and zeros may map to the other four elements in the column or row of the precoding matrix. In some embodiments,

[0239] In some embodiments, an example of a precoding matrix in the second set of precoding matrices corresponding to one layer 1 is: TIFF2025511321001111.tif50150 or TIFF2025511321001112.tif50150. For example, rows or columns may be swapped. For example, rows or columns may be swapped. For example, each of [a1, a2, a3, a4] may be one of length-4 vectors in the first set of length-4 vectors or in the second set of length-4 vectors. For example, [a1, a2, a3, a4] may be one of [1; 1; 1; 1], [1; -1; 1; -1], [1; 1; -1; -1], [1; -1; -1; 1], [1; 1; j; j], [1; -1; j; -j], [1; 1; -j; -j], and [1; -1; -j; j].

[0240] In some embodiments, TIFF2025511321001113.tif6150 may be a positive integer. For example, TIFF2025511321001114.tif7150. For example, TIFF2025511321001115.tif6150 can be 64 or 32 or 16 or 8 or 4 or 2 or 1.

[0241] In some embodiments, if the number of layers is indicated as 1 for the terminal device 110-1, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) corresponding to one layer. For example, the eight-port structure may be 2+2+2+2, meaning that there are four groups, each group includes two antenna ports, and in each group, the two antenna ports may be coherent. For example, antenna ports may not be coherent between groups. In some embodiments, there may be a third set of precoding matrices (e.g., a third set of partially coherent precoding matrices) represented as, for example, "Set_p1_2," and the size of the precoding matrix may be 1×8 or 8×1. In some embodiments, there may be one column or row of the precoding matrix. In some embodiments, there may be eight elements in the column or row of the precoding matrix. In some embodiments, for the column or row of the precoding matrix, two of the eight elements in the precoding matrix may have non-zero values. The values ​​of the other six elements in the precoding matrix may be 0. In some embodiments, in a column or row of the precoding matrix, the non-zero value may be mapped to two of the eight elements, and 0 may be mapped to the other six elements. For example, the index of the two elements having non-zero values ​​may be idx_1, and idx_1 may be two values ​​of {0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the two values ​​of idx_1 may be based on the indexes of two of the four antenna ports in the first group or the second group. In some embodiments, the two values ​​of idx_1 may be based on the indexes of two antenna ports in the third group, the fourth group, the fifth group, or the sixth group.

[0242] In some embodiments, there may be a set of four length-2 vectors, each of which may be applied as two non-zero values ​​in a column or row of the precoding matrix. In some embodiments, for a third set of precoding matrices corresponding to one layer, e.g., Set_p1_2, two length-2 vectors may be selected from the four length-2 vectors, and the two values ​​in each vector may be mapped to two of the eight elements, with 0 being mapped to the other element in the column or row of the precoding matrix. In some embodiments, there may be two sets of length-2 vectors, each set including two length-2 vectors. In some embodiments, the two values ​​in a length-2 vector may be applied as two non-zero values ​​mapped to two elements in a column or row of the precoding matrix. For example, the first set of length-2 vectors may be {[1;1], [1;-1]}. For another example, the second set of length-2 vectors may be {[1;j], [1;-j]}. In some embodiments, two values ​​in each vector of the first or second set may be mapped to two of the eight elements, and zero may be mapped to the other six elements in that column or row of the precoding matrix. In some embodiments, for a column or row, the two vectors selected to map to two non-zero values ​​on two of the eight elements in each column or row may be {[1;1] and [1;-1]} or {[1;j] and [1;-j]}.

[0243] In some embodiments, an example of a precoding matrix in the third set of precoding matrices corresponding to one layer is: TIFF2025511321001116.tif50150 or TIFF2025511321001117.tif50150 or TIFF2025511321001118.tif50150 or TIFF2025511321001119.tif50150 or TIFF2025511321001120.tif50150 or TIFF2025511321001121.tif50150. For example, rows or columns may be swapped. For example, [a1, a2] may be one of the length-2 vectors in the first set of length-2 vectors or the second set of length-2 vectors. For example, [a1, a2] may be any one of [1;1], [1;-1], [1;j], and [1;-j].

[0244] In some embodiments, if the number of layers is indicated as 1 for the terminal device 110-1, there may be a fourth set of precoding matrices (e.g., a fourth set of noncoherent precoding matrices) corresponding to one layer. For example, each of the eight antenna ports may be noncoherent with respect to one another. In some embodiments, there may be a fourth set of precoding matrices (e.g., a fourth set of noncoherent precoding matrices) represented as, for example, "Set_n1_1," and the size of the precoding matrix may be 1×8 or 8×1. In some embodiments, there may be one column or row of the precoding matrix. In some embodiments, there may be eight elements in a column or row of the precoding matrix. In some embodiments, for that column or row of the precoding matrix, one element of the eight elements in the precoding matrix may have a nonzero value. For example, the nonzero value may be 1. The values ​​of the other seven elements in the precoding matrix may be 0. In some embodiments, the index of an element in a row or column of the precoding matrix having a non-zero value may be idx_1, where idx_1 may be one of the values ​​{0, 1, 2, 3, 4, 5, 6, 7} or {1, 2, 3, 4, 5, 6, 7, 8}. In some embodiments, the value of idx_1 may be based on the index of one of four antenna ports in the first group or the second group. In some embodiments, the value of idx_1 may be based on the index of one of two antenna ports in the third group or the fourth group or the fifth group or the sixth group.

[0245] In some embodiments, when the number of layers is indicated as 1 in terminal device 110-1, there may be a fourth set of precoding matrices corresponding to one layer. For example, there may be one, two, four, or eight precoding matrices (e.g., non-coherent precoding matrices) in the fourth set corresponding to one layer. For example, the precoding matrices in the fourth set of precoding matrices corresponding to one layer may be: TIFF2025511321001122.tif50150 or TIFF2025511321001123.tif50150 or TIFF2025511321001124.tif50150 or TIFF2025511321001125.tif50150 or TIFF2025511321001126.tif50150 or TIFF2025511321001127.tif50150 or TIFF2025511321001128.tif50150 or It could also be TIFF2025511321001129.tif50150.

[0246] for example, The file is TIFF2025511321001130.tif7150.

[0247] In some embodiments, when there is one layer in terminal device 110-1, the precoding matrix may be shown as in Table 41 below. TIFF2025511321001131.tif186168 TIFF2025511321001132.tif202168

[0248] Alternatively or additionally, terminal device 110-1 may transmit capability information to network device 120 (2020). In some embodiments, the capability information may indicate capabilities of precoding matrices supported by terminal device 110-1. For example, the capability information may indicate a type of precoding matrix supported by terminal device 110-1. In some embodiments, the capability information may include at least one of fully coherent, partially coherent, first partially coherent, second partially coherent, and non-coherent.

[0249] In some embodiments, the capability information may indicate fully coherent, and the set of precoding matrices (e.g., one of the set of precoding matrices corresponding to the v_ri layers may be indicated by a network device, or one or more of the set of precoding matrices may be configured by a network device) may include at least one of a first set of precoding matrices (or at least one of a first subset, or at least one of a second subset, or at least one of a third subset, or at least one of a fourth subset) corresponding to the v_ri layers (e.g., a fully coherent precoding matrix type). For example, the set of precoding matrices may further include at least one of the second set of precoding matrices (e.g., a first partially coherent precoding matrix type) corresponding to the v_ri layers. For example, the set of precoding matrices may further include at least one of the third set of precoding matrices (e.g., a second partially coherent precoding matrix type) corresponding to the v_ri layers. For another example, the set of precoding matrices may further include at least one of the fourth set of precoding matrices (e.g., a non-coherent precoding matrix type) corresponding to the v_ri layers.

[0250] In some embodiments, the capability information may indicate partial coherence or may indicate first partial coherence, and a set of precoding matrices corresponding to the v_ri layers (e.g., one of the set of precoding matrices may be indicated by a network device, or one or more of the set of precoding matrices may be configured by a network device) may include at least one of the second set of precoding matrices corresponding to the v_ri layers (e.g., a first partially coherent precoding matrix type). For example, the set of precoding matrices may further include at least one of the third set of precoding matrices corresponding to the v_ri layers (e.g., a second partially coherent precoding matrix type). For another example, the set of precoding matrices may further include at least one of the fourth set of precoding matrices corresponding to the v_ri layers (e.g., a non-coherent precoding matrix type).

[0251] In some embodiments, the capability information may indicate a second partially coherent precoding matrix, and the set of precoding matrices corresponding to the v_ri layers (e.g., one of the set of precoding matrices may be indicated by a network device, or one or more of the set of precoding matrices may be configured by a network device) may include at least one of the third set of precoding matrices corresponding to the v_ri layers (e.g., a second partially coherent precoding matrix type). For another example, the set of precoding matrices may further include at least one of the fourth set of precoding matrices corresponding to the v_ri layers (e.g., a non-coherent precoding matrix type).

[0252] In some embodiments, the capability information may indicate non-coherence, and the set of precoding matrices corresponding to the v_ri layers (e.g., one of the set of precoding matrices may be indicated by a network device, or one or more of the set of precoding matrices may be configured by a network device) may include at least one of a fourth set of precoding matrices corresponding to the v_ri layers (e.g., a non-coherent precoding matrix type).

[0253] In some embodiments, the capability information may include any one or a combination of the above precoding matrix types. In some embodiments, the capability information may be transmitted via radio resource control (RRC) signaling.

[0254] In some embodiments, network device 120 may configure a type of precoding matrix or at least one set of precoding matrices corresponding to v_ri layers, which may be indicated to or configured by terminal device 110-1. In some embodiments, corresponding to v_ri layers, the at least one configuration may configure at least one of a first subset of precoding matrices corresponding to v_ri layers, a second subset of precoding matrices corresponding to v_ri layers, a third subset of precoding matrices corresponding to v_ri layers, a fourth subset of precoding matrices corresponding to v_ri layers, a first set of precoding matrices corresponding to v_ri layers, a second set of precoding matrices corresponding to v_ri layers, a third set of precoding matrices corresponding to v_ri layers, and a fourth set of precoding matrices corresponding to v_ri layers.

[0255] In some embodiments, when the capability information is indicated as fully coherent, the at least one configuration may correspond to v_ri layers, and may configure at least one of a first subset of precoding matrices corresponding to the v_ri layers, a second subset of precoding matrices corresponding to the v_ri layers, a third subset of precoding matrices corresponding to the v_ri layers, a fourth subset of precoding matrices corresponding to the v_ri layers, a first set of precoding matrices corresponding to the v_ri layers, a second set of precoding matrices corresponding to the v_ri layers, a third set of precoding matrices corresponding to the v_ri layers, and a fourth set of precoding matrices corresponding to the v_ri layers.

[0256] In some embodiments, when the capability information is indicated as partially coherent or first partially coherent, corresponding to v_ri layers, the at least one configuration may configure at least one of a second set of precoding matrices corresponding to the v_ri layers, a third set of precoding matrices corresponding to the v_ri layers, and a fourth set of precoding matrices corresponding to the v_ri layers.

[0257] In some embodiments, when the capability information is indicated as second partially coherent, corresponding to v_ri layers, the at least one configuration may configure at least one of a third set of precoding matrices corresponding to the v_ri layers and a fourth set of precoding matrices corresponding to the v_ri layers.

[0258] In some embodiments, if the capability information is indicated as non-coherent, corresponding to v_ri layers, the at least one configuration may configure at least one of a fourth set of precoding matrices corresponding to the v_ri layers.

[0259] In some embodiments, the network device 120 may determine the type of precoding matrix that can be supported by the terminal device. In this case, the network device 120 may transmit an indication of the type of precoding matrix. The type of precoding matrix may be any one or combination of a fully coherent precoding matrix type, a fully coherent and partially coherent and non-coherent precoding matrix type, a partially coherent precoding matrix type, a partially coherent and non-coherent precoding matrix type, or a non-coherent precoding matrix type.

[0260] In some embodiments, network device 120 may transmit at least one configuration associated with a precoding matrix to terminal device 110-1 (2030). In some embodiments, terminal device 110-1 may transmit the at least one configuration associated with a precoding matrix to network device 120. In some embodiments, the at least one configuration may include one or more configurations of antenna port groups. Alternatively or additionally, the at least one configuration may include at least one antenna port group. In some embodiments, the at least one configuration may include one or more configurations of antenna patterns. In some other embodiments, the at least one configuration may include one or more configurations of precoding matrix types. Alternatively or additionally, the at least one configuration may include one or more configurations of precoding matrix subsets. In some embodiments, the at least one configuration may include the number of antenna port groups. In other embodiments, the at least one configuration may include the number of antenna ports in an antenna port group.

[0261] In some embodiments, the at least one configuration may have a first number of antenna groups, each of which may include four antenna ports. For example, the first number may be 0, 1, or 2. In this case, the first number may be a first integer less than or equal to 2. Alternatively or additionally, the at least one configuration may have a second number of antenna groups, each of which may include two antenna ports. For example, the second number may be 0, 1, 2, 3, or 4. In this case, the second number may be a second integer less than or equal to 4. In some other embodiments, the at least one configuration may have a third number of antenna groups, each of which may include one antenna port. The third number may be a third integer less than or equal to 8. In another embodiment, the at least one configuration may include at least one of a subset of full coherent precoding matrices, a subset of partial coherent precoding matrices, or a subset of non-coherent precoding matrices.

[0262] For example, terminal device 110-1 may be configured to have 8 Tx or 8-port SRS (e.g., AP_0, AP_1, AP_2, AP_3, AP_4, AP_5, AP_6, AP_7) for the uplink. In some embodiments, the at least one configuration may include N groups (N may be 0, 1, or 2), each group including four antenna ports, and / or M groups (M is an integer, and 0≦M≦(8−N*4) / 2 or 0≦M≦4), each group including two antenna ports, and / or L groups (or L antenna ports), each group including one antenna port (L is an integer, and 0≦L≦8−N*4−M*2 or 0≦L≦8). Alternatively, the at least one configuration may indicate a subset of fully coherent and / or partially coherent and / or a first partially coherent (e.g., partially coherent 4) and / or a second partially coherent (e.g., partially coherent 2) and / or non-coherent precoding matrices.

[0263] In some embodiments, the at least one setting may be configured for each value of the number of layers or for each precoder type. For example, N1 and M1 may be configured for a first set of precoding matrices corresponding to the v_ri layers or for a fully coherent precoding matrix, N2 and M2 may be configured for a second or third set of precoding matrices corresponding to the v_ri layers or for a partially coherent precoding matrix, and N3 and M3 may be configured for a fourth set of precoding matrices corresponding to the v_ri layers or for a non-coherent precoding matrix.

[0264] In some embodiments, the eight antenna ports for PUSCH transmission or the eight antenna ports of an eight-port SRS may be {AP0, AP1, AP2, AP3, AP4, AP5, AP6, AP7}. Also, AP0 or AP1 or AP2 or AP3 or AP4 or AP5 or AP6 or AP7 may be any one of {0, 1, 2, 3, 4, 5, 6, 7}, any one of {1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007}, or any one of {3000, 3001, 3002, 3003, 3004, 3005, 3006, 3007}. In some embodiments, the values ​​of AP0 or AP1 or AP2 or AP3 or AP4 or AP5 or AP6 or AP7 may be different from each other.

[0265] In some embodiments, each group may include one, two, or four of {AP_a, AP_b, AP_c, AP_d, AP_e, AP_f, AP_g, AP_h}. {a, b, c, d, e, f, g, h} and {AP_a, AP_b, AP_c, AP_d, AP_e, AP_f, AP_g, AP_h} may be integers, such as {0, 1, 2, 3, 4, 5, 6, 7}. These numbers may be different from each other. For example, there are multiple port grouping configurations (four ports in one group): {0, 1, 2, 3}, {4, 5, 6, 7}, or {0, 2, 4, 6}, {1, 3, 5, 7}. Another embodiment is a multiple port grouping configuration (2 ports in 1 group) {0, 1}, {2, 3}, {4, 5}, {6, 7} or {0, 2}, {1, 3}, {4, 6}, {5, 7}.

[0266] In some embodiments, the at least one configuration may indicate one of the port grouping configurations. For example, DMRS ports in the same group may share the same PTRS port. In some embodiments, the precoding matrix may be an 8*v matrix, where v represents the number of layers, v may be an integer, and 1≦v≦8 or 4≦v≦8. In some embodiments, v may be the same as v_ri.

[0267] In some embodiments, the terminal device 110-1 may be configured to have 8 Tx for uplink transmission or to have PUSCH transmission associated with an SRS having 8 ports. 1,1 The value for i 1,2 The value for i 1,3 Value for i2, value for i 1,4,1 The value for i 1,4,2 The value for i 2,0 , the value for i 2,1 The value for i 2,2 , a value for Ng, a value for N1, a value for N2, a value for O1, a value for O2, and a configuration pattern (e.g., for antenna ports). The configuration pattern and / or values ​​may be applied to at least the fully coherent precoding matrix. Table 42 shows example configuration patterns. Table 43 shows values ​​of N1 and / or N2 and the corresponding values ​​of O1 and / or O2. TIFF2025511321001133.tif68168 TIFF2025511321001134.tif29168

[0268] In some embodiments, the at least one configuration may indicate that a first subset, a second subset, a third subset, or a fourth subset of precoding matrices corresponding to the v_ri layers may be applied to the PUSCH transmission. For example, the DCI may indicate one of the precoding matrices applicable to the PUSCH transmission.

[0269] In some embodiments, the at least one configuration may indicate two antenna port groups, each group may include four antenna ports, and based on the at least one configuration, the DCI may indicate one precoding matrix of a first subset of precoding matrices corresponding to the v_ri layers for the PUSCH transmission. In some embodiments, the at least one configuration may indicate four antenna port groups, each group may include two antenna ports, and based on the at least one configuration, the DCI may indicate one precoding matrix of a second subset of precoding matrices corresponding to the v_ri layers for the PUSCH transmission. In some embodiments, the at least one configuration may indicate four antenna port groups, each group may include two antenna ports, and based on the at least one configuration, the DCI may indicate one precoding matrix of a third subset of precoding matrices corresponding to the v_ri layers for the PUSCH transmission. In some embodiments, the at least one configuration may indicate four antenna port groups, each group may include two antenna ports, and based on the at least one configuration, the DCI may indicate one precoding matrix of a fourth subset of precoding matrices corresponding to the v_ri layers for the PUSCH transmission.

[0270] In some embodiments, the at least one configuration may indicate one or two antenna port groups, each group may include four antenna ports, and based on the at least one configuration, the DCI may indicate one precoding matrix from a second subset of precoding matrices corresponding to the v_ri layers for the PUSCH transmission.

[0271] In some embodiments, in a column or row of a precoding matrix in the second subset of precoding matrices corresponding to the v_ri layers, the index of the four non-zero values ​​may be based on the index of the antenna port indices within the group. For example, the non-zero values ​​within a column or row may only be mapped to indices based on the indices of the antenna ports within one or two groups. In some embodiments, the first group includes four antenna ports, and the four antenna ports may be {AP0, AP1, AP2, AP3}. In some embodiments, the second group includes four antenna ports, and the four antenna ports may be {AP4, AP5, AP6, AP7}. In some embodiments, in a column or row of the precoding matrix, one of the length-4 vectors within the first or second set of length-4 vectors may be mapped to an element index based on the antenna port index within the first and / or second group.

[0272] In some embodiments, for a second set of precoding matrices corresponding to eight layers, for four columns or rows of the first set (e.g., the first four columns or rows), a set of length-4 vectors may be mapped to elements with indices based on the four antenna ports in the first group, and for four columns or rows of the second set (e.g., the remaining or last four columns or rows), a set of length-4 vectors may be mapped to elements with indices based on the four antenna ports in the second group.

[0273] In some embodiments, for a third set of precoding matrices corresponding to eight layers, for two columns or rows of the first set (e.g., the first and second columns or rows), a set of length-2 vectors may be mapped to elements with indices based on two of the four antenna ports in the first group; for two columns or rows of the second set (e.g., the third and fourth columns or rows), a set of length-2 vectors may be mapped to elements with indices based on the remaining two antenna ports in the first group; for two columns or rows of the third set (e.g., the fifth and sixth columns or rows), a set of length-2 vectors may be mapped to elements with indices based on two of the four antenna ports in the second group; and for two columns or rows of the fourth set (e.g., the seventh and eighth columns or rows), a set of length-2 vectors may be mapped to elements with indices based on the remaining two antenna ports in the second group.

[0274] In some embodiments, in a column or row of a precoding matrix in the third subset of precoding matrices corresponding to the v_ri layers, the index of the two non-zero values ​​may be based on the index of two of the four antenna port indexes in a group. For example, the non-zero values ​​in a column or row may be mapped only to indexes based on the index of the antenna ports in one or two groups. For example, a first group having four antenna ports may be {AP0, AP1, AP2, AP3}. For another example, a second group having four antenna ports may be {AP4, AP5, AP6, AP7}. In some embodiments, in a column or row of the precoding matrix, one of the length-2 vectors in the first or second set of length-2 vectors may be mapped to an element index based on two of the four antenna port indexes in the first and / or second groups.

[0275] In some embodiments, in a column or row of a precoding matrix in the fourth subset of precoding matrices corresponding to the v_ri layers, the index of the one non-zero value (having a value of 1) may be based on the index of one antenna port index among the four antenna port indexes in a group. For example, the non-zero values ​​in a column or row may be mapped only to indices based on the indices of the antenna ports in one or two groups. For example, a first group having four antenna ports may be {AP0, AP1, AP2, AP3}. For another example, a second group having four antenna ports may be {AP4, AP5, AP6, AP7}. In some embodiments, in a column or row of the precoding matrix, the value 1 may be mapped to the index of an element based on the index of one antenna port among the four antenna port indexes in the first group and / or the second group.

[0276] In some embodiments, the at least one configuration may indicate one, two, three, or four antenna port groups, each group may include two antenna ports, and based on the at least one configuration, the DCI may indicate one precoding matrix from a second subset of precoding matrices corresponding to the v_ri layers for the PUSCH transmission. In some embodiments, the indices of the two non-zero values ​​in a column or row of the precoding matrix may be based on the indices of the antenna port indices within a group. For example, the non-zero values ​​in a column or row may be mapped only to indices based on the indices of the antenna ports within one, two, three, or four groups.

[0277] In some embodiments, there may be a third group, which may include two antenna ports with indices {AP0, AP1}. In some embodiments, there may be a fourth group, which may include two antenna ports with indices {AP2, AP3}. In some embodiments, there may be a fifth group, which may include two antenna ports with indices {AP4, AP5}. In some embodiments, there may be a sixth group, which may include two antenna ports with indices {AP6, AP7}. In some embodiments, in a column or row of the precoding matrix, one of the length-2 vectors in the first or second set of length-2 vectors may be mapped to an element index based on the antenna port index in the third group, fourth group, fifth group, and / or sixth group.

[0278] The network device 120 transmits DCI for scheduling a PUSCH to the terminal device 110-1 (2040). The terminal device 110-1 determines a precoding matrix based on the at least one setting and the DCI (2050). For example, the DCI may indicate a fourth number of layers. In this case, the terminal device 110-1 may determine the precoding matrix based on the fourth number of layers. For example, the precoding matrix may be a matrix having a size of 8 times the fourth number. Alternatively or additionally, the precoding matrix may be a matrix having a size of the fourth number by 8. In some embodiments, the precoding matrix may be a matrix having a fourth number of columns, each column having 8 elements. In some other embodiments, the precoding matrix may be a matrix having a fourth number of rows, each row having 8 elements. The terminal device 110-1 transmits the PUSCH based on the precoding matrix (2060).

[0279] In some embodiments, the DCI may indicate which fully coherent precoding matrix is ​​intended for terminal device 110-1. In some embodiments, the at least one configuration may include one or none of a first fully coherent precoding matrix or a second fully coherent precoding matrix. For example, the at least one configuration may indicate one or both of Set_fv_1 and Set_fv_2. Alternatively, the at least one configuration may include one or more of the number of antenna ports in a first dimension, the number of antenna ports in a second dimension, a first DFT oversampling in the first dimension, or a second DFT oversampling in the second dimension. For example, the at least one configuration may indicate candidate values ​​for at least one of N1, N2, i1,1, O1, O2, i1,2, and i1,3 to generate the precoding matrix. Table 44 shows an example of the at least one configuration. Table 45 shows an example of a precoding matrix. TIFF2025511321001135.tif109168 TIFF2025511321001136.tif57168

[0280] In some embodiments, the DCI may indicate which partially coherent precoding matrix is ​​intended for terminal device 110-1. In some embodiments, the at least one configuration may indicate that if there is at least one antenna port group with four antenna ports, at least one column or at least one row of the precoding matrix has four non-zero values ​​on four of the eight elements. The indices of the four elements may be based on the indices of the four antenna ports in an antenna port group, with zero values ​​on the other four of the eight elements in the column or row. For example, the at least one configuration may indicate that if there is at least one group with four ports, at least one column of the precoder may have four non-zero values ​​(mapped onto four indices (AP_i+1)). Otherwise, there may not be such a type of precoder. Table 46 shows an example of the at least one configuration. TIFF2025511321001137.tif127168

[0281] In some embodiments, the at least one configuration may indicate that if there is at least one antenna port group having two antenna ports, at least one column or at least one row of the precoding matrix has two non-zero values ​​on two of the eight elements. The indices of the two elements may be based on the indices of the two antenna ports in an antenna port group, with zero values ​​on the other six of the eight elements in the column or row. For example, the at least one configuration may indicate that if there is at least one group having two ports, at least one column of the precoder may have two non-zero values ​​(mapped to two indices (AP_i+1)), and otherwise, no precoder of that type exists. Table 47 shows an example of the at least one configuration. TIFF2025511321001138.tif148168

[0282] In some embodiments, the at least one configuration may indicate that if there is at least one antenna port group having one antenna port, then at least one column or at least one row of the precoding matrix has one non-zero value on one element of the eight elements, and the non-zero value is 1. The index of the one element may be based on the index of the antenna port in one antenna port group, with zero values ​​on the other seven elements of the eight elements in the column or row.

[0283] In some embodiments, if the third number is less than or equal to the fourth number, a set of non-coherent precoding matrices associated with the fourth number may be available for the PUSCH. In this case, each column or row of the non-coherent precoding matrix may have one non-zero value in one of its eight elements. The non-zero value may be one. The index of the one element may be based on the index of an antenna port in one antenna port group, with zero values ​​in the other seven of the eight elements in the column or row. The index of the one element in a different column or row may be based on a different antenna port group.

[0284] Alternatively or additionally, if the third number is greater than the fourth number, the set of non-coherent precoding matrices associated with the fourth number may not be available for the PUSCH. Alternatively, if the third number is not set, the set of non-coherent precoding matrices may not be available for the PUSCH. In some embodiments, if the third number is at least one of 1, 2, 3, 4, 5, 6, 7, and 8, the set of non-coherent precoding matrices may include at least a precoding matrix in which each column or row of a precoding matrix has one non-zero value on one element out of eight elements, and the non-zero value is one. The index of the one element may be based on the column or row index, with zero values ​​on the other seven elements out of eight elements in the column or row. In another embodiment, when the third number is at least one of 1, 2, 3, and 4, the set of non-coherent precoding matrices may include at least a precoding matrix in which each column or each row of the precoding matrix has one non-zero value on one of the first four elements, and the non-zero value is 1. The index of the one element may be based on the column or row index, with zero values ​​on the other seven elements in the column or row.

[0285] In some embodiments, when the third number is the same as the fourth number, the set of non-coherent precoding matrices may include at least a precoding matrix in which each column or row of the precoding matrix has one non-zero value on one element of the eight elements, where the non-zero value is 1. The index of the one element in each column or row may be based on the index of each antenna port among the third number of antenna ports, with zero values ​​on the other seven elements of the eight elements in the column or row.

[0286] Alternatively, if the third number is greater than the fourth number, the set of non-coherent precoding matrices may include at least a precoding matrix in which each column or row of a precoding matrix has one non-zero value on one element of eight elements, where the non-zero value is 1. The index of the one element in each column or row may be based on the index of one antenna port, where the antenna port is one of a fourth number of the third number of antenna ports, with zero values ​​on the other seven elements of the eight elements in the column or row. In some other embodiments, if the third number is less than the fourth number, the non-coherent precoding matrix associated with the fourth number may not be available for the PUSCH.

[0287] In some embodiments, the at least one configuration may include an order of eight antenna ports. The set of non-coherent precoding matrices associated with the fourth number may include at least a precoding matrix in which each column or row of the precoding matrix has one non-zero value on one element of the eight elements, the non-zero value being one. The index of the one element in each column or row may be based on the index of one antenna port, the antenna port being one of the antenna ports of the first fourth number of the order of eight antenna ports, with zero values ​​on the other seven of the eight elements in the column or row. Alternatively, the at least one configuration may indicate a precoding matrix in which non-zero values ​​are mapped to the first set of antenna port elements in a four-antenna port group.

[0288] In some embodiments, if the number of antenna port elements in the first set of antenna port elements is less than a third number, the at least one configuration may indicate a precoding matrix in which non-zero values ​​are mapped to the second set of antenna port elements in two antenna port groups. Alternatively or additionally, if the number of antenna port elements in the first and second sets of antenna port elements is less than a third number, the at least one configuration may indicate a precoding matrix in which non-zero values ​​are mapped to the third set of antenna port elements that are not in the four antenna port group or the two antenna port group. In other embodiments, the at least one configuration may indicate that a first precoding matrix having a third number of antenna port elements is to be used to map non-zero values ​​into a third number of columns in the precoding matrix.

[0289] In some embodiments, when the number of layers is 8, there may be only one non-coherent precoding matrix (Set_n8_1). A non-coherent precoding matrix may always be included.

[0290] In some embodiments, when the number of layers (represented as "v") is 7, there may be only one non-coherent precoding matrix. A non-coherent precoding matrix may always be included. Table 48 shows examples of non-coherent precoding matrices. TIFF2025511321001139.tif55168

[0291] For example, if the fourth number (denoted as "L") of columns of the precoding matrix having non-zero values ​​is 7, the non-zero values ​​may be mapped to seven AP_i+1 indices. If L is 8, the non-zero values ​​may be mapped to C(L,7) AP_i+1 indices. Otherwise, a non-coherent precoder p_n7_1 is included. In some embodiments, the values ​​of AP_i included in the 4-port group may be used first, then the values ​​of AP_i included in the 2-port group may be used, and then the values ​​of AP_i not included in either the 4-port group or the 2-port group may be used. If there are more than seven available values ​​of AP_i, the lowest seven indices are used. For example, if N1 is 2 or N2 is 2, p_n7_1 may be included. Alternatively, if N1 is 1 or N2 is 1 and M1 is 1, AP_i included in the 4-port group and the 2-port group may be used, and the AP with the lower value in the remaining two APs may be used. In some embodiments, if N1 is 1 or N2 is 1 and M1 is 0, AP_i included in the 4-port group may be used, and the three APs with lower values ​​in the remaining four APs may be used. Alternatively, the first seven APs in config_n1 may be used to map the value 1 into the seven columns.

[0292] In some embodiments, if the number of layers (represented as "v") is 6, there may be only one non-coherent precoding matrix. A non-coherent precoding matrix may always be included. Table 49 shows examples of non-coherent precoding matrices. TIFF2025511321001140.tif56168

[0293] For example, if the fourth number (denoted as “L”) of columns of the precoding matrix having non-zero values ​​is 6, the non-zero values ​​may be mapped to six AP_i+1 indices. In some embodiments, if L is greater than 6, the non-zero values ​​may be mapped to C(L,6) AP_i+1 indices. Otherwise, a non-coherent p_n6_1 precoder may be included. Alternatively, values ​​of AP_i included in 4-port groups may be used first, then values ​​of AP_i included in 2-port groups, and then values ​​of AP_i not included in either 4-port or 2-port groups. If there are more than six available values ​​of AP_i, the lowest six indices may be used. In some other embodiments, the first six APs in config_n1 may be used to map the value 1 into the six columns.

[0294] In some embodiments, when the number of layers (represented as "v") is 5, there may be only one non-coherent precoding matrix. A non-coherent precoding matrix may always be included. Table 50 shows examples of non-coherent precoding matrices. TIFF2025511321001141.tif56168

[0295] For example, if the fourth number (denoted as “L”) of columns of the precoding matrix having non-zero values ​​is 5, the non-zero values ​​may be mapped to six AP_i+1 indices. Alternatively, if L is greater than 5, the non-zero values ​​may be mapped to C(L,5) AP_i+1 indices. Otherwise, a non-coherent precoder p_n5_1 may be included. In some embodiments, values ​​of AP_i included in a 4-port group may be used first, then values ​​of AP_i included in a 2-port group may be used, and then values ​​of AP_i not included in either a 4-port group or a 2-port group may be used. If there are more than five available values ​​of AP_i, the lowest five indices may be used. In some other embodiments, the first five APs in config_n1 may be used to map the value 1 into the five columns.

[0296] In some embodiments, if the number of layers (represented as "v") is 4, there may be only one non-coherent precoding matrix. A non-coherent precoding matrix may always be included. Table 51 shows examples of non-coherent precoding matrices. TIFF2025511321001142.tif57168

[0297] For example, if the fourth number (denoted as "L") of columns of the precoding matrix having non-zero values ​​is 4, the non-zero values ​​may be mapped to four AP_i+1 indices. Alternatively, if L is greater than 4, the non-zero values ​​may be mapped to C(L,4) AP_i+1 indices. Otherwise, a non-coherent p_n4_1 precoder may be included.

[0298] In some embodiments, the value of AP_i included in the 4-port group may be used first, then the value of AP_i included in the 2-port group may be used, and then the value of AP_i not included in either the 4-port group or the 2-port group may be used. If there are more than four available values ​​of AP_i, the lowest four indices are used. For example, if N1 is 1, N2 is 2, or N3 is 2, there may be two non-coherent precoders, each mapped to a value 1 on the AP_i+1 index in the column, where AP_i is in one group. As another example, if N1 is 1, or N2 is 1, or N3 is 1, there may be one non-coherent precoder, and a value 1 on the AP_i+1 index in the column, where AP_i is in this group. In another embodiment, if N1 / N2 / N3 is 0 and M1 or M2 or M3 is 2 or greater, AP_i included in M1 or M2 or M3 groups may be used, and the non-zer...

Claims

1. 1. A method of communication comprising: receiving, in a terminal device, from a network device, at least one configuration associated with a precoding matrix; receiving downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH) from the network device, the DCI including an indication of a precoding matrix index; determining a precoding matrix based on the at least one configuration and the indication; Transmitting the PUSCH based on the precoding matrix; The method includes:

2. The at least one setting may include: one or more configurations of antenna port groups; at least one antenna port group; one or more settings for the antenna pattern; One or more configurations of precoding matrix type; one or more configurations of a subset of precoding matrices; The number of antenna port groups, or The number of antenna ports in the antenna port group, Contains at least one of The method of claim 1.

3. The total number of antenna ports for the PUSCH transmission or the total number of antenna ports for a sounding reference signal (SRS) associated with the PUSCH transmission is 8. The method of claim 1.

4. and determining the precoding matrix based on a fourth number of layers indicated in the DCI, the precoding matrix comprising: a matrix having a size of 8 times the fourth number; a matrix having a size of the fourth number by 8; a matrix having said fourth number of columns, each column having eight elements; a matrix having said fourth number of rows, each row having eight elements; At least one of The method of claim 1.

5. the at least one configuration includes a first number of antenna groups, each of the antenna groups including four antenna ports, the first number being a first integer less than or equal to two; or the at least one configuration includes a second number of antenna groups, each of the antenna groups including two antenna ports, the second number being a second integer less than or equal to four; or the at least one configuration includes a third number of antenna groups, each of the antenna groups including one antenna port, the third number being a third integer less than or equal to eight; or The at least one configuration includes at least one of a subset of fully coherent preceding matrices, a subset of partially coherent preceding matrices, or a subset of non-coherent preceding matrices. The method of claim 1.

6. and transmitting capability information to the network device indicating a type of precoding matrix supported by the terminal device, the type of the precoding matrix being a fully coherent precoding matrix type, a partially coherent precoding matrix type, or a non-coherent precoding matrix type; Contains at least one of The method of claim 1.

7. and receiving an indication of a type of the precoding matrix from the network device, the type of the precoding matrix being a fully coherent precoding matrix type, a fully coherent and partially coherent and non-coherent precoding matrix type, a partially coherent precoding matrix type, a partially coherent and non-coherent precoding matrix type, or a non-coherent precoding matrix type. Contains at least one of The method of claim 1.

8. The at least one configuration includes at least one of a first fully coherent preceding matrix, a second fully coherent preceding matrix, or neither; or The at least one setting may include: the number of antenna ports in the first dimension, the number of antenna ports in the second dimension, a first discrete fourier transform (DFT) oversampling in the first dimension; or a second DFT oversampling in the second dimension; Contains candidate values ​​for at least one of The method of claim 1.

9. The at least one configuration indicates that, if there is at least one antenna port group having four antenna ports, at least one column or at least one row of the precoding matrix has four non-zero values ​​on four elements of the eight elements, the indices of the four elements being based on the indices of the four antenna ports in an antenna port group, and zero values ​​on the other four elements of the eight elements in the column or row. The method of claim 1.

10. The at least one setting indicates that, if there is at least one antenna port group having two antenna ports, at least one column or at least one row of the precoding matrix has two non-zero values ​​on two elements of the eight elements, where the indices of the two elements are based on the indices of the two antenna ports in an antenna port group, and the other six elements of the eight elements in the column or row are zero values. The method of claim 1.

11. The at least one setting indicates that if there is at least one antenna port group having one antenna port, at least one column or at least one row of the precoding matrix has one non-zero value on one element of the eight elements, the non-zero value being one, and the index of the one element is based on the index of the antenna port in one antenna port group, and the other seven elements of the eight elements in the column or row are zero values. The method of claim 1.

12. Upon determining that the third number is less than or equal to the fourth number, a set of non-coherent precoding matrices associated with the fourth number is available for the PUSCH, and each column or row of the non-coherent precoding matrix has one non-zero value on one element of the eight elements, the non-zero value being one, an index of the one element based on an index of the antenna port in one antenna port group and zero values ​​on the other seven elements of the eight elements in the column or row, and an index of the one element in a different column or different row based on a different antenna port group; or Upon determining that the third number is greater than the fourth number, a set of non-coherent precoding matrices associated with the fourth number is not available for the PUSCH; or Upon determining that the third number is not configured, the set of non-coherent precoding matrices is not available for the PUSCH; or According to the determination that the third number is at least one of 1, 2, 3, 4, 5, 6, 7, 8, the set of non-coherent precoding matrices includes at least a precoding matrix in which each column or each row of a precoding matrix has one non-zero value on one element of the eight elements, the non-zero value being one, and the index of the one element is based on the column or row index, and the other seven elements of the eight elements in the column or row are zero values; or According to the determination that the third number is at least one of 1, 2, 3, and 4, the set of non-coherent precoding matrices includes at least a precoding matrix in which each column or each row of the precoding matrix has one non-zero value on one element of the first four elements, the non-zero value being one, and the index of the one element is based on the index of the column or row, and the other seven elements in the column or row have zero values. The method of claim 1.

13. According to a determination that the third number is the same as the fourth number, the set of non-coherent precoding matrices includes at least a precoding matrix in which each column or each row of a precoding matrix has one non-zero value on one element of the eight elements, the non-zero value being one, and an index of the one element in each column or row is based on an index of each antenna port of the third number of antenna ports, and zero values ​​on the other seven elements of the eight elements in the column or row; or According to a determination that the third number is greater than the fourth number, the set of non-coherent precoding matrices includes at least a precoding matrix in which each column or each row of a precoding matrix has one non-zero value on one element of the eight elements, the non-zero value being one, and an index of the one element in each column or row is based on an index of one antenna port, the antenna port being one of the fourth number of antenna ports of the third number of antenna ports, with zero values ​​on the other seven elements of the eight elements in the column or row; or In accordance with a determination that the third number is smaller than the fourth number, a non-coherent precoding matrix associated with the fourth number is not available for the PUSCH. The method of claim 1.

14. The at least one configuration includes an order of eight antenna ports, and the set of non-coherent precoding matrices associated with a fourth number includes at least a precoding matrix in which each column or row of a precoding matrix has one non-zero value on one element of the eight elements, the non-zero value being one, and an index of the one element in each column or row is based on an index of an antenna port, the antenna port being one of the antenna ports of a first fourth number of the order of eight antenna ports, and zero values ​​on the other seven of the eight elements in the column or row. The method of claim 1.

15. The at least one configuration indicates a precoding matrix in which non-zero values ​​are mapped to a first set of antenna port elements in a four antenna port group. The method of claim 1.

16. In accordance with a determination that a number of antenna port elements in the first set of antenna port elements is less than a third number, the at least one configuration indicates a precoding matrix in which non-zero values ​​are mapped to antenna port elements of a second set in a two-antenna port group. The method of claim 15.

17. In accordance with a determination that a number of antenna port elements in the first and second sets of antenna port elements is less than a third number, the at least one configuration indicates a precoding matrix in which non-zero values ​​are mapped to antenna port elements of a third set that are not in the four antenna port group or the two antenna port group. The method of claim 15.

18. The at least one configuration indicates that a precoding matrix having a first third number of antenna port elements is used to map non-zero values ​​into the third number of columns in the precoding matrix. The method of claim 1.

19. receiving information from the network device indicating that the PUSCH is scheduled to be associated with eight antenna ports or associated with an SRS having eight antenna ports; The DCI indicates a fourth number of layers that is equal to or greater than a minimum number of layers, the minimum number of layers being one of 4, 5, 6, 7, or 8, the minimum number of layers being predetermined or configured via a higher layer. The method of claim 1.

20. receiving information from the network device indicating that the tier fourth number is one of 1, 2, 3, or 4; The PUSCH is scheduled in association with one, two or four antenna ports, or in association with an SRS having one, two or four antenna ports. The method of claim 1.

21. and receiving a configuration for a set of SRS resources from the network device, wherein a first subset of SRS resources in the set of SRS resources is configured to have eight SRS ports and a second subset of SRS resources in the set of SRS resources is configured to have a number of SRS ports equal to or less than four. The method of claim 1.

22. receiving, from the network device, information indicating that the PUSCH is scheduled to be associated with eight antenna ports or associated with an SRS having eight antenna ports, the method further comprising: and applying at least one of a subset of precoding matrices or a subset number of layers prior to receiving the at least one configuration. The method of claim 1.

23. The DCI indicates the fourth number of layers in a separate field or in combination in an antenna port field, and the DCI indicates a precoding matrix based on the fourth number of layers. The method of claim 1.

24. and receiving information from the network device indicating that the PUSCH is scheduled to be associated with eight antenna ports or associated with an SRS having eight antenna ports, wherein the DCI includes, for a layer number greater than five, modulation and coding scheme (MCS), new data indicator (NDI), or Redundancy version (RV), Contains at least one of The method of claim 1.

25. 1. A method of communication comprising: transmitting, in the network device, to a terminal device, at least one configuration associated with a precoding matrix; transmitting downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH) to the terminal device, the DCI including an indication of a precoding matrix index; receiving the PUSCH based on the precoding matrix; The method includes:

26. The at least one setting may include: one or more configurations of antenna port groups; at least one antenna port group; one or more settings for the antenna pattern; One or more configurations of precoding matrix type; one or more configurations of a subset of precoding matrices; The number of antenna port groups, or The number of antenna ports in the antenna port group, Contains at least one of 26. The method of claim 25.

27. The total number of antenna ports for the PUSCH transmission or the total number of antenna ports for a sounding reference signal (SRS) associated with the PUSCH transmission is 8.

26. The method of claim 25.

28. The DCI indicates a fourth number of layers, and the precoding matrix is a matrix having a size of 8 times the fourth number; a matrix having a size of the fourth number by 8; a matrix having said fourth number of columns, each column having eight elements; a matrix having said fourth number of rows, each row having eight elements; At least one of 26. The method of claim 25.

29. the at least one configuration includes a first number of antenna groups, each of the antenna groups including four antenna ports, the first number being a first integer less than or equal to two; or the at least one configuration includes a second number of antenna groups, each of the antenna groups including two antenna ports, the second number being a second integer less than or equal to four; or the at least one configuration includes a third number of antenna groups, each of the antenna groups including one antenna port, the third number being a third integer less than or equal to eight; or The at least one configuration includes at least one of a subset of fully coherent preceding matrices, a subset of partially coherent preceding matrices, or a subset of non-coherent preceding matrices.

26. The method of claim 25.

30. and receiving capability information from the terminal device indicating a type of precoding matrix supported by the terminal device, the type of the precoding matrix being a fully coherent precoding matrix type, a partially coherent precoding matrix type, or a non-coherent precoding matrix type; Contains at least one of 26. The method of claim 25.

31. and transmitting an indication of a type of the precoding matrix to the terminal device, the type of the precoding matrix being a fully coherent precoding matrix type, a fully coherent and partially coherent and non-coherent precoding matrix type, a partially coherent precoding matrix type, a partially coherent and non-coherent precoding matrix type, or a non-coherent precoding matrix type. Contains at least one of 26. The method of claim 25.

32. The at least one configuration includes at least one of a first fully coherent preceding matrix, a second fully coherent preceding matrix, or neither; or The at least one setting may include: the number of antenna ports in the first dimension, the number of antenna ports in the second dimension, a first discrete fourier transform (DFT) oversampling in the first dimension; or a second DFT oversampling in the second dimension; Contains candidate values ​​for at least one of 26. The method of claim 25.

33. The at least one configuration indicates that, if there is at least one antenna port group having four antenna ports, at least one column or at least one row of the precoding matrix has four non-zero values ​​on four elements of the eight elements, the indices of the four elements being based on the indices of the four antenna ports in an antenna port group, and zero values ​​on the other four elements of the eight elements in the column or row.

26. The method of claim 25.

34. The at least one setting indicates that, if there is at least one antenna port group having two antenna ports, at least one column or at least one row of the precoding matrix has two non-zero values ​​on two elements of the eight elements, where the indices of the two elements are based on the indices of the two antenna ports in an antenna port group, and the other six elements of the eight elements in the column or row are zero values.

26. The method of claim 25.

35. The at least one setting indicates that if there is at least one antenna port group having one antenna port, at least one column or at least one row of the precoding matrix has one non-zero value on one element of the eight elements, the non-zero value being one, and the index of the one element is based on the index of the antenna port in one antenna port group, and the other seven elements of the eight elements in the column or row are zero values.

26. The method of claim 25.

36. Upon determining that the third number is less than or equal to the fourth number, a set of non-coherent precoding matrices associated with the fourth number is available for the PUSCH, and each column or row of the non-coherent precoding matrix has one non-zero value on one element of the eight elements, the non-zero value being one, an index of the one element based on an index of the antenna port in one antenna port group and zero values ​​on the other seven elements of the eight elements in the column or row, and an index of the one element in a different column or different row based on a different antenna port group; or Upon determining that the third number is greater than the fourth number, a set of non-coherent precoding matrices associated with the fourth number is not available for the PUSCH; or Upon determining that the third number is not configured, the set of non-coherent precoding matrices is not available for the PUSCH; or According to the determination that the third number is at least one of 1, 2, 3, 4, 5, 6, 7, 8, the set of non-coherent precoding matrices includes at least a precoding matrix in which each column or each row of a precoding matrix has one non-zero value on one element of the eight elements, the non-zero value being one, and the index of the one element is based on the column or row index, and the other seven elements of the eight elements in the column or row are zero values; or According to the determination that the third number is at least one of 1, 2, 3, and 4, the set of non-coherent precoding matrices includes at least a precoding matrix in which each column or each row of the precoding matrix has one non-zero value on one element of the first four elements, the non-zero value being one, and the index of the one element is based on the index of the column or row, and the other seven elements in the column or row have zero values.

26. The method of claim 25.

37. According to a determination that the third number is the same as the fourth number, the set of non-coherent precoding matrices includes at least a precoding matrix in which each column or each row of a precoding matrix has one non-zero value on one element of the eight elements, the non-zero value being one, and an index of the one element in each column or row is based on an index of each antenna port of the third number of antenna ports, and zero values ​​on the other seven elements of the eight elements in the column or row; or According to a determination that the third number is greater than the fourth number, the set of non-coherent precoding matrices includes at least a precoding matrix in which each column or each row of a precoding matrix has one non-zero value on one element of the eight elements, the non-zero value being one, and an index of the one element in each column or row is based on an index of one antenna port, the antenna port being one of the fourth number of antenna ports of the third number of antenna ports, with zero values ​​on the other seven elements of the eight elements in the column or row; or In accordance with a determination that the third number is smaller than the fourth number, a non-coherent precoding matrix associated with the fourth number is not available for the PUSCH.

26. The method of claim 25.

38. The at least one configuration includes an order of eight antenna ports, and the set of non-coherent precoding matrices associated with the fourth number includes at least a precoding matrix in which each column or row of a precoding matrix has one non-zero value on one element of the eight elements, the non-zero value being one, and an index of the one element in each column or row is based on an index of an antenna port, the antenna port being one of the antenna ports of a first fourth number of the order of eight antenna ports, and zero values ​​on the other seven of the eight elements in the column or row.

26. The method of claim 25.

39. The at least one configuration indicates a precoding matrix in which non-zero values ​​are mapped to a first set of antenna port elements in a four antenna port group.

26. The method of claim 25.

40. In accordance with a determination that a number of antenna port elements in the first set of antenna port elements is less than the third number, the at least one configuration indicates a precoding matrix in which non-zero values ​​are mapped to antenna port elements of a second set in a two-antenna port group.

40. The method of claim 39.

41. In accordance with a determination that a number of antenna port elements in the first and second sets of antenna port elements is less than the third number, the at least one configuration indicates a precoding matrix in which non-zero values ​​are mapped to antenna port elements of a third set that are not in the four antenna port group or the two antenna port group.

40. The method of claim 39.

42. The at least one configuration indicates that a precoding matrix having a first third number of antenna port elements is used to map non-zero values ​​into the third number of columns in the precoding matrix.

26. The method of claim 25.

43. The method further includes transmitting information indicating that the PUSCH is associated with eight antenna ports or is associated with an SRS having eight antenna ports and scheduled to the terminal device, The DCI indicates a fourth number of layers that is equal to or greater than a minimum number of layers, the minimum number of layers being one of 4, 5, 6, 7, or 8, the minimum number of layers being predetermined or configured via a higher layer.

26. The method of claim 25.

44. transmitting, to the terminal device, information indicating that the fourth number of layers is one of 1, 2, 3, and 4; The PUSCH is scheduled in association with one, two or four antenna ports, or in association with an SRS having one, two or four antenna ports.

26. The method of claim 25.

45. and transmitting to the terminal device a configuration for a set of SRS resources, wherein a first subset of SRS resources in the set of SRS resources is configured to have eight SRS ports and a second subset of SRS resources in the set of SRS resources is configured to have a number of SRS ports equal to or less than four.

26. The method of claim 25.

46. Transmitting information indicating that the PUSCH is associated with eight antenna ports or is associated with an SRS having eight antenna ports and scheduled to the terminal device; 26. The method of claim 25 further comprising:

47. The DCI indicates the fourth number of layers in a separate field or in combination in an antenna port field, and the DCI indicates a precoding matrix based on the fourth number of layers.

26. The method of claim 25.

48. and transmitting, to the terminal device, information indicating that the PUSCH is associated with eight antenna ports or is associated with an SRS having eight antenna ports and scheduled, wherein the DCI includes, for a layer number greater than 5, Modulation and coding scheme (MCS), a new data indicator (NDI), or Redundancy version (RV), The method of claim 1 , comprising at least one of:

49. A processor; a memory coupled to the processor and storing instructions; The instructions, when executed by the processor, perform a method according to any one of claims 1 to 24. Terminal device.

50. 1. A network device comprising: a processor; and a memory coupled to the processor and storing instructions, The instructions, when executed by the processor, perform a method according to any one of claims 25 to 48. Network device.

51. storing instructions which, when executed on at least one processor, cause said at least one processor to carry out a method according to any one of claims 1 to 24; Computer-readable medium.

52. storing instructions which, when executed on at least one processor, cause said at least one processor to carry out a method according to any one of claims 25 to 48; Computer-readable medium.

53. storing instructions which, when executed on at least one processor, cause said at least one processor to perform a method according to any one of claims 1 to 24 or 25 to 48; Computer-readable medium.

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