Precoding method and device, communication equipment and storage medium

Abstract

The invention relates to a precoding method and device, communication equipment, a storage medium and a computer program product. The method comprises the steps that based on the number of antenna ports and a target mapping table, the number of polarization direction ports corresponding to the number of antenna ports and an oversampling numerical value are determined, the number of target transmission layers belongs to a first target transmission layer number set, and the target mapping table is a mapping table corresponding to a target codebook type; and performing precoding based on the polarization direction port number, the oversampling numerical value and a target precoding model corresponding to the target transmission layer number to obtain a precoding result. By adopting the method, the construction of the multi-port codebook is realized by expanding the type 1 codebook and defining the arrangement and combination of a single-sided board and multiple panels under the condition of multiple ports, so that the pre-coding performance of multiple CSI-RS ports can be realized, and meanwhile, the lower complexity of coding and the lower signaling overhead are ensured.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a precoding method, apparatus, communication device, storage medium, and computer program product. Background Technology

[0002] With the development of massive MIMO technology, the number of antennas supported by base stations and user terminals is constantly increasing. The MIMO enhancement project in 3GPP release-19 explicitly supports precoding with up to 128 CSI-RS ports. However, the current NR protocol only supports codebook precoding schemes with a maximum of 32 CSI-RS ports. Therefore, CSI protocol enhancement is necessary.

[0003] In the NR protocol of related technologies, precoding based on Type-I and Type II codebooks is supported for up to 32 CSI-RS ports. Type-I codebooks have lower complexity and less CSI feedback overhead, but slightly worse precoding performance; Type-II codebook precoding schemes are the opposite. When the number of CSI-RS ports increases to 128, the problems of precoding matrix search complexity and CSI feedback overhead become more prominent. How to ensure precoding performance across multiple CSI-RS ports while maintaining low complexity and signaling overhead is a pressing issue for CSI enhancement. Summary of the Invention

[0004] This application provides a precoding method, apparatus, communication device, storage medium, and computer program product that can maintain low complexity and signaling overhead while ensuring the precoding performance of multiple CSI-RS ports.

[0005] A precoding method applied to a terminal, the method comprising:

[0006] Based on the number of antenna ports and the target mapping table, the number of polarization direction ports and the oversampling value corresponding to the number of antenna ports are determined. The target transmission layer number belongs to the first target transmission layer number set, and the target mapping table is the mapping table corresponding to the target codebook type.

[0007] Precoding is performed based on the target precoding model corresponding to the number of polarization direction ports, oversampling values, and target transmission layer number to obtain the precoding result.

[0008] In one embodiment, the first target transmission layer set includes 1 to 4 layers.

[0009] In one embodiment, the target precoding model corresponding to the target transmission layer number is the first codebook model.

[0010] In one embodiment, the target precoding model corresponding to the target transmission layer number is either a first codebook model or a second codebook model.

[0011] In one embodiment, when the target number of transport layers is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number; when the target number of transport layers is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0012] In one embodiment, when the target number of transport layers is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is greater than or equal to the target number; when the target number of transport layers is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is greater than or equal to the target number.

[0013] In one embodiment, the first target transmission layer set includes 1 to 8 layers.

[0014] In one embodiment, the target precoding model corresponding to the target transmission layer number is the first codebook model.

[0015] In one embodiment, the target precoding model corresponding to the target transmission layer number is either a first codebook model or a second codebook model.

[0016] In one embodiment, when the target number of transport layers is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number; when the target number of transport layers is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0017] In one embodiment, when the target number of transport layers is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number; when the target number of transport layers is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0018] In one embodiment, the target codebook type of the terminal is a Type I single-panel codebook type, and the target mapping table is a mapping table corresponding to the Type I single-panel codebook. The mapping table includes the mapping relationship between the number of antenna ports and the number of polarization direction ports, and the mapping relationship between the number of antenna ports and the oversampled value. The number of polarization direction ports includes a first polarization direction port number and a second polarization direction port number, and the oversampled value includes a first oversampled value and a second oversampled value.

[0019] In one embodiment, the target codebook type of the terminal is a type I multi-panel codebook type, and the target mapping table is a mapping table corresponding to the type I multi-panel codebook. The mapping table includes the mapping relationship between the number of antenna ports and the number of polarization direction ports, and the mapping relationship between the number of antenna ports and the oversampled value. The number of polarization direction ports includes the number of first polarization direction ports, the number of second polarization direction ports, and the number of third polarization direction ports. The oversampled value includes the first oversampled value and the second oversampled value.

[0020] In one embodiment, the number of antenna ports includes any one of 48, 64, 96, and 128.

[0021] In one embodiment, the target codebook type of the terminal is a Type I single-panel codebook type, and the codebook type parameter of the terminal is configured as a Type I single-panel codebook.

[0022] In one embodiment, the target codebook type of the terminal is a type I multi-panel codebook type, and the codebook type parameter of the terminal is configured as a type I multi-panel codebook.

[0023] In one embodiment, the method further includes:

[0024] If the target transmission layer number belongs to the second target layer number set, the PMI value is determined based on the first codebook index, the second codebook index, the third codebook index, and the fourth codebook index; if the target transmission layer number does not belong to the second target layer number set, the PMI value is determined based on the first codebook index, the second codebook index, and the third codebook index.

[0025] In one embodiment, the second target set of layers includes 2 layers, 3 layers, and 4 layers.

[0026] In one embodiment, the method further includes: if the target transmission layer number is 2 layers, then uploading the data stream corresponding to the 2 layers through a target mapping, wherein the target mapping represents the mapping from the third codebook index to the first parameter and the second parameter, and the target mapping is determined based on the first preset table data.

[0027] In one embodiment, the method further includes: if the target transmission layer is 3 or 4 layers, then uploading the data stream corresponding to the 3rd or 4th layer through a target mapping, wherein the target mapping represents the mapping from the third codebook index to the first parameter and the second parameter, and the target mapping is determined based on second preset table data.

[0028] A precoding device, applied to a terminal, the device comprising:

[0029] The first determining module is used to determine the number of polarization direction ports and the oversampling value corresponding to the number of antenna ports based on the number of antenna ports and the target mapping table. The target transmission layer number belongs to the first target transmission layer number set, and the target mapping table is the mapping table corresponding to the target codebook type.

[0030] The precoding module is used to perform precoding based on the target precoding model corresponding to the number of polarization direction ports, oversampling values, and target transmission layer number, and obtain the precoding result.

[0031] In one embodiment, the first target transmission layer set includes 1 to 4 layers.

[0032] In one embodiment, the target precoding model corresponding to the target transmission layer number is the first codebook model.

[0033] In one embodiment, the target precoding model corresponding to the target transmission layer number is either a first codebook model or a second codebook model.

[0034] In one embodiment, when the target number of transport layers is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number; when the target number of transport layers is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0035] In one embodiment, when the target number of transport layers is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is greater than or equal to the target number; when the target number of transport layers is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is greater than or equal to the target number.

[0036] In one embodiment, the first target transmission layer set includes 1 to 8 layers.

[0037] In one embodiment, the target precoding model corresponding to the target transmission layer number is the first codebook model.

[0038] In one embodiment, the target precoding model corresponding to the target transmission layer number is either a first codebook model or a second codebook model.

[0039] In one embodiment, when the target number of transport layers is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number; when the target number of transport layers is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0040] In one embodiment, when the target number of transport layers is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number; when the target number of transport layers is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0041] In one embodiment, the target codebook type of the terminal is a Type I single-panel codebook type, and the target mapping table is a mapping table corresponding to the Type I single-panel codebook. The mapping table includes the mapping relationship between the number of antenna ports and the number of polarization direction ports, and the mapping relationship between the number of antenna ports and the oversampled value. The number of polarization direction ports includes a first polarization direction port number and a second polarization direction port number, and the oversampled value includes a first oversampled value and a second oversampled value.

[0042] In one embodiment, the target codebook type of the terminal is a type I multi-panel codebook type, and the target mapping table is a mapping table corresponding to the type I multi-panel codebook. The mapping table includes the mapping relationship between the number of antenna ports and the number of polarization direction ports, and the mapping relationship between the number of antenna ports and the oversampled value. The number of polarization direction ports includes the number of first polarization direction ports, the number of second polarization direction ports, and the number of third polarization direction ports. The oversampled value includes the first oversampled value and the second oversampled value.

[0043] In one embodiment, the number of antenna ports includes any one of 48, 64, 96, and 128.

[0044] In one embodiment, the target codebook type of the terminal is a Type I single-panel codebook type, and the codebook type parameter of the terminal is configured as a Type I single-panel codebook.

[0045] In one embodiment, the target codebook type of the terminal is a type I multi-panel codebook type, and the codebook type parameter of the terminal is configured as a type I multi-panel codebook.

[0046] In one embodiment, the device further includes:

[0047] The second determining module is used to determine the PMI value based on the first codebook index, the second codebook index, the third codebook index, and the fourth codebook index if the target transmission layer number belongs to the second target layer number set; and to determine the PMI value based on the first codebook index, the second codebook index, and the third codebook index if the target transmission layer number does not belong to the second target layer number set.

[0048] In one embodiment, the second target set of layers includes 2 layers, 3 layers, and 4 layers.

[0049] In one embodiment, the device further includes:

[0050] The second determining module is further configured to upload the data stream corresponding to the second layer through a target mapping if the target transmission layer number is 2 layers. The target mapping represents the mapping between the third codebook index and the first parameter and the second parameter. The target mapping is determined based on the first preset table data.

[0051] In one embodiment, the device further includes:

[0052] The second determining module is further configured to upload the data stream corresponding to the 3rd or 4th layer through a target mapping if the target transmission layer is 3 or 4 layers. The target mapping represents the mapping from the third codebook index to the first parameter and the second parameter. The target mapping is determined based on the second preset table data.

[0053] A communication device, comprising: a processor;

[0054] The processor is used to determine the number of polarization direction ports and the oversampling value corresponding to the number of antenna ports based on the number of antenna ports and the target mapping table. The number of target transmission layers belongs to the first set of target transmission layers, and the target mapping table is the mapping table corresponding to the target codebook type.

[0055] The processor is also used to perform precoding based on the target precoding model corresponding to the number of polarization direction ports, oversampling values, and target transmission layers, to obtain precoding results.

[0056] A computer-readable storage medium having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0057] Based on the number of antenna ports and the target mapping table, the number of polarization direction ports and the oversampling value corresponding to the number of antenna ports are determined. The target transmission layer number belongs to the first target transmission layer number set, and the target mapping table is the mapping table corresponding to the target codebook type.

[0058] Precoding is performed based on the target precoding model corresponding to the number of polarization direction ports, oversampling values, and target transmission layer number to obtain the precoding result.

[0059] A computer program product includes a computer program, characterized in that, when executed by a processor, the computer program implements the precoding method provided in the embodiments of this application, the method being:

[0060] Based on the number of antenna ports and the target mapping table, the number of polarization direction ports and the oversampling value corresponding to the number of antenna ports are determined. The target transmission layer number belongs to the first target transmission layer number set, and the target mapping table is the mapping table corresponding to the target codebook type.

[0061] Precoding is performed based on the target precoding model corresponding to the number of polarization direction ports, oversampling values, and target transmission layer number to obtain the precoding result.

[0062] The aforementioned precoding method, apparatus, communication equipment, storage medium, and computer program product include the following steps: determining the number of polarization direction ports and oversampling values ​​corresponding to the number of antenna ports based on the number of antenna ports and a target mapping table, wherein the target transmission layer number belongs to a first target transmission layer set, and the target mapping table is a mapping table corresponding to the target codebook type; performing precoding based on the number of polarization direction ports, oversampling values, and the target precoding model corresponding to the target transmission layer number to obtain the precoding result. By employing this method, through the extension of Type 1 codebooks, the arrangement and combination of single-panel and multi-panel codebooks in multi-port scenarios are clarified, enabling the construction of multi-port codebooks. This achieves multi-CSI-RS port precoding performance while ensuring low coding complexity and low signaling overhead. Attached Figure Description

[0063] Figure 1 This is a diagram illustrating the application environment of a precoding method in one embodiment;

[0064] Figure 2 This is a flowchart illustrating a precoding method in one embodiment;

[0065] Figure 3 This is a structural block diagram of a precoding device in one embodiment;

[0066] Figure 4 This is an internal structural diagram of a communication device in one embodiment. Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0068] Figure 1 This is a schematic diagram illustrating an application scenario of a precoding method provided in an embodiment of this application. For example... Figure 1 As shown, this scenario includes a user terminal 100 and an access network device 200. The user terminal 100 and the access network device 200 transmit data via a network.

[0069] The access network equipment 200 can be a base station (BTS) in Global System for Mobile communication (GSM) or Code Division Multiple Access (CDMA), a base station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNB or eNodeB) in LTE, a relay station or access point, or a base station in a 5G network, etc., and is not limited here.

[0070] User terminal 100 may be a wireless terminal, which can be a device providing voice and / or other service data connectivity to a user, a handheld device with wireless connectivity, or other processing devices connected to a wireless modem. The wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN). The wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) or a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile device, exchanging voice and / or data with the radio access network. The wireless terminal may also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile, remote station, remote terminal, access terminal, user terminal, user agent, user device, or user equipment, without limitation herein.

[0071] With the development of massive MIMO (Multiple-Input Multiple-Output) technology, the number of antennas supported by base stations and user terminals is constantly increasing. In the MIMO enhancement project of 3GPP release-19, it has been clearly stated that precoding with up to 128 CSI-RS ports will be supported. However, the traditional NR protocol only supports codebook precoding schemes with a maximum of 32 CSI-RS ports, which is no longer a match. To support precoding with up to 128 CSI-RS ports, CSI-related protocol enhancements are needed, as well as the determination of codebooks and precoding schemes suitable for multiple ports.

[0072] In existing NR protocols, Type-I and Type-II codebook-based precoding only supports a maximum of 32 CSI-RS ports. Type-I codebooks have lower complexity and less CSI feedback overhead, but slightly lower precoding performance, while Type-II codebook precoding schemes are the opposite. Expanding the number of CSI-RS ports to 128 leads to problems with precoding matrix search complexity and CSI feedback overhead. Therefore, how to achieve high precoding performance with multiple CSI-RS ports while maintaining low complexity and signaling overhead is a pressing issue.

[0073] Based on the aforementioned traditional technologies, this application provides a precoding method, which relates to a channel state information acquisition method based on CSI-RS, for 5G-A and 6G systems. By determining the multi-port arrangement combination of single-panel and multi-panel, a multi-port DFT codebook is constructed. This method can support Type-I two-level precoding matrix selection strategies up to 128 CSI-RS ports, and can also support multi-stream transmission, reducing the complexity of precoding and improving the accuracy of precoding. It also has high practicality.

[0074] It should be noted that the beneficial effects or technical problems solved by the embodiments of this application are not limited to this one, but may also be other implicit or related problems. For details, please refer to the description of the embodiments below.

[0075] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0076] In one embodiment, such as Figure 2 As shown, a precoding method is provided, which is applied to... Figure 1 Taking the user terminal in the example, the explanation includes the following steps:

[0077] Step 202: Based on the number of antenna ports and the target mapping table, determine the number of polarization direction ports and the oversampling value corresponding to the number of antenna ports.

[0078] The target mapping table is a mapping table corresponding to the target codebook type, which can include single-codebook type and multi-codebook type. The number of antenna ports can be the number of antenna ports supported by the current user terminal, or it can be the number of antenna ports supported by the base station during the communication between the current user terminal and the base station. The target mapping table is a mapping table corresponding to the target codebook type, which can include the correspondence between the number of antenna ports and the number of polarization direction ports, as well as the correspondence between the number of antenna ports and the oversampled value.

[0079] The number of polarization direction ports can include the number of ports in a first polarization direction and the number of ports in a second polarization direction. The number of ports in the first polarization direction can be the number of logical antenna ports (N1) in the first polarization direction, and the number of ports in the second polarization direction can be the number of logical antenna ports (N2) in the second polarization direction. Optionally, the number of polarization direction ports can also include the number of logical antenna ports (Ng) in a third polarization direction. The first polarization direction can be a horizontal direction, and the second polarization direction can be a vertical direction. The oversampling value represents the oversampling factor of the discrete Fourier transform (DFT) in the polarization direction. The oversampling value can include the oversampling factor of the discrete Fourier transform in the first polarization direction and can also include the oversampling factor of the DFT in the second polarization direction.

[0080] Specifically, before transmitting data to the base station, the terminal can pre-encode the data to be transmitted. The specific pre-encoding process may include: the terminal determining the current number of antenna ports, filtering the target mapping table based on the number of antenna ports, and determining the number of polarization direction ports and oversampling values ​​corresponding to the number of antenna ports.

[0081] In one example, determining the target mapping table may include: the terminal determining the current codebook type and the set of ports supported by the current codebook type; and based on the current codebook type and the set of ports supported by the current codebook type, determining a target mapping table that matches both the codebook type and the set of ports supported by the current codebook type. The set of ports supported by the current codebook type may include 64 and 128 CSI-RS port extensions, or the set of ports supported by the current codebook type may also include 48, 64, 96, and 128 CSI-RS port extensions.

[0082] Step 204: Perform precoding based on the target precoding model corresponding to the number of polarization direction ports, oversampling values, and target transmission layer number to obtain the precoding result.

[0083] The target transmission layer number belongs to the first target transmission layer number set. The transmission layer number can be a transmission data stream. The first target transmission layer number set can include 1 to 4 layers, or it can include 1 to 8 layers, etc.

[0084] Specifically, the terminal can determine the target precoding model based on the target transmission layer set to which the target transmission layer belongs and the target transmission layer, and perform precoding based on the determined polarization direction port number, oversampling value and target precoding model to obtain the precoding result.

[0085] In one example, the terminal can transmit precoding results to the base station, enabling data interaction between the terminal and the base station.

[0086] In the aforementioned precoding method, based on the number of antenna ports and the target mapping table, the number of polarization direction ports and the oversampling value corresponding to the number of antenna ports are determined. The target transmission layer belongs to the first target transmission layer set, and the target mapping table is the mapping table corresponding to the target codebook type. Precoding is performed based on the target precoding model corresponding to the number of polarization direction ports, the oversampling value, and the target transmission layer, yielding the precoding result. By adopting this method, through the extension of Type 1 codebooks, the arrangement and combination of single-panel and multi-panel codebooks in multi-port cases are clarified, realizing the construction of multi-port codebooks. This achieves multi-CSI-RS port precoding performance while ensuring low coding complexity and low signaling overhead.

[0087] In one embodiment, the first target transport layer set includes 1 to 4 layers.

[0088] Specifically, the number of CSI-RS antenna ports can be 64 or 128, and the target transmission layer set to which the target transmission layer belongs can be a first target transmission layer set, which can include 1 to 4 layers.

[0089] In one embodiment, the target precoding model corresponding to the target transport layer number is the first codebook model.

[0090] Specifically, the number of CSI-RS antenna ports can be 64 ports or 128 ports. When the first target transmission layer set to which the target transmission layer belongs is 1 to 4, the target precoding model corresponding to the target transmission layer can be the first codebook model, which can be the codebookMode=1 precoding matrix selection model.

[0091] In this embodiment, by limiting the target precoding model, multi-port precoding can be supported by constructing a multi-port DFT codebook.

[0092] In one embodiment, the target precoding model corresponding to the target transport layer number is either the first codebook model or the second codebook model.

[0093] Specifically, the number of CSI-RS antenna ports can be 64 ports or 128 ports. When the first target transmission layer set to which the target transmission layer belongs is 1 to 4, the target precoding model corresponding to the target transmission layer can be a first codebook model or a second codebook model. The first codebook model can be a codebookMode=1 precoding matrix selection model; the second codebook model can be a codebookMode=2 precoding matrix selection model.

[0094] In this embodiment, by limiting the target precoding model, multi-port precoding can be supported by constructing a multi-port DFT codebook.

[0095] In one embodiment, when the target transport layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number. When the target transport layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0096] Specifically, the preset standard can be TS38.214, and the target number can be 16. If the current target transport layer number is determined to be 3, the terminal can determine that the first codebook model is the codebook model in the first sub-table of the preset standard whose port number is less than the target number. For example, the first sub-table in the preset standard can be Table 5.2.2.2.1-7 in TS38.214, and the codebook model in the first sub-table whose port number is less than the target number can be codebookMode = 1-2,P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS <Precoding model corresponding to the sub-table.

[0097] Specifically, if the current target transport layer number is determined to be 4, the terminal can determine that the first codebook model is the codebook model in the second sub-table of the preset standard whose port number is less than the target number. For example, the second sub-table in the preset standard can be Table 5.2.2.2.1-8 in TS38.214, and the codebook model in the second sub-table whose port number is less than the target number can be codebookMode=1-2,P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS <Precoding model corresponding to the sub-table.

[0098] In this embodiment, multi-port precoding scenarios are supported. By extending the type 1 codebook, the arrangement and combination of single-panel codebooks and multi-panel codebooks in multi-port scenarios can be clearly defined, realizing multi-port DFT codebooks and improving precoding performance.

[0099] In one embodiment, when the target transport layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is greater than or equal to the target number. When the target transport layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is greater than or equal to the target number.

[0100] Specifically, the preset standard can be TS38.214, and the target number can be 16. If the current target transport layer number is determined to be 3, the terminal can determine that the first codebook model is the codebook model with a port number greater than or equal to the target number in the first sub-table of the preset standard. For example, the first sub-table in the preset standard can be Table 5.2.2.2.1-7 in TS38.214, and the codebook model with a port number greater than or equal to the target number in the first sub-table can be codebookMode = 1-2,P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS Precoding model corresponding to ≥16 sub-tables.

[0101] Specifically, if the current target transport layer number is determined to be 4, the terminal can determine that the first codebook model is the codebook model in the second sub-table of the preset standard whose port number is greater than or equal to the target number. For example, the second sub-table in the preset standard can be Table 5.2.2.2.1-8 in TS38.214, and the codebook model in the second sub-table whose port number is greater than or equal to the target number can be codebookMode = 1-2,P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS ≥ The precoding model corresponding to the sub-table.

[0102] In this embodiment, multi-port precoding scenarios are supported. By extending the type 1 codebook, the arrangement and combination of single-panel codebooks and multi-panel codebooks in multi-port scenarios can be clearly defined, realizing multi-port DFT codebooks and improving precoding performance.

[0103] In one embodiment, the first target transport layer set includes 1 to 8 layers.

[0104] Specifically, the target codebook type can be a single-panel codebook type, the corresponding number of CSI-RS antenna ports can be 64 ports or 128 ports, and the target transmission layer set to which the target transmission layer belongs can be a first target transmission layer set, which can optionally include 1 to 8 layers.

[0105] In this embodiment, multi-port precoding scenarios are supported. By extending the type 1 codebook, the arrangement and combination of single-panel codebooks and multi-panel codebooks in multi-port scenarios can be clearly defined, realizing multi-port DFT codebooks and improving precoding performance.

[0106] In one embodiment, the target precoding model corresponding to the target transport layer number is the first codebook model.

[0107] Specifically, the number of CSI-RS antenna ports can be 64 or 128, the target codebook type can be a single-panel codebook type of type 1, and when the first target transmission layer set to which the target transmission layer belongs is layer 1 to layer 8, the target precoding model corresponding to the target transmission layer can be the first codebook model, which can be the codebookMode=1 precoding matrix selection model.

[0108] In this embodiment, by limiting the target precoding model, multi-port precoding can be supported by constructing a multi-port DFT codebook.

[0109] In one embodiment, the target precoding model corresponding to the target transport layer number is either the first codebook model or the second codebook model.

[0110] Specifically, the CSI-RS antenna can have 64 or 128 ports. When the target transmission layer belongs to a set of 1 to 8 layers, the target precoding model corresponding to the target transmission layer can be either a first codebook model or a second codebook model. The first codebook model can be a codebookMode=1 precoding matrix selection model; the second codebook model can be a codebookMode=2 precoding matrix selection model. The terminal can determine the target coding model from the first and second codebook models based on actual needs.

[0111] In this embodiment, by limiting the target precoding model, multi-port precoding can be supported by constructing a multi-port DFT codebook.

[0112] In one embodiment, when the target transport layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number. When the target transport layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0113] Specifically, when the target transmission layer number belongs to the first target transmission layer set of layers 1 to 8, the preset standard can be TS38.214, and the target number can be 16. If the current target transmission layer number is determined to be 3, the terminal can determine that the first codebook model is the codebook model in the first sub-table of the preset standard whose port number is less than the target number. For example, the first sub-table in the preset standard can be Table 5.2.2.2.1-7 in TS38.214, and the codebook model in the first sub-table whose port number is less than the target number can be codebookMode = 1-2,P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS <Precoding model corresponding to the sub-table.

[0114] Specifically, if the current target transport layer number is determined to be 4, the terminal can determine that the first codebook model is the codebook model in the second sub-table of the preset standard whose port number is less than the target number. For example, the second sub-table in the preset standard can be Table 5.2.2.2.1-8 in TS38.214, and the codebook model in the second sub-table whose port number is less than the target number can be codebookMode=1-2,P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS <Precoding model corresponding to the sub-table.

[0115] In this embodiment, a codebook model with fewer ports than the target number in the sub-table of the preset standard is used as the precoding model. In fact, the precoding model is determined by the selection strategy of the two-level precoding matrix, which realizes a multi-port precoding scheme that balances low codebook complexity and high precoding performance.

[0116] In one embodiment, when the target transport layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number. When the target transport layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0117] Specifically, the preset standard can be TS38.214, and the target number can be 16. If the current target transport layer number is determined to be 3, the terminal can determine that the first codebook model is the codebook model in the first sub-table of the preset standard whose port number is less than the target number. For example, the first sub-table in the preset standard can be Table 5.2.2.2.1-7 in TS38.214, and the codebook model in the first sub-table whose port number is less than the target number can be codebookMode = 1-2,P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS <Precoding model corresponding to the sub-table.

[0118] Specifically, if the current target transport layer number is determined to be 4, the terminal can determine that the first codebook model is the codebook model in the second sub-table of the preset standard whose port number is less than the target number. For example, the second sub-table in the preset standard can be Table 5.2.2.2.1-8 in TS38.214, and the codebook model in the second sub-table whose port number is less than the target number can be codebookMode=1-2,P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS <Precoding model corresponding to the sub-table.

[0119] In this embodiment, a codebook model with fewer ports than the target number in the sub-table of the preset standard is used as the precoding model. In fact, the precoding model is determined by the selection strategy of the two-level precoding matrix, which realizes a multi-port precoding scheme that balances low codebook complexity and high precoding performance.

[0120] Optionally, when the target number of transmission layers is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is greater than or equal to the target number; when the target number of transmission layers is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is greater than or equal to the target number.

[0121] In one embodiment, when the target transport layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is greater than or equal to the target number. When the target transport layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is greater than or equal to the target number. The preset standard can be TS38.214, and the target number can be 16. If the current target transport layer number is determined to be 3, the terminal can determine that the first codebook model is the codebook model corresponding to the number of ports greater than or equal to the target number in the first sub-table of the preset standard. For example, the first sub-table in the preset standard can be Table 5.2.2.2.1-7 in TS38.214, and the codebook model in the first sub-table where the number of ports is greater than or equal to the target number can be codebookMode = 1-2,P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS <Precoding model corresponding to the sub-table.

[0122] In one embodiment, the target codebook type of the terminal is a type I single-panel codebook type, and the target mapping table is the mapping table corresponding to the type I single-panel codebook. The mapping table includes the mapping relationship between the number of antenna ports and the number of polarization direction ports, as well as the mapping relationship between the number of antenna ports and the oversampled value. The number of polarization direction ports includes the number of first polarization direction ports and the number of second polarization direction ports, and the oversampled value includes the first oversampled value and the second oversampled value.

[0123] Specifically, if the Type I single-panel codebook type can be the Type-I single-panel codebook type, then the target mapping table is the mapping table corresponding to the Type I single-panel codebook. This mapping table can include the correspondence between the number of antenna ports and the number of polarization direction ports, as well as the correspondence between the number of antenna ports and the oversampling value.

[0124] The target codebook type is Type-I single-sided codebook. The corresponding number of antenna ports can include ports in the first polarization direction and ports in the second polarization direction. The number of ports in the first polarization direction can be the number of logical antenna ports (N1) in the first polarization direction, and the number of ports in the second polarization direction can be the number of logical antenna ports (N2) in the second polarization direction. The corresponding oversampled values ​​include a first oversampled value and a second oversampled value. The first oversampled value can be the oversampling factor of the Discrete Fourier Transform in the first polarization direction, and the second oversampled value can be the oversampling factor of the Discrete Fourier Transform in the second polarization direction. The first polarization direction can be horizontal, and the second polarization direction can be vertical.

[0125] In this embodiment, by determining the structure of the mapping table when the type is Type I single-panel codebook, the array configuration under multiple port numbers can be clearly defined, the codebook for multiple ports can be obtained, the encoding of multiple ports can be realized, and the encoding performance can be improved.

[0126] In one embodiment, the target codebook type of the terminal is a type I multi-panel codebook type, and the target mapping table is the mapping table corresponding to the type I multi-panel codebook. The mapping table includes the mapping relationship between the number of antenna ports and the number of polarization direction ports, as well as the mapping relationship between the number of antenna ports and the oversampled value. The number of polarization direction ports includes the number of first polarization direction ports, the number of second polarization direction ports, and the number of third polarization direction ports. The oversampled value includes the first oversampled value and the second oversampled value.

[0127] Specifically, if the type I multi-panel codebook can be a Type-I multi-panel codebook, then the target mapping table is the mapping table corresponding to the type I multi-panel codebook. This mapping table can include the correspondence between the number of antenna ports and the number of polarization direction ports, as well as the correspondence between the number of antenna ports and the oversampling value.

[0128] The target codebook type is Type-I multi-panel codebook. The corresponding number of antenna ports can include ports in the first polarization direction, ports in the second polarization direction, and ports in the third polarization direction. The number of ports in the first polarization direction can be the number of logical antenna ports in the first polarization direction (N1), the number of ports in the second polarization direction can be the number of logical antenna ports in the second polarization direction (N2), and the number of ports in the third polarization direction can be the number of logical antenna ports in the third polarization direction (Ng). The corresponding oversampled values ​​include a first oversampled value and a second oversampled value. The first oversampled value can be the oversampling factor of the Discrete Fourier Transform in the first polarization direction, and the second oversampled value can be the oversampling factor of the Discrete Fourier Transform in the second polarization direction. The first polarization direction can be horizontal, and the second polarization direction can be vertical.

[0129] In this embodiment, by determining the structure of the mapping table when the type is Type I multi-panel codebook, the array configuration under the number of ports can be clearly defined, the codebook of multiple ports can be obtained, the encoding of multiple ports can be realized, and the encoding performance can be improved.

[0130] In one embodiment, the number of antenna ports includes any one of 48, 64, 96, and 128.

[0131] Specifically, the number of CSI-RS antenna ports can be any of 48 ports, 64 ports, 96 ports, and 128 ports.

[0132] Optionally, the antenna ports include 4-antenna ports {3000, 3001, 3002, 3003}, 8-antenna ports {3000, 3001, ..., 3007}, 12-antenna ports {3000, 3001, ..., 3011}, 16-antenna ports {3000, 3001, ..., 3015}, 24-antenna ports {3000, 3001, ..., 3023}, 32-antenna ports {3000, 3001, ..., 3031}, 48-antenna ports {3000, 3001, ..., 3047}, 64-antenna ports {3000, 3001, ..., 3063}, 96-antenna ports {3000, 3001, ..., 3095}, and 128-antenna ports {3000, 3001, ..., 3127}.

[0133] In this embodiment, by determining the precoding model under different conditions, precoding in multi-port scenarios can be realized, which can provide a reliable data foundation for multi-port precoding and further ensure the reliability of signal transmission between user terminals and base stations.

[0134] In one embodiment, the target codebook type of the terminal is a Type I single-panel codebook type, and the codebook type parameter of the terminal is configured as a Type I single-panel codebook.

[0135] Specifically, the codebook type parameter of the user terminal represents the codebook type selected by the current terminal for precoding. If the terminal configures the codebook type parameter as Type I single-panel codebook, then the target codebook type of the terminal can be determined to be Type I single-panel codebook. The codebook type parameter can be a higher-level parameter codebookType on the terminal. Configuring the codebook type parameter as Type I single-panel codebook can be done by the UE configuring the higher-level parameter codebookType as "typeI-SinglePanel".

[0136] In this embodiment, by configuring the codebook type parameter to Type I single-panel codebook, the arrangement and combination of multiple ports on a single panel can be clearly defined, reducing the complexity of the codebook and the signal feedback overhead, thereby enabling precoding that supports multiple ports.

[0137] In one embodiment, the target codebook type of the terminal is a type I multi-panel codebook type, and the codebook type parameter of the terminal is configured as type I multi-panel codebook.

[0138] Specifically, the codebook type parameter of the user terminal represents the codebook type selected by the current terminal for precoding. If the terminal configures the codebook type parameter to type I multi-panel codebook, then the target codebook type of the terminal can be determined to be type I multi-panel codebook type.

[0139] In this embodiment, by configuring the codebook type parameter to type I multi-panel codebook, the arrangement and combination of multiple panels and multiple ports can be clearly defined, reducing the complexity of the codebook and the signal feedback overhead, thereby enabling precoding that supports multiple ports.

[0140] In one embodiment, the method further includes:

[0141] If the target transport layer number belongs to the second target layer number set, the PMI value is determined based on the first codebook index, the second codebook index, the third codebook index, and the fourth codebook index. If the target transport layer number does not belong to the second target layer number set, the PMI value is determined based on the first codebook index, the second codebook index, and the third codebook index.

[0142] The second target layer set includes 2, 3, and 4 layers. The first codebook index can be i. 1,1 The second codebook index can be i 1,2 The third codebook index can be i2, and the fourth codebook index can be i. 1,3 .

[0143] Specifically, if the terminal determines that the current target transmission layer belongs to the second target layer set, that is, if the terminal determines that the current target transmission layer is layer 2, layer 3, or layer 4, then the terminal can determine the current PMI value based on the first codebook index, the second codebook index, the third codebook index, and the fourth codebook index. If the terminal determines that the current target transmission layer does not belong to the second target layer set, that is, if the terminal determines that the current target transmission layer is a layer other than layer 2, layer 3, or layer 4, then the terminal can determine the current PMI value based on the first codebook index, the second codebook index, and the third codebook index.

[0144] Optionally, when the layer number υ∈{2,3,4}, each PMI value corresponds to 4 codebook indices i 1,1 i 1,2 i2 and i 1,3 When the number of layers υ∈{2,3,4}, each PMI value corresponds to 3 codebook indices i 1,1 i 1,2 、i2.

[0145] Optionally, the codebooks for transport layer 1 (stream 1) to transport layer 8 can be determined according to tables 5 to 12 in the second preset standard, that is, the codebook corresponding to transport layer 1 can be determined according to table 5 in the second preset standard, which can be TS38.211, and table 5.2.2.2.1-5; the codebook corresponding to transport layer 2 can be determined according to table 6 in the second preset standard, which can be TS38.211, and table 5.2.2.2.1-6.

[0146] The codebook corresponding to transport layer 3 can be determined according to the seventh table in the second preset standard. The second preset standard can be TS38.211, and the seventh table can be Table 5.2.2.2.1-7. The codebook corresponding to transport layer 4 can be determined according to the eighth table in the second preset standard. The second preset standard can be TS38.211, and the fifth table can be Table 5.2.2.2.1-8.

[0147] The codebook corresponding to transport layer 5 can be determined according to the ninth table in the second preset standard. The second preset standard can be TS38.211, and the ninth table can be Table 5.2.2.2.1-9. The codebook corresponding to transport layer 6 can be determined according to the tenth table in the second preset standard. The second preset standard can be TS38.211, and the tenth table can be Table 5.2.2.2.1-10.

[0148] The codebook corresponding to transport layer 7 can be determined according to table eleven in the second preset standard, which can be TS38.211, and table five can be table 5.2.2.2.1-11; the codebook corresponding to transport layer 8 can be determined according to table twelfth in the second preset standard, which can be TS38.211, and table five can be table 5.2.2.2.1-12.

[0149] In this embodiment, by determining the codebook corresponding to each transport layer, precoding in multi-port scenarios can be achieved, providing a reliable data foundation for multi-port precoding and further ensuring the reliability of signal transmission between user terminals and base stations.

[0150] In one embodiment, the method further includes:

[0151] If the target transmission layer is 2, then the data stream corresponding to layer 2 is uploaded through the target mapping.

[0152] Here, the target mapping represents the mapping from the third codebook index to the first and second parameters, and the target mapping is determined based on the first preset table data. The third codebook index can be i 1,3 The first parameter can be k1, the second parameter can be k2, and the first preset table data can be a sub-table in the preset standard, such as Table 5.2.2.2.1-3.

[0153] Specifically, if the target transmission layer is 2, then the 2 streams are uploaded from the user terminal to the base station through target mapping. The target mapping used for 2 stream reporting can be from i 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-3.

[0154] In one embodiment, the method further includes:

[0155] If the target transmission layer is 3 or 4, then the data stream corresponding to layer 3 or 4 is uploaded through the target mapping.

[0156] Here, the target mapping represents the mapping from the third codebook index to the first and second parameters, and the target mapping is determined based on the second preset table data. The third codebook index can be i 1,3 The first parameter can be k1, the second parameter can be k2, and the second preset table data can be a sub-table in the preset standard, such as Table 5.2.2.2.1-4.

[0157] Specifically, if the target transmission layer is 3, then the 3 streams are uploaded from the user terminal to the base station through target mapping. The target mapping used for 3-stream reporting can be from i 1,3The mapping to k1 and k2, from i 1,3 The mappings to k1 and k2 can be determined based on Table 5.2.2.2.1-4. If the target transmission layer is 4, then the 4 streams are uploaded from the user terminal to the base station through the target mapping. The target mapping for 4-stream reporting can be from i 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4.

[0158] Optionally, in P CSI-RS When (number of antenna ports) < 16, the target mapping used for 3-stream reporting can be from i 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4, and the target mapping for 4-stream reporting can be from i 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4.

[0159] This embodiment provides a precoding method in the field of wireless communication technology, specifically the acquisition of CSI-RS channel state information. The target application scenarios are 5G-A or 6G communication systems. This precoding method supports precoding based on Type-I codebooks for multiple antenna ports (CSI-RS ports), enabling multi-CSI-RS port codebook precoding. It supports both single-panel and multi-panel codebook types, balancing codebook complexity and precoding accuracy while saving CSI feedback signaling overhead. In other words, this method can achieve Type-I codebook extension by explicitly defining single-panel and multi-panel multi-port arrangements, constructing multi-port DFT codebooks, and enhancing the Type-I two-level precoding matrix selection strategy to up to 128 CSI-RS ports. It also supports multi-stream transmission, balancing complexity and accuracy, and is highly practical.

[0160] In one embodiment, the implementation process for supporting 64 antenna ports and 128 antenna ports for both Type 1 single-panel codebooks and Type 1 multi-panel codebooks includes the following:

[0161] If the target codebook type is Type-1 single-panel codebook, that is, the target codebook type is Type-I single-panel codebook, then for 4-antenna ports {3000, 3001, 3002, 3003}, 8-antenna ports {3000, 3001, ..., 3007}, 12-antenna ports {3000, 3001, ..., 3011}, 16-antenna ports {3000, 3001, ..., 3015}, 24-antenna ports {3000, 3001, ..., 3023}, and 32-antenna ports {3000, 3001, ..., 3023}, the following conditions apply: 031}, 64 antenna ports {3000, 3001, ..., 3063}, and 128 antenna ports {3000, 3001, ..., 3127}, and the user terminal can be configured as typeI-SinglePanel by the higher layer parameter codebookType, that is, the terminal can configure the codebook type parameter codebookType as typeI single-panel codebook typeI-SinglePanel. Then, when the layer number υ∈{2,3,4}, each PMI value corresponds to 4 codebook indices i 1,1 i 1,2 i2 and i 1,3 When the number of layers Each PMI value corresponds to 3 codebook indices i 1,1 i 1,2 i2. υ is the transport layer number or the stream number.

[0162] If the target transport layer is 2, then the 2 streams are uploaded from the user terminal to the base station through target mapping. The target mapping used for 2 stream reporting can be from i 1,3 The mapping to k1 and k2, from i 1,3 The mappings to k1 and k2 can be determined based on Table 5.2.2.2.1-3. In P CSI-RS When (number of antenna ports) < 16, the target mapping used for 3-stream reporting can be from i 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4, and the target mapping for 4-stream reporting can be from i 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4.

[0163] The codebooks for streams 1 to 8 are given in Tables 5.2.2.2.1-5, 5.2.2.2.1-6, 5.2.2.2.1-7, 5.2.2.2.1-8, 5.2.2.2.1-9, 5.2.2.2.1-10, 5.2.2.2.1-11, and 5.2.2.2.1-12 of TS38.211. That is, the codebooks for transport layer 1 (stream 1) to transport layer 8 can be determined according to Tables 5 to 12 of the second preset standard. Specifically, the codebook for transport layer 1 can be determined according to Table 5 of the second preset standard, which can be TS38.211, and Table 5.2.2.2.1-5. The codebook for transport layer 2 can be determined according to Table 6 of the second preset standard, which can be TS38.211, and Table 5.2.2.2.1-6.

[0164] The codebook corresponding to transport layer 3 can be determined according to the seventh table in the second preset standard. The second preset standard can be TS38.211, and the seventh table can be Table 5.2.2.2.1-7. The codebook corresponding to transport layer 4 can be determined according to the eighth table in the second preset standard. The second preset standard can be TS38.211, and the fifth table can be Table 5.2.2.2.1-8.

[0165] The codebook corresponding to transport layer 5 can be determined according to the ninth table in the second preset standard. The second preset standard can be TS38.211, and the ninth table can be Table 5.2.2.2.1-9. The codebook corresponding to transport layer 6 can be determined according to the tenth table in the second preset standard. The second preset standard can be TS38.211, and the tenth table can be Table 5.2.2.2.1-10.

[0166] The codebook corresponding to transport layer 7 can be determined according to table eleven in the second preset standard, which can be TS38.211, and table five can be Table 5.2.2.2.1-11; the codebook corresponding to transport layer 8 can be determined according to table twelfth in the second preset standard, which can be TS38.211, and table five can be Table 5.2.2.2.1-12. Other relevant parameters θ p , φ n u m ,,v l,m , It can be determined according to the Type-I single-panel codebook calculation rules in the third preset standard (TS38.211).

[0167] The target mapping table includes the mapping relationship between the number of antenna ports and the number of polarization direction ports, as well as the mapping relationship between the number of antenna ports and the oversampled value. That is, for a given number of CSI-RS ports, the supported (N1, N2) configurations and the corresponding (O1, O2) values ​​are given in Table 1 below. The number of CSI-RS ports (PCSI-RS) can be determined based on the number of polarization direction ports. For example, it can be the product of the number of first polarization direction ports (N1), the number of second polarization direction ports (N2), and the first target value. The first target value can be 2, which is 2N1N2.

[0168] Table 1

[0169]

[0170] Example 1: For CSI-RS single-panel codebooks with 64 or 128 antenna ports, codebook precoding processes with transmission layers 1 to 4 can be supported. For transmission precoding processes of layers 1 to 4, the codebookMode=1 precoding matrix selection method can be supported. The parameter selection and precoding matrix selection methods follow the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can determine that the first codebook model is the codebook model in the first sub-table of the preset standard where the number of ports is less than the target number. For example, the first sub-table in the preset standard can be Table 5.2.2.2.1-7 in TS38.214, and the codebook model in the first sub-table where the number of ports is less than the target number can be codebookMode=1-2,P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS <The precoding model corresponding to the sub-table. For a target transport layer number of 4, the terminal can determine that the first codebook model is the codebook model in the second sub-table of the preset standard where the number of ports is less than the target number. For example, the second sub-table in the preset standard can be Table 5.2.2.2.1-8 in TS38.214, and the codebook model in the second sub-table where the number of ports is less than the target number can be codebookMode = 1-2,P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS <The precoding model corresponding to the sub-table. The target mapping is used for 3-stream and 4-stream reporting, and the target mapping can be from i 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4 in the preset standard (TS38.214).

[0171] Example 2: For CSI-RS single-panel codebooks with 64 or 128 antenna ports, codebook precoding processes with transmission layers 1 to 4 can be supported. For transmission precoding processes of layers 1 to 4, codebookMode=1 and codebookMode=2 precoding matrix selection methods can be supported. The parameter selection and precoding matrix selection methods are based on the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, and O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can determine that the first codebook model is the codebook model in the first sub-table of the preset standard where the number of ports is less than the target number. For example, the first sub-table in the preset standard can be Table 5.2.2.2.1-7 in TS38.214, and the codebook model in the first sub-table where the number of ports is less than the target number can be codebookMode=1-2 in Table 5.2.2.2.1-7 of TS38.214. CSI-RS <The precoding model corresponding to the sub-table. For a target transport layer number of 4, the terminal can determine that the first codebook model is the codebook model in the second sub-table of the preset standard where the number of ports is less than the target number. For example, the second sub-table in the preset standard can be Table 5.2.2.2.1-8 in TS38.214, and the codebook model in the second sub-table where the number of ports is less than the target number can be codebookMode = 1-2,P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS <The precoding model corresponding to the sub-table. The target mapping is used for 3-stream and 4-stream reporting, and the target mapping can be from i 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4 in the preset standard (TS38.214).

[0172] Example 3: For CSI-RS single-panel codebooks with 64 or 128 antenna ports, codebook precoding processes with transmission layers 1 to 8 can be supported. For transmission precoding processes of layers 1 to 8, the codebookMode=1 precoding matrix selection method can be supported. The parameter selection and precoding matrix selection methods follow the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can determine that the first codebook model is the codebook model in the first sub-table of the preset standard where the number of ports is less than the target number. For example, the first sub-table in the preset standard can be Table 5.2.2.2.1-7 in TS38.214, and the codebook model in the first sub-table where the number of ports is less than the target number can be codebookMode=1-2,P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS <The precoding model corresponding to the sub-table. For a target transport layer number of 4, the terminal can determine that the first codebook model is the codebook model in the second sub-table of the preset standard where the number of ports is less than the target number. For example, the second sub-table in the preset standard can be Table 5.2.2.2.1-8 in TS38.214, and the codebook model in the second sub-table where the number of ports is less than the target number can be codebookMode = 1-2,P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS <The precoding model corresponding to the sub-table. The target mapping is used for 3-stream and 4-stream reporting, and the target mapping can be from i 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4 in the preset standard (TS38.214).

[0173] Example 4: For CSI-RS single-panel codebooks with 64 or 128 antenna ports, codebook precoding processes with transmission layers 1 to 8 can be supported. For transmission precoding processes of layers 1 to 8, codebookMode=1 and codebookMode=2 precoding matrix selection methods can be supported. The parameter selection and precoding matrix selection methods are based on the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, and O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can determine that the first codebook model is the codebook model in the first sub-table of the preset standard where the number of ports is less than the target number. For example, the first sub-table in the preset standard can be Table 5.2.2.2.1-7 in TS38.214, and the codebook model in the first sub-table where the number of ports is less than the target number can be codebookMode=1-2 in Table 5.2.2.2.1-7 of TS38.214. CSI-RS <The precoding model corresponding to the sub-table. For a target transport layer number of 4, the terminal can determine that the first codebook model is the codebook model in the second sub-table of the preset standard where the number of ports is less than the target number. For example, the second sub-table in the preset standard can be Table 5.2.2.2.1-8 in TS38.214, and the codebook model in the second sub-table where the number of ports is less than the target number can be codebookMode = 1-2,P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS <The precoding model corresponding to the sub-table. The target mapping is used for 3-stream and 4-stream reporting, and the target mapping can be from i 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4 in the preset standard (TS38.214).

[0174] Example 5: For CSI-RS single-panel codebooks with 64 or 128 CSI-RS antenna ports, codebook precoding processes with transmission layers 1 to 4 can be supported. For transmission precoding processes of layers 1 to 4, the codebookMode=1 precoding matrix selection method can be supported. The parameter selection and precoding matrix selection methods follow the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, i.e., follow the codebookMode=1-2,P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS The precoding generation method for ≥16 sub-tables; for a target transport layer number of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, that is, follow the codebookMode = 1-2, P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS A precoding method for generating sub-tables of ≥16.

[0175] Example 6: For CSI-RS single-panel codebooks with 64 or 128 antenna ports, codebook precoding processes with transmission layers 1 to 4 can be supported. For transmission precoding processes of layers 1 to 4, codebookMode=1 and codebookMode=2 precoding matrix selection methods can be supported. The parameter selection and precoding matrix selection methods follow the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, i.e., follow the codebookMode=1-2, P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS The precoding generation method for ≥16 sub-tables; for a target transport layer number of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, that is, follow the codebookMode = 1-2, P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS A precoding method for generating sub-tables of ≥16.

[0176] Example 7: For CSI-RS single-panel codebooks with 64 or 128 antenna ports, codebook precoding processes with transmission layers 1 to 8 can be supported. For transmission precoding processes of layers 1 to 8, the codebookMode=1 precoding matrix selection method can be supported. The parameter selection and precoding matrix selection methods follow the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, i.e., follow the codebookMode=1-2,P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS The precoding generation method for ≥16 sub-tables; for a target transport layer number of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, that is, follow the codebookMode = 1-2, P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS A precoding method for generating sub-tables of ≥16.

[0177] Example 8: For CSI-RS single-panel codebooks with 64 or 128 CSI-RS antenna ports, codebook precoding processes with transmission layers 1 to 8 can be supported. For transmission precoding processes of layers 1 to 8, codebookMode=1 and codebookMode=2 precoding matrix selection methods can be supported. The parameter selection and precoding matrix selection methods are based on the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, that is, follow the codebookMode=1-2, P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS The precoding generation method for ≥16 sub-tables; for a target transport layer number of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, that is, follow the codebookMode = 1-2, P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS A precoding method for generating sub-tables of ≥16.

[0178] If the target codebook type is a Type 1 multi-panel codebook, i.e., the target codebook type is a Type-I multi-panel codebook, then for 8-antenna ports {3000, 3001, ..., 3007}, 16-antenna ports {3000, 3001, ..., 3015}, 32-antenna ports {3000, 3001, ..., 3031}, 64-antenna ports {3000, 3001, ..., 3063}, and 128-antenna ports {3000, 3001, ..., 3127}, and the user terminal can configure the codebook type parameter codebookType as typeI-MultiPanel through the higher-layer parameter codebookType, i.e., the terminal can configure the codebook type parameter codebookType as Type I multi-panel codebook typeI-MultiPanel; the values ​​of Ng, N1, and N2 are configured through the higher-layer parameter ng-n1-n2.

[0179] The target mapping table includes the mapping relationship between the number of antenna ports and the number of polarization direction ports, as well as the mapping relationship between the number of antenna ports and the oversampled value. That is, for a given number of CSI-RS ports, the supported (N1, N2, Ng) configurations and the corresponding (O1, O2) values ​​are given in Table 2 below. The number of CSI-RS ports (PCSI-RS) can be determined based on the number of polarization direction ports. For example, it can be the product of the number of first polarization direction ports (N1), the number of second polarization direction ports (N2), and the first target value. The first target value can be 2, which is 2N1N2Ng.

[0180] Table 2

[0181]

[0182] The specific process of the embodiment is similar to that of the single-panel codebook, and will not be described again here.

[0183] In another embodiment, the implementation process for supporting 48 antenna ports, 64 antenna ports, 96 antenna ports, and 128 antenna ports for both Type 1 single-panel codebooks and Type 1 multi-panel codebooks includes the following:

[0184] If the target codebook type is Type-1 single-panel codebook, i.e., the target codebook type is Type-I single-panel codebook, then for 4-antenna ports {3000, 3001, 3002, 3003}, 8-antenna ports {3000, 3001, ..., 3007}, 12-antenna ports {3000, 3001, ..., 3011}, 16-antenna ports {3000, 3001, ..., 3015}, 24-antenna ports {3000, 3001, ..., 3023}, 32-antenna ports {3000, 3001, ..., 3031}, and 64-antenna ports {3 Given 96 antenna ports {3000, 3001, ..., 3063}, 128 antenna ports {3000, 3001, ..., 3095}, and 128 antenna ports {3000, 3001, ..., 3127}, and the user terminal (UE) can configure the codebook type parameter codebookType as typeI-SinglePanel via the higher-layer parameter codebookType, that is, the terminal can configure the codebook type parameter codebookType as typeI single-panel codebook typeI-SinglePanel, then when the layer number υ∈{2,3,4}, each PMI value corresponds to 4 codebook indices i 1,1 i 1,2 i2 and i 1,3 When the number of layers Each PMI value corresponds to 3 codebook indices i 1,1 i 1,2 i2. υ is the transport layer number or the stream number.

[0185] If the target transport layer is 2, then the 2 streams are uploaded from the user terminal to the base station through target mapping. The target mapping used for 2 stream reporting can be from i 1,3 The mapping to k1 and k2, from i 1,3 The mappings to k1 and k2 can be determined based on Table 5.2.2.2.1-3. In P CSI-RS When (number of antenna ports) < 16, the target mapping used for 3-stream reporting can be from i 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4, and the target mapping for 4-stream reporting can be from i 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4.

[0186] The codebooks for streams 1 to 8 are given in Tables 5.2.2.2.1-5, 5.2.2.2.1-6, 5.2.2.2.1-7, 5.2.2.2.1-8, 5.2.2.2.1-9, 5.2.2.2.1-10, 5.2.2.2.1-11, and 5.2.2.2.1-12 of TS38.211. That is, the codebooks for transport layer 1 (stream 1) to transport layer 8 can be determined according to Tables 5 to 12 of the second preset standard. Specifically, the codebook for transport layer 1 can be determined according to Table 5 of the second preset standard, which can be TS38.211, and Table 5.2.2.2.1-5. The codebook for transport layer 2 can be determined according to Table 6 of the second preset standard, which can be TS38.211, and Table 5.2.2.2.1-6.

[0187] The codebook corresponding to transport layer 3 can be determined according to the seventh table in the second preset standard. The second preset standard can be TS38.211, and the seventh table can be Table 5.2.2.2.1-7. The codebook corresponding to transport layer 4 can be determined according to the eighth table in the second preset standard. The second preset standard can be TS38.211, and the fifth table can be Table 5.2.2.2.1-8.

[0188] The codebook corresponding to transport layer 5 can be determined according to the ninth table in the second preset standard. The second preset standard can be TS38.211, and the ninth table can be Table 5.2.2.2.1-9. The codebook corresponding to transport layer 6 can be determined according to the tenth table in the second preset standard. The second preset standard can be TS38.211, and the tenth table can be Table 5.2.2.2.1-10.

[0189] The codebook corresponding to transport layer 7 can be determined according to table eleven in the second preset standard, which can be TS38.211, and table five can be Table 5.2.2.2.1-11; the codebook corresponding to transport layer 8 can be determined according to table twelfth in the second preset standard, which can be TS38.211, and table five can be Table 5.2.2.2.1-12. Other relevant parameters θ p , φ n u m ,,v l,m , It can be determined according to the Type-I single-panel codebook calculation rules in the third preset standard (TS38.211).

[0190] The target mapping table includes the mapping relationship between the number of antenna ports and the number of polarization direction ports, as well as the mapping relationship between the number of antenna ports and the oversampled value. That is, for a given number of CSI-RS ports, the supported (N1, N2) configurations and the corresponding (O1, O2) values ​​are given in Table 3 below. The number of CSI-RS ports (PCSI-RS) can be determined based on the number of polarization direction ports. For example, it can be the product of the number of first polarization direction ports (N1), the number of second polarization direction ports (N2), and the first target value. The first target value can be 2, which is 2N1N2.

[0191] Table 3

[0192]

[0193] Example 1: For single-panel codebooks with 48, 64, 96, and 128 CSI-RS antenna ports, codebook precoding processes with transmission layers 1 to 4 can be supported. For transmission precoding processes of layers 1 to 4, the codebookMode=1 precoding matrix selection method can be supported. The parameter selection and precoding matrix selection methods follow the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is less than the target number, i.e., follow the codebookMode=1-2,P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS <16 sub-table precoding generation method; for a target transport layer number of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is less than the target number, that is, follow the codebookMode = 1-2, P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS A precoding method for generating <16 sub-tables. The target map is used for 3-stream and 4-stream reporting, and the target map can be derived from i... 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4 in the preset standard (TS38.214).

[0194] Example 2: For single-panel codebooks with 48, 64, 96, and 128 CSI-RS antenna ports, codebook precoding processes with transmission layers 1 to 4 can be supported. For transmission precoding processes of layers 1 to 4, codebookMode=1 and codebookMode=2 precoding matrix selection methods can be supported. The parameter selection and precoding matrix selection methods follow the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, and O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is less than the target number, i.e., follow the codebookMode=1-2, P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS <16 sub-table precoding generation method; for a target transport layer number of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is less than the target number, that is, follow the codebookMode = 1-2, P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS A precoding method for generating <16 sub-tables. The target map is used for 3-stream and 4-stream reporting, and the target map can be derived from i... 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4 in the preset standard (TS38.214).

[0195] Example 3: For single-panel codebooks with 48, 64, 96, and 128 CSI-RS antenna ports, codebook precoding processes with transmission layers 1 to 8 can be supported. For transmission precoding processes with layers 1 to 5, the codebookMode=1 precoding matrix selection method can be supported. The parameter selection and precoding matrix selection methods follow the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is less than the target number, i.e., follow the codebookMode=1-2,P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS <16 sub-table precoding generation method; for a target transport layer number of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is less than the target number, that is, follow the codebookMode = 1-2, P in Table 5.2.2.2.1-8 of TS38.214.CSI-RS A precoding method for generating <16 sub-tables. The target map is used for 3-stream and 4-stream reporting, and the target map can be derived from i... 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4 in the preset standard (TS38.214).

[0196] Example 4: For single-panel codebooks with 48, 64, 96, and 128 CSI-RS antenna ports, codebook precoding processes with 1 to 5 transmission layers can be supported. For transmission precoding processes of layers 1 to 5, codebookMode=1 and codebookMode=2 precoding matrix selection methods can be supported. The parameter selection and precoding matrix selection methods follow the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, and O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is less than the target number, i.e., follow the codebookMode=1-2, P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS <16 sub-table precoding generation method; for a target transport layer number of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is less than the target number, that is, follow the codebookMode = 1-2, P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS A precoding method for generating <16 sub-tables. The target map is used for 3-stream and 4-stream reporting, and the target map can be derived from i... 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4 in the preset standard (TS38.214).

[0197] Example 5: For single-panel codebooks with 48, 64, 96, and 128 CSI-RS antenna ports, codebook precoding processes with transmission layers 1 to 4 can be supported. For transmission precoding processes of layers 1 to 4, the codebookMode=1 precoding matrix selection method can be supported. The parameter selection and precoding matrix selection methods follow the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, i.e., follow the codebookMode=1-2,P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS The precoding generation method for ≥16 sub-tables; for a target transport layer number of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, that is, follow the codebookMode = 1-2, P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS A precoding method for generating ≥16 sub-tables. The target map is used for 3-stream and 4-stream reporting, and the target map can be derived from i. 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4 in the preset standard (TS38.214).

[0198] Example 6: For single-panel codebooks with 48, 64, 96, and 128 CSI-RS antenna ports, codebook precoding processes with transmission layers 1 to 4 can be supported. For transmission precoding processes of layers 1 to 4, codebookMode=1 and codebookMode=2 precoding matrix selection methods can be supported. The parameter selection and precoding matrix selection methods follow the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, and O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, i.e., follow the codebookMode=1-2, P in Table 5.2.2.2.1-7 of TS38.214. CSI-RSThe precoding generation method for ≥16 sub-tables; for a target transport layer number of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, that is, follow the codebookMode = 1-2, P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS A precoding method for generating ≥16 sub-tables. The target map is used for 3-stream and 4-stream reporting, and the target map can be derived from i. 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4 in the preset standard (TS38.214).

[0199] Example 7: For single-panel codebooks with 48, 64, 96, and 128 CSI-RS antenna ports, codebook precoding processes with transmission layers 1 to 8 can be supported. For transmission precoding processes of layers 1 to 8, the codebookMode=1 precoding matrix selection method can be supported. The parameter selection and precoding matrix selection methods follow the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, i.e., follow the codebookMode=1-2,P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS The precoding generation method for ≥16 sub-tables; for a target transport layer number of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, that is, follow the codebookMode = 1-2, P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS A precoding method for generating ≥16 sub-tables. The target map is used for 3-stream and 4-stream reporting, and the target map can be derived from i. 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4 in the preset standard (TS38.214).

[0200] Example 8: For single-panel codebooks with 48, 64, 96, and 128 CSI-RS antenna ports, codebook precoding processes with transmission layers 1 to 8 can be supported. For transmission precoding processes of layers 1 to 8, codebookMode=1 and codebookMode=2 precoding matrix selection methods can be supported. The parameter selection and precoding matrix selection methods follow the selection methods in the corresponding modes of the legacy Type-I single-panel codebook. The new parameter N1, N2, O1, and O2 values ​​under 64 or 128 ports are substituted for calculation. The values ​​of the above parameters are determined based on the number of antenna ports in the target mapping table. For a target transmission layer of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, i.e., follow the codebookMode=1-2, P in Table 5.2.2.2.1-7 of TS38.214. CSI-RS The precoding generation method for ≥16 sub-tables; for a target transport layer number of 3, the terminal can follow the codebook model in the first table of the preset standard where the number of ports is greater than or equal to the target number, that is, follow the codebookMode = 1-2, P in Table 5.2.2.2.1-8 of TS38.214. CSI-RS A precoding method for generating ≥16 sub-tables. The target map is used for 3-stream and 4-stream reporting, and the target map can be derived from i. 1,3 The mapping to k1 and k2, from i 1,3 The mapping to k1 and k2 can be determined based on Table 5.2.2.2.1-4 in the preset standard (TS38.214).

[0201] If the target codebook type is a Type-1 multi-panel codebook, that is, the target codebook type is a Type-I multi-panel codebook, then for 8-antenna ports {3000, 3001, ..., 3007}, 16-antenna ports {3000, 3001, ..., 3015}, 32-antenna ports {3000, 3001, ..., 3031}, 64-antenna ports {3000, 3001, ..., 3063}, 96-antenna ports {3000, 3001, ..., 3095}, and 128-antenna ports {3000, 3001, ..., 3127}, and the user terminal can configure the codebook type parameter codebookType as typeI-MultiPanel through the higher-layer parameter codebookType, that is, the terminal can configure the codebook type parameter codebookType as TypeI multi-panel codebook typeI-MultiPanel; the values ​​of Ng, N1, and N2 are configured through the higher-layer parameter ng-n1-n2;

[0202] The target mapping table includes the mapping relationship between the number of antenna ports and the number of polarization direction ports, as well as the mapping relationship between the number of antenna ports and the oversampled value. That is, for a given number of CSI-RS ports, the supported (N1, N2, Ng) configurations and the corresponding (O1, O2) values ​​are given in Table 4 below. The number of CSI-RS ports (PCSI-RS) can be determined based on the number of polarization direction ports. For example, it can be the product of the number of first polarization direction ports (N1), the number of second polarization direction ports (N2), and the first target value. The first target value can be 2, which is 2N1N2Ng.

[0203] Table 4

[0204]

[0205] The precoding method provided in this embodiment supports up to 128 CSI-RS ports as required by the 3GPP R19 MIMO enhancements. It is applicable to codebooks with large Type-I CSI-RS ports (>32) in both single-panel and multi-panel configurations. First, the array configuration for multiple ports is defined. Based on the existing small-port codebook, a multi-port codebook is constructed, and the two-level precoding matrix selection strategy is enhanced to support multiple ports and multiple streams. This patented method achieves a Type-I codebook and precoding scheme for up to 128 ports, balancing codebook complexity and precoding performance, avoiding the high complexity issues that may arise from multi-port measurements, and demonstrating high practicality and feasibility. Because it is based on a Type-I codebook, the CSI feedback signaling overhead is low, and it also has backward protocol compatibility.

[0206] It should be understood that, although Figure 1-2 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 1-2 At least some of the steps in the process may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but may be executed at different times. The execution order of these steps or stages is not necessarily sequential, but may be executed in turn or alternately with other steps or at least some of the steps or stages in other steps.

[0207] In one embodiment, such as Figure 3 As shown, a precoding device is provided for use in a terminal, comprising: a first determining module 302 and a precoding module 304, wherein:

[0208] The first determining module 302 is used to determine the number of polarization direction ports and the oversampling value corresponding to the number of antenna ports based on the number of antenna ports and the target mapping table. The number of target transmission layers belongs to the first target transmission layer set, and the target mapping table is the mapping table corresponding to the target codebook type.

[0209] The precoding module 304 is used to perform precoding based on the target precoding model corresponding to the number of polarization direction ports, oversampling values, and target transmission layers to obtain the precoding result.

[0210] In one embodiment, the first target transmission layer set includes 1 to 4 layers.

[0211] In one embodiment, the target precoding model corresponding to the target transmission layer number is the first codebook model.

[0212] In one embodiment, the target precoding model corresponding to the target transmission layer number is either a first codebook model or a second codebook model.

[0213] In one embodiment, when the target transport layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number. When the target transport layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0214] In one embodiment, when the target transport layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard whose number of ports is greater than or equal to the target number. When the target transport layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard whose number of ports is greater than or equal to the target number.

[0215] In one embodiment, the first target transmission layer set includes 1 to 8 layers.

[0216] In one embodiment, the target precoding model corresponding to the target transmission layer number is the first codebook model.

[0217] In one embodiment, the target precoding model corresponding to the target transmission layer number is either a first codebook model or a second codebook model.

[0218] In one embodiment, when the target transport layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number. When the target transport layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0219] In one embodiment, when the target transport layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number. When the target transport layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0220] In one embodiment, the target codebook type of the terminal is a Type I single-panel codebook type, and the target mapping table is a mapping table corresponding to the Type I single-panel codebook. The mapping table includes the mapping relationship between the number of antenna ports and the number of polarization direction ports, and the mapping relationship between the number of antenna ports and the oversampled value. The number of polarization direction ports includes a first polarization direction port number and a second polarization direction port number, and the oversampled value includes a first oversampled value and a second oversampled value.

[0221] In one embodiment, the target codebook type of the terminal is a type I multi-panel codebook type, and the target mapping table is a mapping table corresponding to the type I multi-panel codebook. The mapping table includes the mapping relationship between the number of antenna ports and the number of polarization direction ports, and the mapping relationship between the number of antenna ports and the oversampled value. The number of polarization direction ports includes the number of first polarization direction ports, the number of second polarization direction ports, and the number of third polarization direction ports. The oversampled value includes the first oversampled value and the second oversampled value.

[0222] In one embodiment, the number of antenna ports includes any one of 48, 64, 96, and 128.

[0223] In one embodiment, the target codebook type of the terminal is a Type I single-panel codebook type, and the codebook type parameter of the terminal is configured as a Type I single-panel codebook.

[0224] In one embodiment, the target codebook type of the terminal is a type I multi-panel codebook type, and the codebook type parameter of the terminal is configured as a type I multi-panel codebook.

[0225] In one embodiment, the device further includes:

[0226] The second determining module is configured to determine the PMI value based on the first codebook index, the second codebook index, the third codebook index, and the fourth codebook index if the target transmission layer number belongs to the second target layer number set. If the target transmission layer number does not belong to the second target layer number set, the PMI value is determined based on the first codebook index, the second codebook index, and the third codebook index.

[0227] In one embodiment, the second target set of layers includes 2 layers, 3 layers, and 4 layers.

[0228] In one embodiment, the device further includes:

[0229] The second determining module is further configured to upload the data stream corresponding to the second layer through a target mapping if the target transmission layer number is 2 layers. The target mapping represents the mapping between the third codebook index and the first parameter and the second parameter. The target mapping is determined based on the first preset table data.

[0230] In one embodiment, the device further includes:

[0231] The second determining module is further configured to upload the data stream corresponding to the 3rd or 4th layer through a target mapping if the target transmission layer is 3 or 4 layers. The target mapping represents the mapping from the third codebook index to the first parameter and the second parameter. The target mapping is determined based on the second preset table data.

[0232] Specific limitations regarding the precoding apparatus can be found in the limitations of the precoding method described above, and will not be repeated here. Each module in the aforementioned precoding apparatus can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware or independently of the processor in the computer device, or stored in software in the memory of the computer device, so that the processor can call and execute the operations corresponding to each module.

[0233] In one embodiment, a communication device is provided, see [link to previous document]. Figure 4 . Figure 4 This is a schematic diagram of the structure of the terminal device provided in an embodiment of the present invention. Figure 4 The terminal device 400 shown includes at least one processor 401, a memory 402, at least one network interface 404, and a user interface 403. The various components in the terminal device 400 are coupled together via a bus system 405. It is understood that the bus system 405 is used to implement communication between these components. In addition to a data bus, the bus system 405 also includes a power bus, a control bus, and a status signal bus. However, for clarity, ... Figure 4 Various buses are labeled as bus system 405. Additionally, this embodiment of the invention includes a transceiver 406, which may consist of multiple elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium.

[0234] The user interface 403 may include a display, keyboard, or clicking device (e.g., mouse, trackball, touchpad, or touchscreen).

[0235] It is understood that the memory 402 in this embodiment of the invention can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 402 of the systems and methods described in the embodiments of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.

[0236] In some implementations, memory 402 stores elements such as executable modules or data structures, or subsets thereof, or extended sets thereof: operating system 4021 and application program 4022.

[0237] The operating system 4021 includes various system programs, such as the framework layer, core library layer, and driver layer, used to implement various basic business functions and handle hardware-based tasks. The application program 4022 includes various applications, such as a media player and a browser, used to implement various application functions. The program implementing the method of this embodiment can be included in the application program 4022.

[0238] In this embodiment of the invention, by calling the program or instructions stored in memory 402, specifically the program or instructions stored in application program 4022, the processor is used to determine the number of polarization direction ports and the oversampling value corresponding to the number of antenna ports based on the number of antenna ports and the target mapping table, wherein the target mapping table is a mapping table corresponding to the target codebook type; the processor is also used to perform precoding based on the number of polarization direction ports, the oversampling value and the target precoding model corresponding to the target transmission layer number to obtain a precoding result, wherein the target transmission layer number belongs to the first target transmission layer number set.

[0239] The methods disclosed in the above embodiments of the present invention, in part or in all of them, can also be applied to processor 401, implemented by processor 401, or implemented by processor 401 in conjunction with other components (e.g., transceivers). Processor 401 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above methods can be completed by the integrated logic circuit of the hardware in processor 401 or by instructions in the form of software. The processor 401 may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present invention can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can reside in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory 402. The processor 401 reads the information in memory 402 and, in conjunction with its hardware, completes the steps of the above method.

[0240] It is understood that the embodiments described in this invention can be implemented using hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in this application, or combinations thereof.

[0241] For software implementation, the techniques described in the embodiments of the present invention can be implemented by modules (e.g., procedures, functions, etc.) that perform the functions described in the embodiments of the present invention. The software code can be stored in memory and executed by processor 401. The memory can be implemented in processor 401 or external to processor 401.

[0242] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0243] Based on the number of antenna ports and the target mapping table, the number of polarization direction ports and the oversampling value corresponding to the number of antenna ports are determined. The number of target transmission layers belongs to the first set of target transmission layers, and the target mapping table is the mapping table corresponding to the target codebook type.

[0244] Precoding is performed based on the target precoding model corresponding to the number of polarization direction ports, oversampling values, and target transmission layer number to obtain the precoding result.

[0245] In one embodiment, when the computer program is executed by a processor, it further performs the following steps, wherein the first target transport layer set includes 1 to 4 layers.

[0246] In one embodiment, when the computer program is executed by the processor, it further implements the following steps, wherein the target precoding model corresponding to the target transport layer number is a first codebook model.

[0247] In one embodiment, when the computer program is executed by the processor, it further implements the following steps, wherein the target precoding model corresponding to the target transport layer number is either a first codebook model or a second codebook model.

[0248] In one embodiment, when the computer program is executed by a processor, it further implements the following steps: when the target transport layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number; when the target transport layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0249] In one embodiment, when the computer program is executed by a processor, it further implements the following steps: when the target transport layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard whose number of ports is greater than or equal to the target number. When the target transport layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard whose number of ports is greater than or equal to the target number.

[0250] In one embodiment, when the computer program is executed by a processor, it further performs the following steps, wherein the first target transport layer set includes 1 to 8 layers.

[0251] In one embodiment, when the computer program is executed by the processor, it further implements the following steps, wherein the target precoding model corresponding to the target transport layer number is a first codebook model.

[0252] In one embodiment, when the computer program is executed by the processor, it further implements the following steps, wherein the target precoding model corresponding to the target transport layer number is either a first codebook model or a second codebook model.

[0253] In one embodiment, when the computer program is executed by a processor, it further implements the following steps: when the target transport layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number; when the target transport layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0254] In one embodiment, when the computer program is executed by a processor, it further implements the following steps: when the target transport layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number; when the target transport layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

[0255] In one embodiment, when the computer program is executed by the processor, it further implements the following steps: the target codebook type of the terminal is a Type I single-panel codebook type, the target mapping table is a mapping table corresponding to the Type I single-panel codebook, the mapping table includes a mapping relationship between the number of antenna ports and the number of polarization direction ports, and a mapping relationship between the number of antenna ports and the oversampled value, the number of polarization direction ports includes a first polarization direction port number and a second polarization direction port number, and the oversampled value includes a first oversampled value and a second oversampled value.

[0256] In one embodiment, when the computer program is executed by the processor, it further implements the following steps: the target codebook type of the terminal is a type I multi-panel codebook type; the target mapping table is a mapping table corresponding to the type I multi-panel codebook; the mapping table includes a mapping relationship between the number of antenna ports and the number of polarization direction ports, and a mapping relationship between the number of antenna ports and the oversampled value; the number of polarization direction ports includes a first polarization direction port number, a second polarization direction port number, and a third polarization direction port number; and the oversampled value includes a first oversampled value and a second oversampled value.

[0257] In one embodiment, when the computer program is executed by a processor, it further implements the following steps, wherein the number of antenna ports includes any one of 48, 64, 96, and 128.

[0258] In one embodiment, when the computer program is executed by the processor, it further implements the following steps: the target codebook type of the terminal is a type I single-panel codebook type, and the codebook type parameter of the terminal is configured as a type I single-panel codebook.

[0259] In one embodiment, when the computer program is executed by the processor, it further implements the following steps: the target codebook type of the terminal is a type I multi-panel codebook type, and the codebook type parameter of the terminal is configured as a type I multi-panel codebook.

[0260] In one embodiment, when the computer program is executed by a processor, it further performs the following steps, the method further comprising:

[0261] If the target transmission layer number belongs to the second target layer number set, the PMI value is determined based on the first codebook index, the second codebook index, the third codebook index, and the fourth codebook index. If the target transmission layer number does not belong to the second target layer number set, the PMI value is determined based on the first codebook index, the second codebook index, and the third codebook index.

[0262] In one embodiment, when the computer program is executed by the processor, it further performs the following steps, wherein the second target set of layers includes 2 layers, 3 layers, and 4 layers.

[0263] In one embodiment, when the computer program is executed by a processor, it further implements the following steps, the method further comprising: if the target transmission layer number is 2 layers, uploading the data stream corresponding to the 2 layers through a target mapping, wherein the target mapping represents a mapping from the third codebook index to the first parameter and the second parameter, and the target mapping is determined based on a first preset table data.

[0264] In one embodiment, when the computer program is executed by the processor, it further implements the following steps, the method further comprising: if the target transmission layer is 3 or 4 layers, uploading the data stream corresponding to the 3 or 4 layers through a target mapping, wherein the target mapping represents a mapping from the third codebook index to the first parameter and the second parameter, and the target mapping is determined based on second preset table data.

[0265] This application also provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the following steps:

[0266] Based on the number of antenna ports and the target mapping table, the number of polarization direction ports and the oversampling value corresponding to the number of antenna ports are determined. The number of target transmission layers belongs to the first set of target transmission layers, and the target mapping table is the mapping table corresponding to the target codebook type.

[0267] Precoding is performed based on the target precoding model corresponding to the number of polarization direction ports, oversampling values, and target transmission layer number to obtain the precoding result.

[0268] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0269] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0270] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A precoding method, characterized in that, Applied to a terminal, the method includes: Based on the number of antenna ports and the target mapping table, the number of polarization direction ports and the oversampling value corresponding to the number of antenna ports are determined. The target mapping table is the mapping table corresponding to the target codebook type. Precoding is performed based on the target precoding model corresponding to the number of polarization direction ports, oversampling values, and target transmission layers to obtain the precoding result, wherein the target transmission layer belongs to the first target transmission layer set.

2. The method according to claim 1, characterized in that, The first target transmission layer set includes layers 1 to 4.

3. The method according to claim 2, characterized in that, The target precoding model corresponding to the target transmission layer number is the first codebook model.

4. The method according to claim 2, characterized in that, The target precoding model corresponding to the target transmission layer number is either the first codebook model or the second codebook model.

5. The method according to claim 3 or 4, characterized in that, When the target transmission layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number; when the target transmission layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

6. The method according to claim 3 or 4, characterized in that, When the target transmission layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is greater than or equal to the target number; when the target transmission layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is greater than or equal to the target number.

7. The method according to claim 1, characterized in that, The first target transmission layer set includes layers 1 to 8.

8. The method according to claim 7, characterized in that, The target precoding model corresponding to the target transmission layer number is the first codebook model.

9. The method according to claim 8, characterized in that, The target precoding model corresponding to the target transmission layer number is either the first codebook model or the second codebook model.

10. The method according to claim 8 or 9, characterized in that, When the target transmission layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number; when the target transmission layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

11. The method according to claim 8 or 9, characterized in that, When the target transmission layer number is 3, the first codebook model is the codebook model corresponding to the first sub-table in the preset standard where the number of ports is less than the target number; when the target transmission layer number is 4, the first codebook model is the codebook model corresponding to the second sub-table in the preset standard where the number of ports is less than the target number.

12. The method according to claim 1, characterized in that, The target codebook type of the terminal is a Type I single-panel codebook type, and the target mapping table is the mapping table corresponding to the Type I single-panel codebook. The mapping table includes the mapping relationship between the number of antenna ports and the number of polarization direction ports, as well as the mapping relationship between the number of antenna ports and the oversampled value. The number of polarization direction ports includes the number of first polarization direction ports and the number of second polarization direction ports, and the oversampled value includes the first oversampled value and the second oversampled value.

13. The method according to claim 1, characterized in that, The target codebook type of the terminal is a type I multi-panel codebook type, and the target mapping table is a mapping table corresponding to the type I multi-panel codebook. The mapping table includes the mapping relationship between the number of antenna ports and the number of polarization direction ports, and the mapping relationship between the number of antenna ports and the oversampled value. The number of polarization direction ports includes the number of first polarization direction ports, the number of second polarization direction ports, and the number of third polarization direction ports. The oversampled value includes the first oversampled value and the second oversampled value.

14. The method according to any one of claims 1 to 13, characterized in that, The number of antenna ports includes any one of 48, 64, 96, and 128.

15. The method according to claim 12, characterized in that, The target codebook type of the terminal is Type I single-panel codebook type, and the codebook type parameter of the terminal is configured as Type I single-panel codebook.

16. The method according to claim 13, characterized in that, The target codebook type of the terminal is a type I multi-panel codebook type, and the codebook type parameter of the terminal is configured as type I multi-panel codebook.

17. The method according to claim 1, characterized in that, The method further includes: If the target transmission layer number belongs to the second target layer number set, the PMI value is determined based on the first codebook index, the second codebook index, the third codebook index, and the fourth codebook index; if the target transmission layer number does not belong to the second target layer number set, the PMI value is determined based on the first codebook index, the second codebook index, and the third codebook index.

18. The method according to claim 17, characterized in that, The second target set of layers includes 2 layers, 3 layers, and 4 layers.

19. The method according to claim 17, characterized in that, The method further includes: If the target transmission layer is 2 layers, the data stream corresponding to the 2 layers is uploaded through the target mapping. The target mapping represents the mapping from the third codebook index to the first parameter and the second parameter. The target mapping is determined based on the first preset table data.

20. The method according to claim 17, characterized in that, The method further includes: If the target transmission layer is 3 or 4, the data stream corresponding to the 3rd or 4th layer is uploaded through the target mapping. The target mapping represents the mapping from the third codebook index to the first parameter and the second parameter. The target mapping is determined based on the second preset table data.

21. A precoding device, characterized in that, Applied to a terminal, the device includes: The first determining module is used to determine the number of polarization direction ports and the oversampling value corresponding to the number of antenna ports based on the number of antenna ports and the target mapping table, wherein the target mapping table is a mapping table corresponding to the target codebook type. The precoding module is used to perform precoding based on the target precoding model corresponding to the number of polarization direction ports, the oversampled value, and the target transmission layer number to obtain the precoding result, wherein the target transmission layer number belongs to the first target transmission layer number set.

22. A communication device, characterized in that, include: processor; The processor is used to determine the number of polarization direction ports and the oversampling value corresponding to the number of antenna ports based on the number of antenna ports and the target mapping table, wherein the target mapping table is a mapping table corresponding to the target codebook type; The processor is also used to perform precoding based on the target precoding model corresponding to the number of polarization direction ports, the oversampling value, and the target transmission layer number, to obtain a precoding result, wherein the target transmission layer number belongs to the first target transmission layer number set.

23. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 20.

24. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 20.

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