Low peak-to-average power ratio demodulation reference signal sequence and mode

Abstract

Various aspects of this disclosure relate generally to wireless communication. In some aspects, a user equipment (UE) may use a low peak-to-average power ratio (PAPR) sequence generator to determine one or more demodulation reference signal (DMRS) scrambling sequences, each of the one or more DMRS scrambling sequences corresponding to a corresponding port among one or more ports associated with downlink multiple-input multiple-output (MIMO) communication, wherein the downlink MIMO communication is based on Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM). The UE may receive the downlink MIMO communication including DMRS according to an in-slot DMRS mode indicating one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences. Numerous other aspects are described.

Description

[0001] Cross-references to related applications

[0002] This patent application claims priority to U.S. Nonprovisional Patent Application No. 17 / 812,630, filed July 14, 2022, entitled “A Low Peak-to-Average Power Ratio Demodulation Reference Signal Sequence and Pattern,” which is assigned to the assignee of this application. The disclosure of the earlier application is considered part of this patent application and is incorporated herein by reference. Technical Field

[0003] All aspects of this disclosure relate to wireless communication in general, and to techniques and apparatus for low peak-to-average power ratio (PAPR) demodulation reference signal (DMRS) sequences and modes. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is a collection of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard issued by the 3rd Generation Partnership Project (3GPP).

[0005] A wireless network may include one or more network nodes that support communication for wireless communication devices, such as user equipment (UE) or multiple UEs. UEs may communicate with network nodes via downlink and uplink communication. A "downlink" (or "DL") refers to the communication link from the network node to the UE, and an "uplink" (or "UL") refers to the communication link from the UE to the network node. Some wireless networks may support device-to-device communication, such as via local links (e.g., sidelinks (SL), wireless local area network (WLAN) links, and / or wireless personal area network (WPAN) links, etc.).

[0006] The aforementioned multiple access technologies have been adopted in various telecommunications standards to provide a common protocol enabling different UEs to communicate at the city, country, region, and / or global levels. New Radio (NR), often referred to as 5G, is a collection of enhancements to the LTE mobile standard issued by 3GPP. NR is designed to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) on the downlink (CP-OFDM), and using CP-OFDM and / or Single Carrier Frequency Division Multiplexing (SC-FDM) (also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technologies and carrier aggregation, thereby better supporting mobile broadband internet access. Further improvements to LTE, NR, and other radio access technologies remain useful as the demand for mobile broadband access continues to increase. Attached Figure Description

[0007] To gain a full understanding of the foregoing features of this disclosure, a more specific description of the invention, briefly summarized above, can be obtained by referring to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and are therefore not intended to limit its scope, as other equally valid aspects may be acknowledged in the specification. The same reference numerals in different drawings may identify the same or similar elements.

[0008] Figure 1 This is a diagram illustrating an example of a wireless network according to the present disclosure.

[0009] Figure 2 This is a diagram illustrating an example of communication between a network node and a user equipment (UE) in a wireless network according to the present disclosure.

[0010] Figure 3 This is a diagram illustrating an example decomposed base station architecture according to this disclosure.

[0011] Figure 4A and Figure 4B This is a diagram illustrating an example of a low peak-to-average power ratio (PAPR) demodulation reference signal (DMRS) sequence and pattern associated with this disclosure.

[0012] Figure 5 This is a diagram illustrating an example procedure performed by a UE according to this disclosure, for example.

[0013] Figure 6 This is a diagram illustrating an example process performed, for example, by a network node according to this disclosure.

[0014] Figure 7This is a diagram of an example device for wireless communication according to the present disclosure.

[0015] Figure 8 This is a diagram of an example device for wireless communication according to the present disclosure. Summary of the Invention

[0016] Some aspects described herein relate to a method for wireless communication performed by a user equipment (UE). The method may include: determining one or more demodulation reference signal (DMRS) scrambling sequences using a low peak-to-average power ratio (PAPR) sequence generator, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink multiple-input multiple-output (MIMO) communication, wherein the downlink MIMO communication is based on Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM). The method may include: receiving the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one DMRS scrambling sequence from the one or more DMRS scrambling sequences.

[0017] Some aspects described herein relate to a method for wireless communication performed by a network node. The method may include: determining one or more DMRS scrambling sequences using a low PAPR sequence generator, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM. The method may also include: transmitting the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially allocated with at least one DMRS scrambling sequence from the one or more DMRS scrambling sequences.

[0018] Some aspects described herein relate to a UE for wireless communication. The UE may include a memory; and one or more processors coupled to the memory. The one or more processors may be configured to determine one or more DMRS scrambling sequences using a low PAPR sequence generator, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM. The one or more processors may be configured to receive the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences.

[0019] Some aspects described herein relate to a network node for wireless communication. The network node may include a memory; and one or more processors coupled to the memory. The one or more processors may be configured to determine one or more DMRS scrambling sequences using a low PAPR sequence generator, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM. The one or more processors may be configured to transmit the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences.

[0020] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a UE. When executed by one or more processors of the UE, the set of instructions enables the UE to determine one or more DMRS scrambling sequences using a low PAPR sequence generator, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM. When executed by one or more processors of the UE, the set of instructions enables the UE to receive the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences.

[0021] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a network node. When executed by one or more processors of the network node, the set of instructions enables the network node to determine one or more DMRS scrambling sequences using a low PAPR sequence generator, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM. When executed by one or more processors of the network node, the set of instructions enables the network node to transmit the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences.

[0022] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include: means for determining one or more DMRS scrambling sequences using a low PAPR sequence generator, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM. The apparatus may also include: means for receiving the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially allocated with at least one DMRS scrambling sequence from the one or more DMRS scrambling sequences.

[0023] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include: means for determining one or more DMRS scrambling sequences using a low PAPR sequence generator, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM. The apparatus may also include: means for transmitting the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially allocated with at least one DMRS scrambling sequence from the one or more DMRS scrambling sequences.

[0024] The categories generally include, as fully described herein with reference to the accompanying drawings and description, and illustrated in the accompanying drawings and description, methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, network entities, network nodes, wireless communication devices and / or processing systems.

[0025] The features and technical advantages of the examples according to this disclosure have been summarized quite extensively above in order to better understand the specific embodiments described below. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as the basis for modifying or designing other structures for achieving the same purpose of this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, in both their organization and manner of operation, and the associated advantages, will be better understood by considering the following description in conjunction with the accompanying drawings. Each figure in the drawings is provided for illustrative and descriptive purposes and not as a limitation of the definitions in the claims.

[0026] While aspects are described herein by way of example, those skilled in the art will understand that such aspects can be implemented in many different arrangements and scenarios. The techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or package arrangements. For example, some aspects can be implemented via integrated chip implementations or other devices based on non-modular components (e.g., end-user equipment, vehicles, communication equipment, computing devices, industrial equipment, retail / shopping devices, medical devices, and / or artificial intelligence devices). Aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices incorporating the described aspects and features may include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or summers). The aspects described herein are intended to be practiced in a wide variety of devices, components, systems, distributed arrangements, and / or end-user equipment of various sizes, shapes, and configurations. Detailed Implementation

[0027] Various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as limited to any particular structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of protection of this disclosure to those skilled in the art. Those skilled in the art will appreciate that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently or in combination with any other aspect of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or practice. Furthermore, the scope of this disclosure is intended to cover such apparatuses or methods implemented using structures, functionalities, or structures and functionalities other than or different from the aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure herein may be embodied by one or more elements of the invention.

[0028] Various devices and techniques will now be used to illustrate several aspects of a telecommunications system. These devices and techniques will be described in the following detailed embodiments and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively, “elements”). These elements can be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the system as a whole.

[0029] Although terms generally associated with 5G or New Radio (NR) Radio Access Technology (RAT) may be used herein to describe aspects, aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT and / or 5G and later (e.g., 6G) RATs.

[0030] Figure 1 This is a diagram illustrating an example of a wireless network 100 according to the present disclosure. The wireless network 100 may be a 5G (e.g., NR) network and / or a 4G (e.g., LTE) network, or may include elements of a 5G (e.g., NR) network and / or elements of a 4G (e.g., LTE) network, etc. The wireless network 100 may include one or more network nodes 110 (shown as network node 110a, network node 110b, network node 110c, and network node 110d), user equipment (UE) 120 or multiple UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), and / or other entities. Network node 110 is a network node that communicates with UE 120. As shown, network node 110 may include one or more network nodes. For example, network node 110 can be an aggregated network node, meaning that the aggregated network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single radio access network (RAN) node (e.g., within a single device or unit). As another example, network node 110 can be a decomposed network node (sometimes referred to as a decomposed base station), meaning that network node 110 is configured to utilize a protocol stack that is physically or logically distributed among two or more nodes (such as one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs)).

[0031] In some examples, network node 110 is or includes network nodes (such as RUs) that communicate with UE 120 via a radio access link. In some examples, network node 110 is or includes network nodes (such as DUs) that communicate with other network nodes 110 via a fronthaul or midhaul link. In some examples, network node 110 is or includes network nodes (such as CUs) that communicate with other network nodes 110 via a midhaul link or with the core network via a backhaul link. In some examples, network node 110 (such as aggregated network node 110 or decomposed network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, and / or one or more DUs. For example, network node 110 may include NR base stations, LTE base stations, Node Bs, eNBs (e.g., in 4G), gNBs (e.g., in 5G), access points, Transmit / Receive Points (TRPs), DUs, RUs, CUs, network mobility elements, core network nodes, network elements, network equipment, RAN nodes, or combinations thereof. In some examples, network nodes 110 can interconnect with each other or to one or more other network nodes 110 in the wireless network 100 using any suitable transport network through various types of fronthaul interfaces, midhaul interfaces, and / or backhaul interfaces (such as direct physical connections, air interfaces, or virtual networks).

[0032] In some examples, network node 110 may provide communication coverage for a specific geographic area. In the 3rd Generation Partnership Project (3GPP), depending on the context in which the term is used, the term "cell" may refer to the coverage area of ​​network node 110 and / or the network node subsystem serving that coverage area. Network node 110 may provide communication coverage for macrocells, picocells, femtocells, and / or another type of cell. A macrocell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UE 120 with a service subscription. A picocell may cover a relatively small geographic area and may allow unrestricted access by UE 120 with a service subscription. A femtocell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UE 120 associated with the femtocell (e.g., UE 120 in a Closed Subscriber Group (CSG)). Network node 110 used for macrocells may be referred to as a macro network node. Network node 110 used for picocells may be referred to as a pico network node. The network node 110 used for femtocells can be referred to as a femtocell network node or a home network node. Figure 1In the example shown, network node 110a can be a macro network node for macro cell 102a, network node 110b can be a pico network node for pico cell 102b, and network node 110c can be a femto network node for femto cell 102c. Network nodes can support one or more (e.g., three) cells. In some examples, the cells may not necessarily be stationary, and the geographical area of ​​the cells may move depending on the location of the mobile network node 110 (e.g., a mobile network node).

[0033] In some aspects, the term "base station" or "network node" can refer to an aggregated base station, a decomposed base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some aspects, "base station" or "network node" can refer to a CU, DU, RU, a near real-time (near RT) RAN intelligent controller (RIC), or a non-real-time (non-RT) RIC, or a combination thereof. In some aspects, the term "base station" or "network node" can refer to a device configured to perform one or more functions (such as those described herein in conjunction with network node 110). In some aspects, the term "base station" or "network node" can refer to multiple devices configured to perform one or more functions. For example, in some distributed systems, each of a number of different devices (which may be located in the same geographical location or different geographical locations) may be configured to perform at least a portion of a function, or to repeat the performance of at least a portion of that function, and the term "base station" or "network node" can refer to any one or more of these different devices. In some aspects, the term "base station" or "network node" can refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions can be instantiated on a single device. In some aspects, the term "base station" or "network node" can refer to one base station function rather than another. In this way, a single device can include more than one base station.

[0034] Wireless network 100 may include one or more relay stations. A relay station is a network node that can receive data transmissions from upstream nodes (e.g., network node 110 or UE 120) and transmit data to downstream nodes (e.g., UE 120 or network node 110). A relay station may be a UE 120 that can relay transmissions to other UE 120s. Figure 1 In the example shown, network node 110d (e.g., a relay network node) can communicate with network node 110a (e.g., a macro network node) and UE 120d to facilitate communication between network node 110a and UE 120d. The network node 110 for relay communication may be referred to as a relay station, relay base station, relay network node, relay node, relay, etc.

[0035] The wireless network 100 can be a heterogeneous network, comprising different types of network nodes 110, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, etc. These different types of network nodes 110 may have different transmit power levels, different coverage areas, and / or different effects on interference in the wireless network 100. For example, macro network nodes may have high transmit power levels (e.g., 5 watts to 40 watts), while pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (e.g., 0.1 watts to 2 watts).

[0036] Network controller 130 may be coupled to or communicate with a set of network nodes 110, and may provide coordination and control for these network nodes 110. Network controller 130 may communicate with network nodes 110 via a backhaul or midhaul link. Network nodes 110 may also communicate directly with each other, or indirectly via a wireless or wired backhaul link. In some aspects, network controller 130 may be a CU or a core network device, or may include a CU or a core network device.

[0037] UE 120 may be distributed throughout the wireless network 100, and each UE 120 may be stationary or mobile. UE 120 may include, for example, access terminals, terminals, mobile stations, and / or subscriber units. UE 120 may be a cellular phone (e.g., a smartphone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smartwatch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a GPS device, a UE function of a network node, and / or any other suitable device configured to communicate via wireless or wired media.

[0038] Some UEs 120 may be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type Communication (eMTC) UEs. MTC UEs and / or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags that can communicate with network nodes, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered Internet of Things (IoT) devices and / or may be implemented as NB-IoT (Narrowband IoT) devices. Some UEs 120 may be considered customer premises equipment. UE 120 may be included within a housing that houses the components of UE 120, such as processor components and / or memory components. In some examples, the processor components and memory components may be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0039] Generally, any number of wireless networks 100 can be deployed in a given geographical area. Each wireless network 100 can support a specific RAT and can operate on one or more frequencies. A RAT may be referred to as a radio technology, air interface, etc. A frequency may be referred to as a carrier, frequency channel, etc. Each frequency in a given geographical area can support a single RAT to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0040] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using network node 110 as an intermediary device to communicate with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, or vehicle-to-pedestrian (V2P) protocols) and / or mesh networks. In such examples, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by network node 110.

[0041] Devices in Wireless Network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc., according to frequency or wavelength. For example, devices in Wireless Network 100 can communicate using one or more operating frequency bands. In 5G NR, two initial operating frequency bands have been designated as frequency ranges FR1 (410MHz to 7.125GHz) and FR2 (24.25GHz to 52.6GHz). It should be understood that although a portion of FR1 is greater than 6GHz, FR1 is often (interchangeably) referred to as the “sub-6GHz” band in various documents and articles. Similar naming issues sometimes occur with FR2, which is often (interchangeably) referred to as the “millimeter wave” band in documents and articles, although this is different from the Extremely High Frequency (EHF) band (30GHz to 300GHz) designated as a “millimeter wave” band by the International Telecommunication Union (ITU).

[0042] The frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR studies have identified the operating bands used for these mid-band frequencies as the frequency range designation FR3 (7.125 GHz to 24.25 GHz). Bands falling within FR3 can inherit FR1 and / or FR2 characteristics, and thus can effectively extend the features of FR1 and / or FR2 to mid-band frequencies. Furthermore, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating frequency bands have been identified as the frequency range designations FR4a or FR4-1 (52.6 GHz to 71 GHz), FR4 (52.6 GHz to 114.25 GHz), and FR5 (114.25 GHz to 300 GHz). Each of these higher frequency bands falls within the EHF band.

[0043] Considering the examples above, unless otherwise explicitly stated, it should be understood that when the term "below 6 GHz" is used herein, it can broadly refer to frequencies below 6 GHz, within FR1, or including intermediate frequency bands. Furthermore, unless otherwise explicitly stated, it should be understood that when the term "millimeter wave" is used herein, it can broadly refer to frequencies that can include intermediate frequency bands, within FR2, FR4, FR4-a, or FR4-1 and / or FR5, or within the EHF band. Modifications to frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) are considered, and the techniques described herein are applicable to those modified frequency ranges.

[0044] In some aspects, UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may use a low peak-to-average power ratio (PAPR) sequence generator to determine one or more demodulation reference signal (DMRS) scrambling sequences, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink multiple-input multiple-output (MIMO) communication, wherein the downlink MIMO communication is based on Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM); and to receive the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0045] In some aspects, the network node may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may use a low PAPR sequence generator to determine one or more DMRS scrambling sequences, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM; and to transmit the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences. Additionally or alternatively, the communication manager 150 may perform one or more other operations described herein.

[0046] As indicated above, Figure 1 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 1 The examples described are different.

[0047] Figure 2This is a diagram illustrating example 200 of communication between network node 110 and UE 120 in a wireless network 100 according to the present disclosure. Network node 110 may be equipped with a set of antennas 234a to 234t, such as T antennas (T≥1). UE 120 may be equipped with a set of antennas 252a to 252r, such as R antennas (R≥1). Network node 110 of example 200 includes one or more radio frequency components, such as antenna 234 and modem 254. In some examples, network node 110 may include an interface, communication components, or another component facilitating communication with UE 120 or another network node. Some network nodes 110 may not include radio frequency components facilitating direct communication with UE 120, such as one or more CUs or one or more DUs.

[0048] At network node 110, transmitting processor 220 may receive data from data source 212 intended for use by UE 120 (or a set of UEs 120). Transmitting processor 220 may select one or more modulation and decoding schemes (MCS) for UE 120 based at least in part on one or more channel quality indicators (CQIs) received from UE 120. Network node 110 may process (e.g., encode and modulate) the data for UE 120 based at least in part on the MCS selected for UE 120 and provide data symbols for UE 120. Transmitting processor 220 may process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper-layer signaling) and provide overhead symbols and control symbols. Transmitting processor 220 may generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and can provide a set of output symbol streams (e.g., T output symbol streams) to a set of corresponding modems 232 (e.g., T modems) (shown as modems 232a to 232t). For example, each output symbol stream can be provided to a modulator component (shown as MOD) of modem 232. Each modem 232 can use a corresponding modulator component to process the corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 232 can further use a corresponding modulator component to process the output sample stream (e.g., convert to analog, amplify, filter, and / or up-convert) to obtain a downlink signal. Modems 232a to 232t can transmit a set of downlink signals (e.g., T downlink signals) via a set of corresponding antennas 234 (e.g., T antennas) (shown as antennas 234a to 234t).

[0049] At UE 120, an array of antennas 252 (shown as antennas 252a to 252r) can receive downlink signals from network node 110 and / or other network nodes 110 and can provide an array of received signals (e.g., R received signals) to an array of modems 254 (e.g., R modems) (shown as modems 254a to 254r). For example, each received signal can be provided to a demodulator component (shown as DEMOD) of modem 254. Each modem 254 can use a corresponding demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) the received signal to obtain an input sample. Each modem 254 can use the demodulator component to further process the input sample (e.g., for OFDM) to obtain received symbols. MIMO detector 256 can obtain the received symbols from modem 254, perform MIMO detection on the received symbols where applicable, and provide the detected symbols. The receiver processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to the data sink 260, and provide decoded control and system information to the controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors, or a combination thereof. The channel processor can determine Reference Signal Received Power (RSRP) parameters, Received Signal Strength Indicator (RSSI) parameters, Reference Signal Received Quality (RSRQ) parameters, and / or CQI parameters, etc. In some examples, one or more components of the UE 120 may be included in the housing 284.

[0050] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, such as those in a core network. Network controller 130 may communicate with network node 110 via communication unit 294.

[0051] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include one or more antenna panels, one or more antenna groups, one or more collections of antenna elements, and / or one or more antenna arrays, etc., or may be included within one or more antenna panels, one or more antenna groups, one or more collections of antenna elements, and / or one or more antenna arrays, etc. Antenna panels, antenna groups, collections of antenna elements, and / or antenna arrays may include one or more antenna elements (within a single housing or multiple housings), collections of coplanar antenna elements, collections of non-coplanar antenna elements, and / or coupled to one or more transmitting and / or receiving components (such as...). Figure 2 One or more antenna elements (one or more components in the process).

[0052] On the uplink, at UE 120, the transmit processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reporting including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 can generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 can be pre-decoded by the TX MIMO processor 266, where applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to network node 110. In some examples, the modem 254 of UE 120 may include a modulator and demodulator. In some examples, UE 120 includes a transceiver. The transceiver may include any combination of antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein (e.g., references). Figures 4A to 8 ).

[0053] At network node 110, uplink signals from UE 120 and / or other UEs may be received by antenna 234, processed by modem 232 (e.g., a demodulator component of modem 232 shown as DEMOD), detected by MIMO detector 236 (where applicable), and further processed by receive processor 238 to obtain decoded data and control information transmitted by UE 120. Receive processor 238 may provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Network node 110 may include communication unit 244 and may communicate with network controller 130 via communication unit 244. Network node 110 may include scheduler 246 to schedule one or more UEs 120 for downlink and / or uplink communication. In some examples, modem 232 of network node 110 may include modulator and demodulator. In some examples, network node 110 includes transceiver. The transceiver may include any combination of antenna 234, modem 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein (e.g., references...). Figures 4A to 8 ).

[0054] The controller / processor 240 of network node 110, the controller / processor 280 of UE 120 and / or Figure 2Any other component may perform one or more techniques associated with low PAPR DMRS sequences and patterns, as described in more detail elsewhere herein. For example, the controller / processor 240 of network node 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component that can execute or direct, for example Figure 5 Process 500 Figure 6 The operation of process 600 and / or other processes as described herein. Memory 242 and memory 282 may store data and program code for network node 110 and UE 120, respectively. In some examples, memory 242 and / or memory 282 may include a non-transitory computer-readable medium that stores one or more instructions (e.g., code and / or program code) for wireless communication. For example, these one or more instructions may cause the one or more processors, UE 120 and / or network node 110 to perform or direct, for example, when executed by one or more processors of network node 110 and / or UE 120 (e.g., directly, or after compilation, transformation and / or interpretation). Figure 5 Process 500 Figure 6 The operation of process 600 and / or other processes as described herein. In some examples, the execution instructions may include run instructions, transform instructions, compile instructions, and / or interpret instructions, etc.

[0055] In some aspects, the UE (e.g., UE120) includes: means for determining one or more DMRS scrambling sequences using a low PAPR sequence generator, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM; and / or means for receiving the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences. Components for the UE 120 to perform the operations described herein may include, for example, one or more of a communication manager 140, an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, a TX MIMO processor 266, a controller / processor 280, or a memory 282.

[0056] In some aspects, a network node (e.g., network node 110) includes: means for determining one or more DMRS scrambling sequences using a low PAPR sequence generator, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM; and / or means for transmitting the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences. In some aspects, the means for the network node to perform the operations described herein may include, for example, one or more of a communication manager 150, a transmit processor 220, a TX MIMO processor 230, a modem 232, an antenna 234, a MIMO detector 236, a receive processor 238, a controller / processor 240, a memory 242, or a scheduler 246.

[0057] Although Figure 2 The boxes in the diagram are illustrated as different components, but the functions described above with respect to these boxes may be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 may be performed by or under the control of controller / processor 280.

[0058] As indicated above, Figure 2 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 2 The examples described are different.

[0059] Communication systems (such as 5G NR systems) can be deployed in various ways with a variety of components or parts. In a 5G NR system or network, network nodes, network entities, network mobility elements, RAN nodes, core network nodes, network elements, base stations, or network equipment can be implemented in aggregated or decomposed architectures. For example, base stations (such as Node B (NB), evolved NB (eNB), NR BS, 5G NB, access point (AP), TRP, or cell, etc.) or one or more units (or components) performing base station functions can be implemented as aggregated base stations (also known as standalone base stations or monolithic base stations) or decomposed base stations. A "network entity" or "network node" can refer to a decomposed base station or one or more units of a decomposed base station (such as one or more CUs, one or more DUs, one or more RUs, or combinations thereof).

[0060] Aggregated base stations (e.g., aggregated network nodes) can be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or cell). Decomposed base stations (e.g., decomposed network nodes) can be configured to utilize a protocol stack that is physically or logically distributed across two or more cells (such as one or more CUs, one or more DUs, or one or more RUs). In some examples, the CU may be implemented within a network node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed across one or more other network nodes. DUs may be implemented to communicate with one or more RUs. Each of the CU, DU, and RU may also be implemented as a virtual cell, such as a Virtual Central Unit (VCU), a Virtual Distributed Unit (VDU), or a Virtual Radio Unit (VRU), etc.

[0061] Base station type operation or network design can take into account the aggregation characteristics of base station functionality. For example, decomposed base stations can be utilized in IAB networks, Open Radio Access Networks (O-RAN (such as network configurations initiated by the O-RAN Alliance)), or Virtualized Radio Access Networks (vRAN, also known as Cloud Radio Access Networks (C-RAN)) to facilitate the scaling of communication systems by separating base station functionality into one or more units that can be deployed independently. Decomposed base stations can include functionality implemented by two or more units across various physical locations, as well as functionality virtually implemented for at least one unit, which enables flexibility in network design. Each unit of a decomposed base station can be configured for wired or wireless communication with at least one other unit of the decomposed base station.

[0062] Figure 3 This is an illustration of an example disaggregated base station architecture 300 according to the present disclosure. The disaggregated base station architecture 300 may include a CU 310, which may communicate directly with the core network 320 via a backhaul link, or indirectly with the core network 320 via one or more disaggregated control units (such as near-RT RIC 325 via an E2 link, or a non-RT RIC 315 associated with a Service Management and Orchestration (SMO) framework 305, or both). The CU 310 may communicate with one or more DUs 330 via a corresponding midhaul link, such as via an F1 interface. Each DU 330 may communicate with one or more RUs 340 via a corresponding fronthaul link. Each RU 340 may communicate with one or more UEs 120 via a corresponding radio frequency (RF) access link. In some implementations, a UE 120 may be served simultaneously by multiple RUs 340.

[0063] Each unit in the clusters (including CU 310, DU 330, RU 340), as well as the near-RT RIC 325, non-RT RIC 315, and SMO frame 305, may include or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via wired or wireless transmission media. Each unit in the cluster, or an associated processor or controller providing instructions to one or more communication interfaces of the respective unit, may be configured to communicate with one or more units in other clusters via transmission media. In some examples, each unit in these clusters may include a wired interface and a wireless interface, the wired interface being configured to receive signals via a wired transmission media or transmit signals to one or more units in other clusters, and the wireless interface may include a receiver, transmitter, or transceiver (such as an RF transceiver) configured to receive signals via a wireless transmission media or transmit signals to one or more units in other clusters, or both.

[0064] In some aspects, the CU 310 can host one or more higher-level control functions. Such control functions may include Radio Resource Control (RRC) functions, Packet Data Convergence Protocol (PDCP) functions, or Service Data Adaptation Protocol (SDAP) functions, etc. Each control function can be implemented using an interface configured to signal to other control functions hosted by the CU 310. The CU 310 can be configured to handle user plane functions (e.g., Central Unit-User Plane (CU-UP) functions), control plane functions (e.g., Central Unit-Control Plane (CU-CP) functions), or combinations thereof. In some implementations, the CU 310 can be logically divided into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP units can communicate bidirectionally with the CU-CP units via an interface such as an E1 interface. The CU 310 can be implemented to communicate with the DU 330 for network control and signaling purposes, as needed.

[0065] Each DU 330 may correspond to a logical unit comprising one or more base station functions for controlling the operation of one or more RU 340s. In some aspects, the DU 330 may host one or more of the Radio Link Control (RLC) layer, MAC layer, and one or more high physical (PHY) layers, at least in part, according to functional partitioning such as that defined by 3GPP. In some aspects, the one or more high PHY layers may be implemented by one or more modules for forward error correction (FEC) encoding and decoding, scrambling, and modulation and demodulation, etc. In some aspects, the DU 330 may also host one or more low PHY layers, such as those implemented by one or more modules for Fast Fourier Transform (FFT), Inverse FFT (iFFT), Digital Beamforming, or Physical Random Access Channel (PRACH) extraction and filtering, etc. Each layer (which may also be referred to as a module) may be implemented using an interface configured to communicate signals with other layers (and modules) hosted by the DU 330 or with control functions hosted by the CU310.

[0066] Each RU 340 can implement lower-layer functionality. In some deployments, the RU 340 controlled by the DU 330 may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions such as performing FFT, performing iFFT, digital beamforming, or PRACH extraction and filtering, etc., based on functional partitioning (e.g., functional partitioning defined by 3GPP) such as lower-layer functional partitioning. In such architectures, each RU 340 can be operated to handle over-the-air (OTA) communication with one or more UEs 120. In some specific implementations, the real-time and non-real-time aspects of communication with the control plane and user plane of the RU 340 may be controlled by the corresponding DU 330. In some scenarios, this configuration allows each DU 330 and CU 310 to be implemented in a cloud-based RAN architecture such as vRAN.

[0067] SMO framework 305 can be configured to support RAN deployment and provisioning of both non-virtualized and virtualized network elements. For non-virtualized network elements, SMO framework 305 can be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which can be managed via operation and maintenance interfaces such as the O1 interface. For virtualized network elements, SMO framework 305 can be configured to interact with cloud computing platforms such as the Open Cloud (O-Cloud) platform 390 to perform network element lifecycle management (such as instantiating virtualized network elements) via cloud computing platform interfaces such as the O2 interface. Such virtualized network elements may include, but are not limited to, CU 310, DU 330, RU 340, non-RT RIC 315, and near-RTTRIC 325. In some specific implementations, SMO framework 305 can communicate with the hardware aspects of the 4G RAN (such as the Open eNB (O-eNB) 311) via the O1 interface. Additionally, in some implementations, the SMO framework 305 can communicate directly with each of one or more RUs 340 via a corresponding O1 interface. The SMO framework 305 may also include a non-RT RIC 315 configured to support the functionality of the SMO framework 305.

[0068] The non-RT RIC 315 can be configured to include logical functions enabling non-real-time control and optimization of RAN elements and resources, including AI / ML workflows for model training and updates, or policy-based guidance for applications / features in the near-RT RIC 325. The non-RT RIC 315 can be coupled to or communicate with the near-RT RIC 325, such as via an A1 interface. The near-RT RIC 325 can be configured to include logical functions enabling near real-time control and optimization of RAN elements and resources via an interface, such as an E2 interface, through data collection and action, connecting one or more CU 310s, one or more DU 330s, or both, and O-eNBs to the near-RT RIC 325.

[0069] In some implementations, to generate AI / ML models to be deployed in the near-RT RIC 325, the non-RT RIC 315 may receive parameters or external enrichment information from an external server. This information can be utilized by the near-RT RIC 325 and can be received from non-network data sources or network functions at the SMO framework 305 or the non-RT RIC 315. In some examples, the non-RT RIC 315 or near-RT RIC 325 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 315 may monitor long-term trends and patterns in performance and employ AI / ML models to perform corrective actions via the SMO framework 305 (such as reconfiguration via the O1 interface) or via the creation of RAN management policies (such as A1 interface policies).

[0070] As indicated above, Figure 3 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 3 The examples described are different.

[0071] According to some wireless communication standards, Orthogonal Frequency Division Multiplexing (OFDM) waveforms are the only configurable waveforms available for downlink data communications, such as Physical Downlink Shared Channel (PDSCH) communications. It is worth noting that some wireless communication standards support the use of waveforms based on Discrete Fourier Transform Extended OFDM (DFT-s-OFDM) (also known as transform pre-decoding), but only for uplink communications with a single spatial layer.

[0072] Additionally, the demodulation reference signal (DMRS) scrambling sequence to be used for PDSCH communication can be based on a pseudo-random quadrature phase shift keying (QPSK) sequence, which is determined based on the output of a Gold sequence generator. Such scrambling sequences are designed such that the peak-to-average power ratio (PAPR) of the DMRS does not exceed the PAPR of the symbols carrying data in the downlink communication, assuming OFDM waveforms are used for downlink communication.

[0073] It is worth noting that when operating in the sub-THz band (e.g., at approximately 52 GHz or above), single-carrier waveforms (such as DFT-s-OFDM) are superior to OFDM for downlink multiple-input multiple-output (MIMO) communications. One reason for the superiority of single-carrier waveforms over OFDM for downlink MIMO communications is that strong phase noise is expected in the sub-THz band (due to the relatively high carrier frequency), and single-carrier waveforms provide improved phase noise resilience by allowing the use of a time-domain phase tracking reference signal (PTRS) to provide phase noise suppression. Another reason for the superiority of single-carrier waveforms over OFDM for downlink MIMO communications in the sub-THz band is the challenge of designing high-efficiency power amplifiers (PAs), and PAs in the sub-THz band suffer from inefficiency and limited linear region. To mitigate this problem, single-carrier waveforms that naturally exhibit lower PAPR characteristics are preferred.

[0074] In an illustrative example, the table below shows the throughput (TP) gain achievable using a DFT-s-OFDM waveform compared to an OFDM waveform for different signal-to-noise ratio (SNR) values:

[0075] SNR[dB] OFDM TP [Gbps] DFT-s-OFDM TP[Gbps] TP gain [%] 15 47.7 57.6 22％ 20 67.5 79.9 18％ 25 89.3 104.1 17％ 30 103.8 122.5 18％ 35 112.4 138.8 25％

[0076] In this example, a simulation was used that assumes a 4×4 downlink MIMO use case at a carrier frequency of 144 GHz (and assumptions about associated phase noise masking), with a bandwidth of 7.5 GHz and a subcarrier spacing (SCS) of 960 kHz.

[0077] However, even when DFT-s-OFDM waveforms are available for downlink MIMO communication, the DMRS symbols associated with the downlink MIMO communication will still be OFDM-based. This is necessary to achieve frequency domain equalization that can be achieved using only OFDM-based DMRS.

[0078] When considering the low PAPR of DFT-s-OFDM waveforms (compared to OFDM waveforms), the DMRS scrambling sequence determined based on the Golden sequence generator is no longer sufficient, as DMRS symbols can exhibit a higher PAPR than the data-carrying symbols in downlink MIMO communication. This problem is exacerbated for sub-Th GHz wireless communication, where large bandwidths (e.g., on the order of GHz) are used to support extreme data rates, leading to even higher PAPRs. Therefore, the DMRS scrambling sequence generation should be adjusted so that the DMRS PAPR is equal to or lower than the PAPR of the data-carrying symbols in downlink MIMO communication.

[0079] Some of the techniques and apparatus described herein implement low PAPR DMRS sequences and patterns. In some aspects, a wireless communication device (e.g., a UE, a network node, etc.) may use a low PAPR sequence generator to determine one or more DMRS scrambling sequences, wherein each DMRS scrambling sequence corresponds to a corresponding port among one or more ports associated with downlink MIMO communication (e.g., DFT-s-OFDM-based communication). The wireless communication device may then communicate (e.g., transmit or receive) downlink MIMO communication including DMRS according to an in-slot DMRS pattern indicating one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences.

[0080] In some respects, the techniques and apparatus described herein enable the use of low PAPR DFT-s-OFDM waveforms for downlink MIMO transmission (e.g., in sub-Th GHz bands), thereby allowing the increased throughput, range extension, and power efficiency provided by using low PAPR DFT-s-OFDM waveforms. For example, as described herein, low PAPR DMRS scrambling sequences can make the PAPR in one or more DMRS symbols approximately equal to or lower than the PAPR in the data-carrying symbols of downlink MIMO communication, thereby facilitating the use of low PAPR DFT-s-OFDM waveforms for downlink MIMO transmission. Furthermore, the in-slot DMRS modes described herein can be used to implement low PAPR in one or more DMRS symbols, further facilitating the use of low PAPR DFT-s-OFDM waveforms for downlink MIMO transmission. Additionally, the techniques and apparatus described herein enable the support of a large number of ports (e.g., more than 12 ports) to be used for downlink MIMO communication. Additional details are provided below.

[0081] Figure 4A and Figure 4B This is an illustration of example 400 associated with low PAPR DMRS sequences and patterns according to this disclosure. (See example 400.) Figure 4A As shown, Example 400 includes communication between network node 110 and UE 120. In some aspects, network node 110 and UE 120 may be included in a wireless network (such as wireless network 100). Network node 110 and UE 120 may communicate via a wireless access link (which may include an uplink and a downlink).

[0082] As shown in reference numeral 402, UE 120 may use a low PAPR sequence generator to determine one or more DMRS scrambling sequences. In some aspects, each of the one or more DMRS scrambling sequences may correspond to a corresponding port among one or more ports, wherein each of the one or more ports is associated with downlink MIMO communication. That is, downlink MIMO communication may be scheduled to be transmitted by network node 110 and received by UE 120 via one or more ports. Here, each of the one or more DMRS scrambling sequences determined by the low PAPR sequence generator may correspond to a different port among one or more ports. In some aspects, the downlink communication is DFT-s-OFDM based communication.

[0083] In some respects, the low PAPR sequence generator is a Zadoff-Chu (ZC) sequence generator. That is, in some respects, the UE 120 is configured with a low PAPR sequence generator that is configured to generate one or more DMRS scrambling sequences based on one or more ZC sequences. It is noteworthy that the number of ZC sequences that can be generated by the UE 120 is not significantly limited in higher frequency bands (e.g., sub-Th Hz bands) because the required sequence length is relatively large due to the relatively large bandwidth used for wireless communication in higher frequency bands. Furthermore, the relatively high attenuation of wireless communication in sub-Th Hz bands, along with the directivity of the transmit beam used for wireless communication, reduces inter-cell interference.

[0084] Additionally, ZC sequences are constant amplitude zero autocorrelation waveform (CAZAC) sequences, which maintain the property of time-domain-frequency equivalence, meaning that the inverse DFT of a given ZC sequence results in another scaled ZC sequence. Therefore, using ZC sequences enables the achievement of extremely low PAPR. However, this property is not maintained when using orthogonal overlay codes (OCC) and frequency-domain multiplexing (FDM) of multiple sequences (corresponding to different ports) in a DMRS symbol to support downlink MIMO communication. In some aspects, this limitation can be mitigated by implementing an intra-slot DMRS mode in which each DMRS symbol is at least partially assigned a sequence corresponding to a single spatial layer (i.e., a single port), and the different spatial layers are time-domain multiplexed (TDM). In some aspects, such an intra-slot DMRS mode eliminates the need for OCC and FDM to support multiple ports. Additional details regarding intra-slot DMRS modes are described below.

[0085] As shown in reference numeral 404, network node 110 may use a low PAPR sequence generator to determine one or more DMRS scrambling sequences, wherein each DMRS scrambling sequence corresponds to a corresponding port among one or more ports associated with downlink MIMO communication. In some respects, network node 110 may determine one or more DMRS scrambling sequences in a manner similar to that used by UE 120 to determine one or more DMRS scrambling sequences, as described herein.

[0086] As shown in reference numeral 406, network node 110 can transmit according to an in-slot DMRS mode, and UE 120 can receive the downlink MIMO communication including DMRS according to an in-slot DMRS mode. In some aspects, the downlink MIMO communication is transmitted on frequencies greater than approximately 52 GHz (e.g., transmitted by network node 110 or received by UE 120). For example, in some aspects, the downlink MIMO communication can be transmitted in a sub-THz frequency band.

[0087] In some aspects, this in-slot DMRS mode indicates one or more time-domain multiplexed symbols, wherein each of the one or more time-domain multiplexed symbols is at least partially assigned at least one DMRS scrambling sequence from the one or more DMRS scrambling sequences. Notably, this type of in-slot DMRS mode eliminates the need for OCC and FDM to support the use of multiple ports to transmit the downlink MIMO communication. In some aspects, this in-slot DMRS mode enables communication via a large number of ports (e.g., more than 12 ports). For sub-Thz cases, such a large number of ports can be used, for example, for lens MIMO, where each port corresponds to a different beam.

[0088] Figure 4B This is a diagram illustrating an example of an intra-slot DMRS mode, which indicates one or more time-domain multiplexed symbols, each of which is at least partially assigned at least one DMRS scrambling sequence from the one or more DMRS scrambling sequences. Figure 4B In the example shown, the DMRS mode within this time slot is used for a set of time slots (e.g., Figure 4B The first time slot in time slots 1 to 3 is shown (e.g., as shown in the diagram). Figure 4BIn the identified time slot 1). Here, as shown in the figure, within this time slot, the DMRS pattern indicates that the first time-domain multiplexed symbol (e.g., symbol 0) of the first time slot is at least partially assigned a first DMRS scrambling sequence (e.g., DMRS scrambling sequence A), where the first DMRS scrambling sequence corresponds to a first port (e.g., port 1) associated with the downlink MIMO communication. The DMRS pattern within the time slot also indicates that the second time-domain multiplexed symbol (e.g., symbol 1) of the first time slot is at least partially assigned a second DMRS scrambling sequence (e.g., DMRS scrambling sequence B), where the second DMRS scrambling sequence corresponds to a second port (e.g., port 2) associated with the downlink MIMO communication. The DMRS pattern within the time slot also indicates that the third time-domain multiplexed symbol (e.g., symbol 2) of the first time slot is at least partially assigned a third DMRS scrambling sequence (e.g., DMRS scrambling sequence C), where the third DMRS scrambling sequence corresponds to a third port (e.g., port 3) associated with the downlink MIMO communication. The DMRS pattern within the time slot also indicates that the fourth time-domain multiplexed symbol (e.g., symbol 3) of the first time slot is at least partially assigned a fourth DMRS scrambling sequence (e.g., DMRS scrambling sequence D), where the fourth DMRS scrambling sequence corresponds to a fourth port (e.g., port 4) associated with the downlink MIMO communication. As shown in the figure, the other symbols of the first time slot (and the symbols of time slot 2 and time slot 3) may carry data associated with the downlink MIMO communication. The DMRS pattern within the time slot (such as Figure 4B the DMRS pattern within the time slot illustrated) can keep the PAPR of the symbols carrying DMRS at a low PAPR (e.g., less than or approximately equal to the PAPR of the symbols carrying data), which means that the PAPR of the DMRS symbols is not a limiting factor for conveying the downlink MIMO communication. In addition, the low PAPR achieved using the DMRS pattern within the time slot (such as Figure 4B the DMRS pattern within the time slot illustrated) provides a channel estimation processing gain in the symbols carrying DMRS.

[0089] In some aspects, the DMRS pattern within the time slot may indicate that a given symbol in the one or more time-domain multiplexed symbols is partially assigned a single DMRS scrambling sequence among the one or more DMRS scrambling sequences. For example, the given symbol may include N frequency resources (e.g., subcarriers, resource blocks, etc.), and the DMRS pattern within the time slot may indicate that M (M < N) of the N frequency resources are assigned the single DMRS scrambling sequence. In some aspects, the partial assignment of the given symbol with a single DMRS scrambling sequence may provide inter-carrier interference (ICI) suppression (e.g., caused by phase noise impairment) on the given symbol, or may improve channel estimation.

[0090] Additionally or alternatively, the in-slot DMRS mode may indicate that a given symbol in one or more time-domain multiplexed symbols is fully allocated a single DMRS scrambling sequence from the one or more DMRS scrambling sequences. For example, the given symbol may include N frequency resources, and the in-slot DMRS mode may indicate that each of the N frequency resources is allocated the single DMRS scrambling sequence. In some aspects, the full allocation of the given symbol with a single sequence can provide channel estimation processing gain (e.g., due to increased frequency domain resolution). Additionally, the full allocation of the given symbol can increase the possible number of usable sequences, which facilitates the use of low PAPR sequence generators, as described above.

[0091] In some respects, whether a given symbol is fully or partially assigned can be based at least in part on the dominant damage associated with that symbol. In some respects, the determination of whether a given symbol is fully or partially assigned can be independent of such determination for another symbol (e.g., each symbol can be assigned independently).

[0092] In some aspects, the partial allocation of symbols carrying DMRS may depend on the dominant impairment being performed using different comb factors (e.g., controlling the number of zero-power REs among the allocated resource elements (REs)). In some aspects, assuming that each DMRS symbol contains only a single layer (while the data-carrying symbols in a time slot contain all layers), network node 110 may (e.g., according to an applicable wireless communication standard) be configured with a DMRS boost factor to be applied to the full allocation of DMRS symbols. In some aspects, this DMRS boost factor may be adjusted such that, at different PAPR values, the power of the symbols carrying DMRS will be increased (e.g., maximized).

[0093] In some aspects, the intra-slot DMRS mode indicates that symbols in the one or more time-domain multiplexed symbols are at least partially allocated with a first DMRS scrambling sequence and at least partially allocated with a second DMRS scrambling sequence. For example, the intra-slot DMRS mode may indicate that M1 (M1≥1) frequency resources (e.g., subcarrier resource blocks, etc.) of a given symbol are allocated with a first DMRS scrambling sequence, and M2 (M2≥1) frequency resources (e.g., subcarrier resource blocks, etc.) of the given symbol are allocated with a second DMRS scrambling sequence, where the given symbol comprises N frequency resources. In this example, the sum of M1 and M2 is less than or equal to N. In some aspects, multiple DMRS scrambling sequences (e.g., two DMRS scrambling sequences) corresponding to respective ports can be multiplexed on a given DMRS symbol while still utilizing the intra-slot DMRS mode described herein to, for example, reduce DMRS overhead.

[0094] It is worth noting that while the intra-slot DMRS mode described herein can be used for DFT-s-OFDM based waveforms, it can also be applied to communications using OFDM waveforms (e.g., with or without ZC sequences). In some respects, applying this intra-slot DMRS mode to OFDM waveforms can reduce PAPR in symbols carrying DMRS, thereby increasing the channel estimation processing gain.

[0095] In some aspects, network node 110 may transmit, and UE 120 may receive, a configuration indicating the DMRS mode within the time slot. In some aspects, this configuration is communicated (e.g., transmitted or received) via downlink control information (DCI), media access control (MAC) control element (CE), or radio resource control (RRC) signaling. In some aspects, network node 110 may transmit the configuration at least in part based on determining that the characteristics of the channel associated with the downlink MIMO communication meet a threshold. For example, network node 110 may transmit the configuration for the DMRS mode within the time slot to UE 120 at least in part based on determining that the SNR of the channel associated with the downlink MIMO communication meets a threshold. In this way, network node 110 may (dynamically) adjust the mode within the time slot (e.g., change a given symbol from partial allocation to full allocation, and vice versa) to increase the throughput, reliability, etc., of wireless communication.

[0096] In some respects, network node 110 may transmit the DMRS according to an inter-slot DMRS mode, and UE 120 may receive the DMRS according to an inter-slot DMRS mode, which indicates one or more time slots in the downlink MIMO communication in which the DMRS is to be received. For example, refer to Figure 4B The inter-slot DMRS mode indicates that the DMRS is transmitted only in the first time slot among multiple time slots (e.g., time slot 1, time slot 2, and time slot 3). In some aspects, the inter-slot DMRS mode indicates that the DMRS is carried in a relatively small number of time slots among a given number of time slots (e.g., one time slot out of every eight time slots). Such an inter-slot DMRS mode may be referred to as a sparse inter-slot DMRS mode. In some aspects, a sparse inter-slot DMRS mode can lead to reduced PDSCH pilot overhead and increased data rate (e.g., compared to a less sparsity inter-slot DMRS mode). In some aspects, a sparse inter-slot DMRS mode can be used in combination with the intra-slot DMRS mode described herein to reduce overhead (e.g., although the number of symbols carrying the DMRS according to the intra-slot DMRS mode is greater than the number of symbols typically used to carry the DMRS).

[0097] In some respects, the sparse time-slot DMRS mode is applicable to downlink MIMO communication in the sub-THz band because UE 120 using the sub-THz band is expected to be relatively static (e.g., low mobility) and the channel in the sub-THz band will be relatively flat (e.g., due to low latency spread and strong line-of-sight components).

[0098] In some aspects, network node 110 may transmit and UE 120 may receive a configuration indicating the inter-slot DMRS mode. In some aspects, this configuration is communicated (e.g., transmitted or received) via DCI, MAC-CE, or RRC signaling. In some aspects, network node 110 may transmit the configuration at least in part based on determining that the characteristics of the channel associated with the downlink MIMO communication meet a threshold. For example, network node 110 may transmit the configuration for the inter-slot DMRS mode to UE 120 at least in part based on determining that the SNR of the channel associated with the downlink MIMO communication meets (e.g., above or below) a threshold. In this way, network node 110 may (dynamically) adjust the inter-slot mode to increase wireless communication throughput, reliability, etc.

[0099] As indicated above, Figure 4A and Figure 4B This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 4A and Figure 4B The examples described are different.

[0100] Figure 5 This is a diagram illustrating an example procedure 500 performed by a UE according to this disclosure. Example procedure 500 is an example in which a UE (e.g., UE 120) performs operations associated with a low PAPR DMRS sequence and mode.

[0101] like Figure 5 As shown, in some aspects, process 500 may include using a low PAPR sequence generator to determine one or more DMRS scrambling sequences, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM communication (box 510). For example, a UE (e.g., using...) Figure 7The communication manager 140 and / or the low PAPR scrambling sequence generator 708 depicted may use the low PAPR sequence generator to determine one or more DMRS scrambling sequences, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port in one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM communication, as described above.

[0102] like Figure 5 Further shown, in some aspects, process 500 may include receiving the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one DMRS scrambling sequence from the one or more DMRS scrambling sequences (box 520). For example, the UE (e.g., using...) Figure 7 The communication manager 140 and / or receiving component 702 depicted herein can receive the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences, as described above.

[0103] Process 500 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere in this document.

[0104] In a first aspect, the DMRS mode within the time slot indicates that a symbol in the one or more time-domain multiplexed symbols is partially assigned a single DMRS scrambling sequence from the one or more DMRS scrambling sequences.

[0105] In a second aspect, either alone or in combination with the first aspect, the DMRS mode within the time slot indicates that the symbols in the one or more time-domain multiplexed symbols are fully allocated a single DMRS scrambling sequence from the one or more DMRS scrambling sequences.

[0106] In a third aspect, either alone or in combination with one or more of the first and second aspects, the intra-slot DMRS mode indicates that the symbols in the one or more time-domain multiplexed symbols are at least partially assigned a first DMRS scrambling sequence in the one or more DMRS scrambling sequences, and at least partially assigned a second DMRS scrambling sequence in the one or more DMRS scrambling sequences.

[0107] In the fourth aspect, alone or in combination with one or more of the first to third aspects, the low PAPR sequence generator is the Zadoff-Chu sequence generator.

[0108] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the downlink MIMO communication is received at a frequency greater than approximately 52 GHz.

[0109] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, process 500 includes receiving a configuration indicating the DMRS mode within the time slot.

[0110] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the configuration is received via at least one of DCI, MAC-CE, or RRC signaling.

[0111] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the DMRS is received according to an inter-slot DMRS mode that indicates one or more time slots in the multiple time slots of the downlink MIMO communication in which the DMRS is to be received.

[0112] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, process 500 includes receiving a configuration indicating the inter-slot DMRS mode.

[0113] In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the configuration is received via at least one of DCI, MAC-CE, or RRC signaling.

[0114] although Figure 5 An example box of process 500 is shown, but in some respects, process 500 may include... Figure 5 The boxes depicted in the diagram may be fewer, different, or arranged differently than additional boxes. Alternatively, two or more boxes in the process 500 may be executed in parallel.

[0115] Figure 6 This is a diagram illustrating an example process 600 performed by a network node according to this disclosure. Example process 600 is an example in which a network node (e.g., network node 110) performs operations associated with low PAPR DMRS sequences and patterns.

[0116] like Figure 6As shown, in some aspects, process 600 may include using a low PAPR sequence generator to determine one or more DMRS scrambling sequences, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM communication (box 610). For example, network nodes (e.g., using...) Figure 8 The communication manager 150 and / or low PAPR scrambling sequence generator 808 depicted may use the low PAPR sequence generator to determine one or more DMRS scrambling sequences, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port in one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM communication, as described above.

[0117] like Figure 6 Further shown, in some aspects, process 600 may include: transmitting the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one DMRS scrambling sequence from the one or more DMRS scrambling sequences (box 620). For example, network nodes (e.g., using...) Figure 8 The communication manager 150 and / or the transmitting component 804 depicted herein may transmit the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences, as described above.

[0118] Process 600 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere in this document.

[0119] In a first aspect, the DMRS mode within the time slot indicates that the symbols in the one or more time-domain multiplexed symbols are at least partially assigned a single DMRS scrambling sequence from the one or more DMRS scrambling sequences.

[0120] In a second aspect, either alone or in combination with the first aspect, the DMRS mode within the time slot indicates that the symbols in the one or more time-domain multiplexed symbols are fully allocated a single DMRS scrambling sequence from the one or more DMRS scrambling sequences.

[0121] In a third aspect, either alone or in combination with one or more of the first and second aspects, the intra-slot DMRS mode indicates that the symbols in the one or more time-domain multiplexed symbols are at least partially assigned a first DMRS scrambling sequence in the one or more DMRS scrambling sequences, and at least partially assigned a second DMRS scrambling sequence in the one or more DMRS scrambling sequences.

[0122] In the fourth aspect, alone or in combination with one or more of the first to third aspects, the low PAPR sequence generator is the Zadoff-Chu sequence generator.

[0123] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the downlink MIMO communication is transmitted at a frequency greater than approximately 52 GHz.

[0124] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, process 600 includes sending a configuration indicating the DMRS mode within the time slot.

[0125] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the configuration is transmitted via at least one of DCI, MAC-CE, or RRC signaling.

[0126] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, process 600 includes: transmitting the configuration based at least in part on determining that the characteristics of the channel associated with the downlink MIMO communication meet a threshold.

[0127] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the DMRS is received according to an inter-slot DMRS mode that indicates one or more time slots in the multiple time slots of the downlink MIMO communication in which the DMRS is to be transmitted.

[0128] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, process 600 includes: sending a configuration indicating the DMRS mode between the time slots.

[0129] In the eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, the configuration is transmitted via at least one of DCI, MAC-CE, or RRC signaling.

[0130] In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, process 600 includes: transmitting the configuration based at least in part on determining that the characteristics of the channel associated with the downlink MIMO communication meet a threshold.

[0131] although Figure 6 An example box of process 600 is shown, but in some respects, process 600 may include... Figure 6 The boxes depicted in the diagram may be fewer, different, or arranged differently than additional boxes. Alternatively, two or more boxes in the process 600 may be executed in parallel.

[0132] Figure 7 This is a diagram of an example device 700 for wireless communication according to the present disclosure. Device 700 may be a UE, or a UE may include device 700. In some aspects, device 700 includes a receiving component 702 and a transmitting component 704 that can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 700 can use the receiving component 702 and the transmitting component 704 to communicate with another device 706 (such as a UE, a base station, or another wireless communication device). As further shown, device 700 may include a communication manager 140. Communication manager 140 may include a low PAPR scrambling sequence generator 708, etc.

[0133] In some respects, device 700 can be configured to perform the functions described herein. Figure 4A and Figure 4B One or more operations described herein. Additionally or alternatively, the apparatus 700 may be configured to perform one or more processes described herein, such as Figure 5 The process 500. In some aspects, the apparatus 700 and / or Figure 7 One or more components shown may include combinations Figure 2 One or more components of the UE described. Additionally or alternatively, Figure 7 One or more components shown can be combined Figure 2 Implementation within one or more components described. Additionally or alternatively, one or more components of the set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0134] Receiver 702 may receive communications from device 706, such as reference signals, control information, data communications, or combinations thereof. Receiver 702 may provide the received communications to one or more other components of device 700. In some aspects, receiver 702 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) and may provide the processed signals to one or more other components of device 700. In some aspects, receiver 702 may include combinations of... Figure 2 The described UE includes one or more antennas, modems, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0135] Transmitting component 704 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 706. In some aspects, one or more other components of device 700 can generate communications and provide the generated communications to transmitting component 704 for transmission to device 706. In some aspects, transmitting component 704 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and can transmit the processed signals to device 706. In some aspects, transmitting component 704 may include combinations of... Figure 2 The described UE includes one or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof. In some aspects, the transmit component 704 may be co-located with the receive component 702 in a transceiver.

[0136] A low PAPR scrambling sequence generator 708 may be used to determine one or more DMRS scrambling sequences, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM. A receiving component 702 may receive the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one DMRS scrambling sequence from the one or more DMRS scrambling sequences.

[0137] The receiving component 702 can receive a configuration indicating the DMRS mode within the time slot.

[0138] The receiving component 702 can receive a configuration indicating the DMRS mode for that time slot.

[0139] Figure 7 The number and arrangement of components shown are provided as an example. In reality, they can exist in... Figure 7 The components shown are compared to additional components, fewer components, different components, or components arranged in a different manner. Additionally, Figure 7 The two or more components shown can be implemented within a single component, or Figure 7 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 7 The collection of (one or more) components shown is executable and described as being composed of Figure 7 Another set of components shown performs one or more functions.

[0140] Figure 8 This is a diagram of an example device 800 for wireless communication according to the present disclosure. Device 800 may be a network node, or a network node may include device 800. In some aspects, device 800 includes a receiving component 802 and a transmitting component 804 that can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 800 can use the receiving component 802 and the transmitting component 804 to communicate with another device 806 (such as a UE, a base station, or another wireless communication device). As further shown, device 800 may include a communication manager 150. Communication manager 150 may include a low PAPR scrambling sequence generator 808, etc.

[0141] In some respects, device 800 can be configured to perform the functions described herein. Figure 4A and Figure 4B One or more operations described herein. Additionally or alternatively, device 800 may be configured to perform one or more processes described herein, such as Figure 6 The process is 600. In some respects, Figure 8 The illustrated device 800 and / or one or more components may include a combination Figure 2 One or more components of the described network node. Additionally or alternatively, Figure 8 One or more components shown can be combined Figure 2 Implementation within one or more components described. Additionally or alternatively, one or more components of the set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0142] Receiver 802 may receive communications from device 806, such as reference signals, control information, data communications, or combinations thereof. Receiver 802 may provide the received communications to one or more other components of device 800. In some aspects, receiver 802 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) and may provide the processed signals to one or more other components of device 800. In some aspects, receiver 802 may include combinations of... Figure 2 The network node described includes one or more antennas, modems, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0143] Transmitting component 804 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 806. In some aspects, one or more other components of device 800 can generate communications and provide the generated communications to transmitting component 804 for transmission to device 806. In some aspects, transmitting component 804 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and can transmit the processed signals to device 806. In some aspects, transmitting component 804 may include combinations of... Figure 2 The described network node includes one or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof. In some aspects, the transmit component 804 may be co-located with the receive component 802 in a transceiver.

[0144] A low PAPR scrambling sequence generator 808 may be used to determine one or more DMRS scrambling sequences, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM. A transmitting component 804 may transmit the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one DMRS scrambling sequence from the one or more DMRS scrambling sequences.

[0145] The transmitting component 804 can transmit a configuration indicating the DMRS mode within the time slot.

[0146] The transmitting component 804 may transmit the configuration at least in part based on determining that the characteristics of the channel associated with the downlink MIMO communication meet a threshold.

[0147] The transmitting component 804 can transmit a configuration indicating the DMRS mode for that time slot.

[0148] The transmitting component 804 may transmit the configuration at least in part based on determining that the characteristics of the channel associated with the downlink MIMO communication meet a threshold.

[0149] Figure 8 The number and arrangement of components shown are provided as an example. In reality, they can exist in... Figure 8 The components shown are compared to additional components, fewer components, different components, or components arranged in a different manner. Additionally, Figure 8 The two or more components shown can be implemented within a single component, or Figure 8 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 8 The collection of (one or more) components shown is executable and described as being composed of Figure 8 Another set of components shown performs one or more functions.

[0150] The following provides an overview of some aspects of this disclosure:

[0151] Aspect 1: A method for wireless communication performed by a UE, the method comprising: determining one or more DMRS scrambling sequences using a low PAPR sequence generator, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports, the one or more ports being associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM; and receiving the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one DMRS scrambling sequence among the one or more DMRS scrambling sequences.

[0152] Aspect 2: According to the method of aspect 1, wherein the intra-slot DMRS mode indicates that a symbol in one or more time-domain multiplexed symbols is partially assigned a single DMRS scrambling sequence from the one or more DMRS scrambling sequences.

[0153] Aspect 3: The method according to any one of Aspects 1 to 2, wherein the intra-slot DMRS mode indicates that the symbols in the one or more time-domain multiplexed symbols are fully allocated with a single DMRS scrambling sequence in the one or more DMRS scrambling sequences.

[0154] Aspect 4: The method according to any one of Aspects 1 to 3, wherein the intra-slot DMRS mode indicates that the symbols in the one or more time-domain multiplexed symbols are at least partially assigned a first DMRS scrambling sequence in the one or more DMRS scrambling sequences, and at least partially assigned a second DMRS scrambling sequence in the one or more DMRS scrambling sequences.

[0155] Aspect 5: The method according to any one of Aspects 1 to 4, wherein the low PAPR sequence generator is a Zadoff-Chu sequence generator.

[0156] Aspect 6: The method according to any one of Aspects 1 to 5, wherein the downlink MIMO communication is received at a frequency greater than about 52 GHz.

[0157] Aspect 7: The method according to any one of aspects 1 to 6, the method further comprising: receiving a configuration indicating the DMRS mode within the time slot.

[0158] Aspect 8: The method according to aspect 7, wherein the configuration is received via at least one of DCI, MAC-CE or RRC signaling.

[0159] Aspect 9: The method according to any one of Aspects 1 to 8, wherein the DMRS is received according to an inter-slot DMRS mode, the inter-slot DMRS mode indicating one or more time slots in a plurality of time slots of the downlink MIMO communication in which the DMRS is to be received.

[0160] Aspect 10: The method according to aspect 9 further includes: receiving a configuration indicating the inter-slot DMRS mode.

[0161] Aspect 11: The method according to aspect 10, wherein the configuration is received via at least one of DCI, MAC-CE or RRC signaling.

[0162] Aspect 12: A method for wireless communication performed by a network node, the method comprising: determining one or more DMRS scrambling sequences using a low PAPR sequence generator, wherein each of the one or more DMRS scrambling sequences corresponds to a corresponding port among one or more ports, the one or more ports being associated with downlink MIMO communication, wherein the downlink MIMO communication is based on DFT-s-OFDM; and transmitting the downlink MIMO communication including DMRS according to an in-slot DMRS mode, wherein the in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one DMRS scrambling sequence among the one or more DMRS scrambling sequences.

[0163] Aspect 13: According to the method of aspect 12, wherein the in-slot DMRS mode indicates that a symbol in one or more time-domain multiplexed symbols is at least partially assigned a single DMRS scrambling sequence from the one or more DMRS scrambling sequences.

[0164] Aspect 14: The method according to any one of Aspects 12 to 13, wherein the intra-slot DMRS mode indicates that the symbols in the one or more time-domain multiplexed symbols are fully allocated with a single DMRS scrambling sequence in the one or more DMRS scrambling sequences.

[0165] Aspect 15: The method according to any one of Aspects 12 to 14, wherein the intra-slot DMRS mode indicates that a symbol in one or more time-domain multiplexed symbols is at least partially assigned a first DMRS scrambling sequence in one or more DMRS scrambling sequences, and at least partially assigned a second DMRS scrambling sequence in one or more DMRS scrambling sequences.

[0166] Aspect 16: The method according to any one of Aspects 12 to 15, wherein the low PAPR sequence generator is a Zadoff-Chu sequence generator.

[0167] Aspect 17: The method according to any one of Aspects 12 to 16, wherein the downlink MIMO communication is transmitted at a frequency greater than about 52 GHz.

[0168] Aspect 18: The method according to any one of aspects 12 to 17, the method further comprising: transmitting a configuration indicating the DMRS mode within the time slot.

[0169] Aspect 19: The method according to aspect 18, wherein the configuration is sent via at least one of DCI, MAC-CE or RRC signaling.

[0170] Aspect 20: The method according to any one of Aspects 18 to 19, the method further comprising: transmitting the configuration at least in part based on determining that the characteristics of the channel associated with the downlink MIMO communication satisfy a threshold.

[0171] Aspect 21: The method according to any one of Aspects 12 to 20, wherein the DMRS is transmitted according to an inter-slot DMRS mode, the inter-slot DMRS mode indicating one or more time slots in a plurality of time slots of the downlink MIMO communication in which the DMRS is to be transmitted.

[0172] Aspect 22: According to the method of aspect 21, the method further includes: sending a configuration indicating the inter-slot DMRS mode.

[0173] Aspect 23: The method according to aspect 22, wherein the configuration is sent via at least one of DCI, MAC-CE or RRC signaling.

[0174] Aspect 24: The method according to any one of Aspects 22 to 23, the method further comprising: transmitting the configuration at least in part based on determining that the characteristics of the channel associated with the downlink MIMO communication satisfy a threshold.

[0175] Aspect 25: An apparatus for wireless communication at a device, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to one or more of aspects 1 to 11.

[0176] Aspect 26: A device for wireless communication, the device including a memory; and one or more processors coupled to the memory, the one or more processors being configured to perform the method according to one or more of aspects 1 to 11.

[0177] Aspect 27: An apparatus for wireless communication, the apparatus comprising at least one component for performing the method according to one or more of aspects 1 to 11.

[0178] Aspect 28: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform the method according to one or more of aspects 1 to 11.

[0179] Aspect 29: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method according to one or more of aspects 1 to 11.

[0180] Aspect 30: An apparatus for wireless communication at a device, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to one or more of aspects 12 to 24.

[0181] Aspect 31: A device for wireless communication, the device including a memory; and one or more processors coupled to the memory, the one or more processors being configured to perform the method according to one or more of aspects 12 to 24.

[0182] Aspect 32: An apparatus for wireless communication, the apparatus comprising at least one component for performing the method according to one or more of aspects 12 to 24.

[0183] Aspect 33: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform the method according to one or more of aspects 12 to 24.

[0184] Aspect 34: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method according to one or more of aspects 12 to 24.

[0185] While the foregoing disclosure provides examples and descriptions, it is not intended to be exhaustive or to limit aspects to the precise forms disclosed. Modifications and variations may be made based on the foregoing disclosure, or from practice of these aspects.

[0186] As used herein, the term "component" is intended to be interpreted broadly as hardware and / or a combination of hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, "software" should be interpreted broadly as meaning instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, running threads, procedures, and / or functions, etc. As used herein, a "processor" is implemented in hardware and / or a combination of hardware and software. It will be clear that the systems and / or methods described herein can be implemented in various forms of hardware and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods is not limited in any way. Therefore, the operation and behavior of systems and / or methods are not described herein with reference to specific software code, as those skilled in the art will understand that software and hardware can be designed, at least in part, based on the descriptions herein, to implement the systems and / or methods.

[0187] As used in this article, depending on the context, "meeting the threshold" can mean a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0188] Although specific combinations of features are set forth in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the aspects. Many of these features may be combined in ways not specifically set forth in the claims and / or not disclosed in the specification. The disclosure of the aspects includes each dependent claim in combination with each other claim in the claim set. As used herein, the phrase referring to “at least one of” the list of entries means any combination of these entries (including a single member). As an example, “at least one of a, b, or c” is intended to cover a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination with multiple of the same element (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c, or any other ordering of a, b, and c).

[0189] No element, action, or instruction used herein should be construed as critical or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and are interchangeable with “one or more.” Additionally, as used herein, the article “described” is intended to include one or more entries mentioned in connection with the article “described” and is interchangeable with “one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items and are interchangeable with “one or more.” If only one item is desired, the phrase “only one” or similar terminology is used. Moreover, as used herein, the terms “have,” “have,” etc., are intended to be open-ended terms that do not limit the elements they modify (e.g., an element “having” A may also have B). Additionally, the phrase “based on” is intended to mean “at least partially based on” unless otherwise explicitly stated. Moreover, as used herein, the term “or” is intended to be open-ended when used in a series and is interchangeable with “and / or” unless otherwise explicitly stated (e.g., if used in conjunction with “any” or “only one”).

Claims

1. A user equipment (UE) for wireless communication, the user equipment (UE) comprising: Memory; and One or more processors, said one or more processors being coupled to the memory and configured to: A low peak-to-average power ratio (PAPR) sequence generator is used to determine one or more demodulation reference signal (DMRS) scrambling sequences. Each of the one or more DMRS scrambling sequences corresponds to a corresponding port in one or more ports, which are associated with downlink multiple-input multiple-output (MIMO) communication. The downlink MIMO communication mentioned above is based on Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM); and The downlink MIMO communication, including DMRS, is received according to the DMRS mode within the time slot. The in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences.

2. The UE according to claim 1, wherein the in-slot DMRS mode indicates that a symbol in one or more time-domain multiplexed symbols is partially allocated a single DMRS scrambling sequence from the one or more DMRS scrambling sequences.

3. The UE according to claim 1, wherein the in-slot DMRS mode indicates that the symbols in the one or more time-domain multiplexed symbols are fully allocated with a single DMRS scrambling sequence in the one or more DMRS scrambling sequences.

4. The UE according to claim 1, wherein the in-slot DMRS mode indicates that the symbols in the one or more time-domain multiplexed symbols are at least partially allocated with a first DMRS scrambling sequence in the one or more DMRS scrambling sequences, and at least partially allocated with a second DMRS scrambling sequence in the one or more DMRS scrambling sequences.

5. The UE according to claim 1, wherein the low PAPR sequence generator is a Zadoff-Chu sequence generator.

6. The UE of claim 1, wherein the downlink MIMO communication is received at a frequency of approximately 52 GHz or higher.

7. The UE of claim 1, wherein the one or more processors are further configured to receive a configuration indicating the DMRS mode within the time slot.

8. The UE of claim 7, wherein the configuration is received via at least one of downlink control information (DCI), media access control (MAC) control element (CE), or radio resource control (RRC) signaling.

9. The UE of claim 1, wherein the DMRS is received according to an inter-slot DMRS mode, the inter-slot DMRS mode indicating one or more time slots in which the DMRS is to be received among a plurality of time slots of the downlink MIMO communication.

10. The UE of claim 9, wherein the one or more processors are further configured to receive a configuration indicating the inter-slot DMRS mode.

11. The UE of claim 10, wherein the configuration is received via at least one of downlink control information (DCI), media access control (MAC) control element (CE), or radio resource control (RRC) signaling.

12. A network node for wireless communication, the network node comprising: Memory; and One or more processors, said one or more processors being coupled to the memory and configured to: A low peak-to-average power ratio (PAPR) sequence generator is used to determine one or more demodulation reference signal (DMRS) scrambling sequences. Each of the one or more DMRS scrambling sequences corresponds to a corresponding port in one or more ports, which are associated with downlink multiple-input multiple-output (MIMO) communication. The downlink MIMO communication mentioned above is based on Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM); and The downlink MIMO communication, including DMRS, is transmitted according to the DMRS mode within the time slot. The in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences.

13. The network node of claim 12, wherein the in-slot DMRS mode indicates that a symbol in the one or more time-domain multiplexed symbols is at least partially assigned a single DMRS scrambling sequence from the one or more DMRS scrambling sequences.

14. The network node of claim 12, wherein the in-slot DMRS mode indicates that the symbols in the one or more time-domain multiplexed symbols are fully allocated with a single DMRS scrambling sequence from the one or more DMRS scrambling sequences.

15. The network node of claim 12, wherein the in-slot DMRS mode indicates that the symbols in the one or more time-domain multiplexed symbols are at least partially assigned a first DMRS scrambling sequence of the one or more DMRS scrambling sequences, and at least partially assigned a second DMRS scrambling sequence of the one or more DMRS scrambling sequences.

16. The network node of claim 12, wherein the low PAPR sequence generator is a Zadoff-Chu sequence generator.

17. The network node of claim 12, wherein the downlink MIMO communication is transmitted at a frequency of approximately 52 GHz or higher.

18. The network node of claim 12, wherein the one or more processors are further configured to transmit a configuration indicating the DMRS mode within the time slot.

19. The network node of claim 18, wherein the configuration is transmitted via at least one of downlink control information (DCI), media access control (MAC) control element (CE), or radio resource control (RRC) signaling.

20. The network node of claim 18, wherein the one or more processors are further configured to transmit the configuration at least in part based on determining that the characteristics of the channel associated with the downlink MIMO communication satisfy a threshold.

21. The network node of claim 12, wherein the DMRS is transmitted according to an inter-slot DMRS mode, the inter-slot DMRS mode indicating one or more time slots in a plurality of time slots of the downlink MIMO communication in which the DMRS is to be transmitted.

22. The network node of claim 21, wherein the one or more processors are further configured to transmit a configuration indicating the inter-slot DMRS mode.

23. The network node of claim 22, wherein the configuration is transmitted via at least one of downlink control information (DCI), media access control (MAC) control element (CE), or radio resource control (RRC) signaling.

24. The network node of claim 22, wherein the one or more processors are further configured to transmit the configuration at least in part based on determining that the characteristics of the channel associated with the downlink MIMO communication satisfy a threshold.

25. A method for wireless communication performed by a user equipment (UE), the method comprising: A low peak-to-average power ratio (PAPR) sequence generator is used to determine one or more demodulation reference signal (DMRS) scrambling sequences. Each of the one or more DMRS scrambling sequences corresponds to a corresponding port in one or more ports, which are associated with downlink multiple-input multiple-output (MIMO) communication. The downlink MIMO communication mentioned above is based on Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM); and The downlink MIMO communication, including DMRS, is received according to the DMRS mode within the time slot. The in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences.

26. The method of claim 25, wherein the in-slot DMRS mode indicates that a symbol in one or more time-domain multiplexed symbols is partially assigned a single DMRS scrambling sequence from the one or more DMRS scrambling sequences.

27. The method of claim 25, wherein the in-slot DMRS mode indicates that the symbols in the one or more time-domain multiplexed symbols are fully allocated with a single DMRS scrambling sequence from the one or more DMRS scrambling sequences.

28. A method for wireless communication performed by a network node, the method comprising: A low peak-to-average power ratio (PAPR) sequence generator is used to determine one or more demodulation reference signal (DMRS) scrambling sequences. Each of the one or more DMRS scrambling sequences corresponds to a corresponding port in one or more ports, which are associated with downlink multiple-input multiple-output (MIMO) communication. The downlink MIMO communication mentioned above is based on Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM); and The downlink MIMO communication, including DMRS, is transmitted according to the DMRS mode within the time slot. The in-slot DMRS mode indicates one or more time-domain multiplexed symbols, each of the one or more time-domain multiplexed symbols being at least partially assigned at least one of the one or more DMRS scrambling sequences.

29. The method of claim 28, wherein the in-slot DMRS mode indicates that a symbol in the one or more time-domain multiplexed symbols is at least partially assigned a single DMRS scrambling sequence from the one or more DMRS scrambling sequences.

30. The method of claim 28, wherein the in-slot DMRS mode indicates that a symbol in one or more time-domain multiplexed symbols is fully allocated a single DMRS scrambling sequence in one or more DMRS scrambling sequences.

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