Phase tracking reference signal design for single carrier waveform with multiple data layers

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may send information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication to a base station. The UE may receive a phase tracking reference signal (PTRS) configuration for multiple layers from the base station based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration. The UE may perform single carrier communication according to the PTRS configuration.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to the following applications: U.S. Provisional Patent Application No. 62 / 705,852, filed on July 17, 2020, entitled “PHASETRACKING REFERENCE SIGNAL DESIGN FOR SINGLE-CARRIER WAVEFORM WITH MULTIPLEDATA LAYERS”; and U.S. Non-Provisional Patent Application No. 17 / 305,426, filed on July 7, 2021, entitled “PHASE TRACKING REFERENCE SIGNAL DESIGN FOR SINGLE-CARRIER WAVEFORM WITH MULTIPLE DATALAYERS”, which are expressly incorporated herein by reference. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for phase tracking reference signal (PTRS) design for a single carrier waveform with multiple data layers. Background Art

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may 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 set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard released by the Third Generation Partnership Project (3GPP).

[0005] A wireless network may include a number of base stations (BSs) that can support communications for a number of user equipments (UEs). The UEs may communicate with the BSs via downlinks and uplinks. A "downlink" (or "forward link") refers to a communication link from a BS to a UE, and an "uplink" (or "reverse link") refers to a communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, etc.

[0006] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user devices to communicate at the city, country, region, and even global level. NR (which may also be referred to as 5G) is an enhancement set to the LTE mobile standard released by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also referred to as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL) to better integrate with other open standards, and support beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation. As the demand for mobile broadband access continues to grow, further improvements to LTE, NR and other radio access technologies remain useful. Summary of the invention

[0007] In some aspects, a method of wireless communication performed by a UE includes: sending information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication to a base station; receiving a phase tracking reference signal (PTRS) configuration for multiple layers from the base station based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration; and performing single carrier communication according to the PTRS configuration.

[0008] In some aspects, a method of wireless communication performed by a base station includes: receiving information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication from a UE; sending a PTRS configuration for multiple layers to the UE based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration; and performing single carrier communication according to the PTRS configuration.

[0009] In some aspects, a UE for wireless communication includes: a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to: send information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication to a base station; receive a PTRS configuration for multiple layers from the base station based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration; and perform single carrier communication according to the PTRS configuration.

[0010] In some aspects, a base station for wireless communication includes: a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to: receive information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication from a UE; send a PTRS configuration for multiple layers to the UE based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration; and perform single carrier communication according to the PTRS configuration.

[0011] In some aspects, a non-transitory computer-readable medium storing one or more instructions for wireless communication includes: one or more instructions that, when executed by one or more processors of a UE, cause the one or more processors to: send information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication to a base station; receive a PTRS configuration for multiple layers from the base station based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration; and perform single carrier communication according to the PTRS configuration.

[0012] In some aspects, a non-transitory computer-readable medium storing one or more instructions for wireless communication includes: one or more instructions that, when executed by one or more processors of a base station, cause the one or more processors to: receive information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication from a UE; send a PTRS configuration for multiple layers to the UE based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration; and perform single carrier communication according to the PTRS configuration.

[0013] In some aspects, an apparatus for wireless communication includes: a unit for sending information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication to a base station; a unit for receiving a PTRS configuration for multiple layers from the base station based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration; and a unit for performing single carrier communication according to the PTRS configuration.

[0014] In some aspects, an apparatus for wireless communication includes: a unit for receiving information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers for single carrier communication from a UE; a unit for sending a PTRS configuration for multiple layers to the UE based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration; and a unit for performing single carrier communication according to the PTRS configuration.

[0015] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as fully described herein with reference to and as illustrated by the accompanying drawings and description.

[0016] The foregoing has been fairly broadly outlined according to the features and technical advantages of the examples of the present disclosure, so that the following specific embodiments may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be easily utilized as a basis for modifying or designing other structures for the same purpose of achieving the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein (both their organization and method of operation) together with the associated advantages will be better understood according to the description below. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description, and is not intended to limit the limits of the claims.

[0017] Although various aspects are described in the present disclosure by way of illustration of some examples, it will be understood by those skilled in the art that such aspects can be implemented in many different arrangements and scenarios. The technology described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or packaging arrangements. For example, some aspects can be implemented via integrated chip embodiments and other devices based on non-module components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchase equipment, medical devices, or devices that enable artificial intelligence). Various aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, or system-level components. The device incorporating the described aspects and features may include additional components and features for the implementation and implementation of the claimed and described aspects. For example, the transmission and reception of wireless signals may include a number of components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders, or summers). It is intended that the various aspects described herein may be implemented in a wide variety of devices, components, systems, distributed arrangements, or end-user devices of different sizes, shapes, and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to fully understand the above features of the present disclosure, a more specific description of the invention briefly summarized above can be obtained by referring to various aspects (some of which are shown in the accompanying drawings). However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and are therefore not to be considered as limiting the scope thereof, because the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0019] Figure 1 is a schematic diagram illustrating an example of a wireless network according to the present disclosure.

[0020] Figure 2 is a schematic diagram showing an example of communication between a base station and a UE in a wireless network according to the present disclosure.

[0021] Figure 3 is a schematic diagram showing an example of discrete Fourier transform-spread orthogonal frequency division multiplexing (DFT-s-OFDM) incorporating a phase tracking reference signal according to the present disclosure.

[0022] Figure 4 is a schematic diagram illustrating examples of transmission configurations with and without power amplifier (PA) sharing in accordance with the present disclosure.

[0023] Figure 5 is a diagram illustrating an example of signaling associated with a phase tracking reference signal (PTRS) configuration based at least in part on a PA sharing configuration and a phase noise sharing configuration in accordance with the present disclosure.

[0024] Figure 6-Figure 9 is a schematic diagram showing an example of a PTRS configuration for multi-layer single-carrier communication according to the present disclosure.

[0025] Fig.10 and Fig.11 is a diagram illustrating example processes associated with PTRS configuration for multi-layer communications according to the present disclosure. DETAILED DESCRIPTION

[0026] Various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms, and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. Instead, these aspects are provided so that the present disclosure will be thorough and complete, and the scope of the present disclosure will be fully conveyed to those skilled in the art. Based on the teachings herein, it should be understood by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is implemented independently of any other aspect of the present disclosure or implemented in combination with any other aspect of the present disclosure. For example, using any number of aspects set forth herein, a device can be implemented or a method can be implemented. In addition, the scope of the present disclosure is intended to cover such a device or method implemented using other structures, functions, or structures and functions other than the various aspects of the present disclosure set forth herein or different from the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be embodied by one or more elements of the claims.

[0027] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements") and illustrated in the accompanying drawings. These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0028] It should be noted that while various aspects may be described herein using terminology generally associated with 5G or NR radio access technologies (RATs), various aspects of the present disclosure may be applied to other RATs, such as 3G RATs, 4G RATs, and / or post-5G RATs (e.g., 6G).

[0029] Figure 11 is a schematic diagram showing an example of a wireless network 100 according to the present disclosure. The wireless network 100 may be or may include elements of a 5G (NR) network and / or an LTE network, as well as other examples. The wireless network 100 may include a number of base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving this coverage area, depending on the context in which the term is used.

[0030] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown in , BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably herein.

[0031] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces (such as direct physical connections or virtual networks) using any suitable transport network.

[0032] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that is capable of relaying transmissions for other UEs. Figure 1 In the example shown in FIG. 1 , a relay BS 110 d may communicate with a macro BS 110 a and a UE 120 d to facilitate communication between the BS 110 a and the UE 120 d. A relay BS may also be referred to as a relay station, a relay base station, a relay, or the like.

[0033] The wireless network 100 may be a heterogeneous network including different types of BSs, such as a macro BS, a pico BS, a femto BS, a relay BS, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0034] The network controller 130 may be coupled to a set of BSs and may provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate directly or indirectly with each other via a wireless or wired backhaul.

[0035] UE 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE can be a cellular phone (e.g., a smart phone), 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 device, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or apparatus, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), an entertainment device (e.g., a music or video device, or a satellite radio unit, etc.), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0036] Some UEs may be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors and / or location tags, which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide a connection to a network (e.g., a wide area network such as the Internet or a cellular network) or a connection to the network, for example, via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as customer premises equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120 (such as a processor component and / or a memory component). In some aspects, a processor component and a memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operationally coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0037] Typically, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific RAT and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0038] In some aspects, 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 base station 110 as an intermediary 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) protocol (e.g., which may include vehicle-to-vehicle (V2V) protocol, vehicle-to-infrastructure (V2I) protocol, etc.) and / or mesh network. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0039] Devices of the wireless network 100 may communicate using an electromagnetic spectrum, which may be subdivided into various categories, bands, channels, etc. based on frequency or wavelength. For example, devices of the wireless network 100 may communicate using an operating band having a first frequency range (FR1) (which may span from 410 MHz to 7.125 GHz), and / or may communicate using an operating band having a second frequency range (FR2) (which may span from 24.25 GHz to 52.6 GHz). Frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as a "sub-6 GHz" band. Similarly, FR2 is often referred to as a "millimeter wave" band, although different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified by the International Telecommunication Union (ITU) as a "millimeter wave" band. Thus, unless expressly stated otherwise, it should be understood that the term “sub-6 GHz”, etc., if used herein, may broadly refer to frequencies less than 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless expressly stated otherwise, it should be understood that the term “millimeter wave”, etc., if used herein, may broadly refer to frequencies within the EHF band, frequencies within FR2, and / or mid-band frequencies (e.g., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 may be modified, and that the techniques described herein are applicable to those modified frequency ranges.

[0040] As pointed out above, Figure 1 is provided as an example. Other examples may differ from those described above. Figure 1 Examples described.

[0041] Figure 2 1 is a diagram illustrating an example of base station 110 communicating with UE 120 in wireless network 100 according to the present disclosure. Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general, T≥1 and R≥1.

[0042] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for the UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. The transmit processor 220 may also 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. The transmit processor 220 may also 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 signals (PSS) or secondary synchronization signals (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide T output symbol streams to T modulators (MOD) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.

[0043] At the UE 120, antennas 252a to 252r may receive downlink signals from the base station 110 and / or other base stations, and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM) to obtain received symbols. The MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. The receive processor 258 may 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 information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a channel quality indicator (CQI) parameter, among other examples. In some aspects, one or more components of UE 120 may be included in housing 284.

[0044] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0045] Antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or may be included in one or more antenna panels, antenna groups, antenna element sets, and / or antenna arrays, among other examples. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include one or more antenna elements. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include coplanar antenna element sets and / or non-coplanar antenna element sets. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include antenna elements within a single housing and / or antenna elements within multiple housings. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include antenna elements coupled to one or more transmitting and / or receiving components (such as Figure 2 One or more antenna elements of one or more components).

[0046] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI) from a controller / processor 280. The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 (if applicable), further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 254) of the UE 120 may be included in a modem of the UE 120. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antennas 252, modulators and / or demodulators 254, MIMO detectors 256, receive processors 258, transmit processors 264, and / or TX MIMO processors 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, for example, as described with reference to Figure 3-Figure 11 Described.

[0047] At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 to schedule the UE 120 for downlink and / or uplink communications. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of the base station 110 may be included in a modem of the base station 110. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antennas 234, modulators and / or demodulators 232, MIMO detectors 236, receive processors 238, transmit processors 220, and / or TX MIMO processors 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, for example, as described with reference to Figure 3-Figure 11 Described.

[0048] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other components in the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component in may perform or direct e.g. Fig.10 The process of 1000 Fig.11 1100 and / or operations of other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, one or more instructions, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly, or after compilation, conversion and / or interpretation), may cause one or more processors, UE 120 and / or base station 110 to perform or instruct, for example, Fig.10 The process of 1000 Fig.11 The process 1100 and / or operations of other processes as described herein. In some aspects, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, among other examples.

[0049] In some aspects, UE 120 may include means for sending information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication to a base station; means for receiving a PTRS configuration for multiple layers from the base station based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration; means for performing single carrier communication according to the PTRS configuration; etc. In some aspects, such means may include combining Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0050] In some aspects, the base station 110 may include means for receiving information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication from a UE; means for sending a PTRS configuration for multiple layers to the UE based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration; means for performing single carrier communication according to the PTRS configuration; etc. In some aspects, such means may include combining Figure 2 One or more components of base station 110 are depicted, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and the like.

[0051] Although Figure 2 The blocks in the 200 and 210 are shown as different components, but the functions described above with respect to the blocks 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 the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0052] As pointed out above, Figure 2 is provided as an example. Other examples may differ from those described above. Figure 2 Examples described.

[0053] Some communication systems may use a single carrier (SC) waveform to reduce the peak-to-average power ratio (PAPR), which reduces the power amplifier (PA) back-off required for transmission of the waveform. Lower PA back-off results in improved transmission performance and improved utilization of the transmit power budget. Examples of SC waveforms include DFT-s-OFDM waveforms and SC quadrature amplitude modulation (SC-QAM) waveforms.

[0054] Some radio access technologies (such as 5G / NR) prepare for communications in frequency ranges above the 6 GHz range (such as millimeter wave frequencies, etc.). Communications in higher frequency ranges may involve challenges that do not exist or are less important for communications in lower ranges. For example, communications in higher frequency ranges may involve more phase noise than communications in lower frequency ranges because the power of phase noise may increase with the carrier frequency of the communication due to oscillator jitter, carrier frequency mismatch, etc. Phase noise may introduce phase drift in communication symbols. In order to mitigate phase drift, the transmitter may insert a phase tracking reference signal (PTRS) in the communication so that the phase error trajectory of the communication can be tracked over time. The PTRS may include a pilot signal inserted in the middle of the data symbol. The receiver may estimate the phase error (e.g., phase drift) based at least in part on the PTRS, and may apply phase compensation to the received signal to mitigate the estimated phase error. The PTRS may be sent in a chunk including one or more PTRS.

[0055] As another example of challenges associated with higher frequency ranges, a PA (e.g., a PA of a UE or base station) may have lower efficiency in a higher frequency range than in a lower frequency range. For example, a PA may have lower efficiency in frequency range 4 (FR4) (e.g., above 114 GHz) than in FR2.

[0056] Some RATs (such as 5G / NR) also provide for multi-layer communications, in which a signal carries multiple data layers corresponding to multiple data ports. Some transmitters may use a shared PA configuration for multi-layer communications, in which a set of PAs jointly provides amplification of the transmitted signal. Other transmitters may not use a PA sharing configuration for multi-layer communications. In addition, in some cases, phase noise may be shared between communicating layers (e.g., due to phase coherence of the layers, shared oscillators of the layers, Doppler effects common to the layers, etc.), while in other cases, phase noise may not be shared or may be independent for different layers. Therefore, in some cases, communicating layers may be associated with the same phase drift, while in other cases, communicating layers may be associated with different phase drifts.

[0057] Because phase noise sharing configurations and PA sharing configurations may be different for different multi-layer communications, a one-size-fits-all approach (in which the same PTRS configuration is used for all multi-layer single-carrier communications) may be suboptimal. For example, if PTRS is configured in two layers of a two-layer single-carrier communication, and the layers share phase noise (e.g., are phase-coherent with each other), the resources of the two layers may be wasted because a single PTRS will be sufficient to determine the phase error of the two phase-coherent layers. As another example, the PTRS configuration may vary based at least in part on whether a PA set is shared between two or more layers. If the PA set is shared, a power boost may be applied to a PTRS transmitted on only one layer, while if the PA set is not shared, a single-layer PTRS may not be able to use a power boost. These challenges may cause the PTRS configuration to be overly conservative and involve more resource overhead than is required to determine the phase error of each layer, or not provide sufficient information to determine the phase error of each layer.

[0058] Some techniques and devices described herein provide PTRS configurations based at least in part on phase noise sharing configurations and PA sharing configurations for multi-layer communications. For example, a PTRS configuration may indicate whether PTRS is to be transmitted concurrently on multiple layers, or one or more zero power (ZP) PTRS configurations are on one layer, while non-zero power (NZP) PTRS are transmitted on another layer. As another example, a PTRS configuration may indicate whether a power boost is to be applied to a PTRS for multi-layer communications based at least in part on a PA sharing configuration associated with multi-layer communications. In some aspects, the PTRS may be inserted at different time positions within symbols in two or more layers. Some techniques and devices described herein also provide signaling associated with the configuration of PTRS, such as signaling of PA sharing capabilities and / or phase noise sharing capabilities, signaling of preferred PTRS waveforms, signaling of PTRS configurations, and the like. In this way, a PTRS configuration suitable for the PA sharing configuration and / or phase noise sharing configuration of the UE may be applied, thereby improving resource utilization and phase error measurement for multi-layer single-carrier communications.

[0059] Figure 3300 is a schematic diagram illustrating an example of discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) incorporating a phase tracking reference signal in accordance with various aspects of the present disclosure. DFT-s-OFDM is an example of a single-carrier waveform that can provide improved PAPR relative to multi-carrier waveforms (such as traditional OFDM without DFT spreading). Operations performed by a transmitter (e.g., UE 120, BS 110, etc.) are illustrated by reference numeral 302, and operations performed by a receiver (e.g., UE 120, BS 110, etc.) are illustrated by reference numeral 304. The operations described in conjunction with example 300 may be performed by a processor of UE 120, such as controller / processor 280 (e.g., baseband processor), etc.

[0060] As shown by reference number 306, the transmitter can insert one or more PTRS into the time domain data stream 308. PTRS can be associated with PTRS configuration. PTRS configuration can indicate the block size and block number and other items associated with PTRS. For example, the block size can indicate how many PTRS are included in the block (e.g., the number of pilot reference signals), and the block number can indicate how many blocks are included in the symbol. The block includes one or more PTRS, and the block of PTRS is inserted into the data stream to generate a signal including PTRS. The block can also be referred to as a PTRS group. The PTRS configuration can also indicate the mode for PTRS insertion. Two examples of the mode for PTRS insertion are head-tail mode and non-head-tail mode. In the non-head-tail mode, PTRS is uniformly inserted (e.g., every two data segments of a symbol, every four data segments of a symbol, etc.). In the head-tail mode, PTRS can be inserted at the beginning of the symbol (e.g., between the cyclic prefix and the first data segment of the symbol), at the end of the symbol and / or at one or more intermediate positions. In some aspects, the PTRS configuration may indicate a sequence for the PTRS, a waveform for the PTRS, and the like.

[0061] The transmitter may parallelize the time domain data stream and the PTRS, and the transmitter may perform DFT spreading on the parallelized data stream, as shown by reference number 310. After performing the DFT spreading, the transmitter may map the DFT spread data to subcarriers for transmission, as shown by reference number 312, and may perform an inverse fast Fourier transform (IFFT), as shown by reference number 314. Thus, the transmitter may generate a single carrier DFT-s-OFDM waveform. As further shown, the transmitter may perform serialization (P / S), add a cyclic prefix (+CP), and may convert the digital baseband signal to an analog signal for radio transmission (digital-to-analog conversion (DAC) to radio frequency (RF)). The transmitter may send a signal to a receiver.

[0062] The receiver may generate a digital signal (e.g., analog-to-digital conversion (ADC) and RF) from a received radio frequency signal, remove a cyclic prefix (-CP), and parallelize the digital signal. The receiver may perform a fast Fourier transform (FFT) on the parallelized signal, as shown by reference number 316, and may perform subcarrier demapping (also known as frequency domain equalization) to extract data from the frequency domain signal, as shown by reference number 318. The receiver may perform an inverse DFT (IDFT) extension, as shown by reference number 320, to generate a parallelized data stream, and may perform serialization of the parallelized data stream to generate a demodulated time domain data stream. As shown by reference number 322, the receiver may detect a PTRS in the demodulated data stream. The receiver may calculate one or more phase errors for the demodulated data stream, as shown by reference number 324. As shown by reference number 326, the receiver may perform phase correction based at least in part on the phase error to generate a phase-corrected baseband signal. The receiver may perform detection to detect the data symbols of the phase corrected baseband symbols, as indicated by reference numeral 328. Thus, PTRS may be used to perform phase error detection and correction for single layer communications.

[0063] Another form of a single carrier waveform is an SC-QAM waveform. SC-QAM does not involve DFT at the transmitter or IDFT at the receiver, and is therefore not as computationally complex as DFT-s-OFDM. The reduced computational complexity of SC-QAM may be useful at higher frequencies and larger bandwidths. In order to generate an SC-QAM waveform, the transmitter may insert a PTRS into the data stream, perform pulse shaping, and add a cyclic prefix, and then may send the resulting SC-QAM signal. The receiver may receive the SC-QAM waveform, remove the cyclic prefix, perform matched filtering, perform time domain equalization (e.g., using a time domain filter derived from a frequency domain minimum mean square error algorithm), and may apply a PTRS reception algorithm to detect the inserted PTRS, determine the phase error, and apply phase correction to offset the phase error.

[0064] PTRS detection for SC-QAM may be performed on a full symbol basis or on a per-sample basis. On a full symbol basis, the receiver may identify all PTRS samples in a symbol, and may then determine a phase error and apply a phase correction based at least in part on the determined phase error. On a per-sample basis, the receiver may iteratively process samples of a symbol to identify a PTRS, may perform causal estimation based at least in part on the iteratively identified PTRS, and may perform phase correction based at least in part on the causal estimation.

[0065] As pointed out above, Figure 3is provided as an example. Other examples may differ from those described above. Figure 3 Examples described.

[0066] Figure 4 4 is a schematic diagram showing an example 400 of a transmission configuration with and without power amplifier (PA) sharing according to the present disclosure. Figure 4 The top of the figure shows the transmission configuration without PA sharing. Figure 4 400. The radio frequency (RF) chain of the transmitter may include one or more PAs 405. The one or more PAs 405 may amplify signals received via one or more respective antenna ports 410 for transmission by the transmitter. The set of antenna ports 410 may be mapped to a set of data ports 415. The data ports 415 may correspond to layers of multi-layer communications. Thus, in example 400, both transmission configurations include two data layers.

[0067] The data ports 415 may be mapped to the antenna ports 410 based at least in part on a precoding matrix. An example of a precoding matrix using PA sharing is shown by reference number 420, and an example of a precoding matrix without PA sharing is shown by reference number 425. The precoding matrix shown by reference number 420 maps each of the data ports 415-1 and 415-2 to respective antenna ports 410-1 and 410-2. If the data stream from the data port 415-1 does not include data at a given sample, the data stream from the data port 415-2 may be power-boosted at the given sample so that the total transmission power of the set of antenna ports 410 is unchanged. Therefore, power may be shared between the data ports 415-1 and 415-2 when PA sharing is enabled.

[0068] The data ports 415-3 and 415-4 are mapped to respective single antenna ports 410-3 and 410-4 by the precoding matrix shown as reference numeral 425. Therefore, if the data stream from data port 415-3 does not include data at a given sample, the transmit power from data port 415-4 cannot be boosted in the given sample because the data ports 415-3 and 415-4 are associated with separate antenna ports 410 and, therefore, separate PAs 405.

[0069] As pointed out above, Figure 4 is provided as an example. Other examples may differ from those described above. Figure 4 Examples described.

[0070] Figure 5is a schematic diagram illustrating an example 500 of signaling associated with a PTRS configuration based at least in part on a PA sharing configuration and a phase noise sharing configuration according to the present disclosure. As shown, the example 500 includes a UE 120 and a BS 110. The example 500 relates to single carrier communications between the UE 120 and the BS 110, for example, using a DFT-s-OFDM waveform or an SC-FDM waveform. The single carrier communications may include uplink communications and / or downlink communications.

[0071] As shown, UE 120 may send information 510 to BS 110. Information 510 may indicate a phase noise sharing configuration for a single carrier communication including multiple layers and / or a PA sharing configuration for a single carrier communication. For example, UE 120 may report whether a data layer of a single carrier communication shares phase noise and / or a PA set. In some aspects, information 510 may include information indicating a PTRS waveform (such as a preferred PTRS waveform). For example, information 510 may indicate a preferred number of layers for a single carrier communication including PTRS, a number of PTRS to be provided in a given layer within a symbol, a number of blocks to be provided in a given layer within a symbol in a given layer, a number of PTRS per block, and the like. In some aspects, information indicating a PTRS waveform may indicate a phase noise sharing configuration and / or a PA sharing configuration. For example, a PTRS waveform selected by UE 120 may be associated with a specific phase noise sharing configuration and / or a PA sharing configuration, and thus information indicating a PTRS waveform may implicitly indicate a phase noise sharing configuration and / or a PA sharing configuration. Information 510 may include capability information, radio resource control signaling, and the like.

[0072] As shown by reference number 520, BS 110 may determine a PTRS configuration for a single carrier communication including multiple layers. For example, BS 110 may determine a PTRS configuration based at least in part on information 510. The PTRS configuration may indicate the location of a PTRS or a block (e.g., a ZP PTRS and / or an NZP PTRS), the number of data layers in which the PTRS is included, the number of blocks per symbol, the number of PTRS per block, the size of the ZP PTR, etc. For example, the PTRS configuration may indicate a PTRS waveform for single carrier communication. In some aspects, the PTRS configuration may indicate a power boost configuration. The power boost configuration may indicate whether the power boost is to be used for the NZP PTRS in a given layer. In some aspects, the PTRS configuration may indicate a cyclic shift for the PTRS. For example, the PTRS configuration may indicate the location of the NZP PTRS based at least in part on a non-head-to-tail pattern with a modified cyclic shift value relative to a non-head-to-tail pattern. In this case, BS 110 may signal information indicating the cyclic shift (e.g., as part of the PTRS configuration or separately from the PTRS configuration).

[0073] BS 110 may determine a PTRS configuration based at least on a phase noise sharing configuration and / or a PA sharing configuration. As a few general examples, if the phase noise sharing configuration indicates that phase noise is shared between data layers, BS 110 may determine a PTRS configuration in which PTRS is provided only on the first layer, thereby reducing PTRS overhead on the second layer. As another example, if the phase noise sharing configuration indicates that phase noise is not shared between layers, BS 110 may determine a PTRS configuration in which PTRS is provided on all layers. As yet another example, if the PA sharing configuration indicates that a PA set is not shared between layers, BS 110 may determine a PTRS configuration indicating that power boosting is not applied for NZP PTRS in a given layer, or a PTRS configuration indicating that PTRS will be inserted concurrently in all layers in order to increase the received power of the PTRS. As yet another example, if PA sharing indicates that a PA set is shared between layers, BS 110 may determine a PTRS configuration indicating that if an NZP PTRS in a first layer is concurrent with a ZP PTRS in a second layer, a power boost will be applied to the NZP PTRS. For a more detailed description of various PTRS configurations corresponding to a combination of a PA sharing configuration and a phase noise sharing configuration, refer to Figure 6-Figure 9 Description attached.

[0074] As shown, BS 110 may transmit information 530 indicating the PTRS configuration to UE 120. For example, BS 110 may transmit information 530 using radio resource control signaling, medium access control (MAC) signaling (e.g., MAC control element), downlink control information (DCI), and the like.

[0075] As shown by reference number 540, BS 110 and UE 120 can perform single carrier communication according to the PTRS configuration. For example, a sender of the single carrier communication (e.g., BS 110 or UE 120) can insert PTRS (e.g., ZP PTRS and / or NZP PTRS) in one or more layers of the single carrier communication. A receiver of the single carrier communication (e.g., UE 120 or BS 110) can detect PTRS based at least in part on the PTRS configuration, determine a phase error for the single carrier communication, and apply phase correction to offset the phase error. Therefore, PTRS can be inserted in a single carrier communication with multiple data layers, thereby improving the accuracy and reliability of multi-layer communication, and reducing the impact of phase drift on multi-layer communication. Therefore, higher frequency communication using multiple layers is improved.

[0076] As pointed out above, Figure 5 is provided as an example. Other examples may differ from those described above. Figure 5 Examples described.

[0077] Figure 6-Figure 9 are schematic diagrams illustrating examples 600 , 700 , 800 , and 900 of PTRS configurations for multi-layer single-carrier communications according to the present disclosure.

[0078] Figure 6 Example 600 shows a PTRS configuration that may be used if phase noise is shared (e.g., the phase noise sharing configuration indicates shared phase noise) and amplification is shared (e.g., the PA sharing configuration indicates that the PA set is shared across all data ports / layers of multi-layer communications). As shown in example 600 and by reference number 610, in this case, the NZP PTRS may be inserted in the first layer 620 to identify the phase error across all layers 620 and 630 because the phase noise is shared across all layers.

[0079] As further shown, the second layer 630 may include a ZP PTRS corresponding to the NZP PTRS of the first layer 620. For example, since PA sharing is enabled in the example 600, if the second layer does not include data at a given sample, the NZP PTRS of the first layer may be power-boosted at the given sample. Here, the ZP PTRS 640 corresponds to the NZP PTRS 650. For example, the ZP PTRS 640 includes the NZP PTRS 650 in the time domain. As further shown, the ZP PTRS 640 also includes a portion of the data surrounding the NZP PTRS 650 in the time domain. For example, the ZP PTRS 640 may have a larger block size than the NZP PTRS 650, which may reduce the impact of delay spread on the NZP PTRS 650. For example, the power of the PTRS may be boosted (e.g., by 3 decibels), which improves the performance of the PTRS.

[0080] Example 600 illustrates a non-head-to-tail mode, where PTRS are provided at uniform intervals. Here, PTRS 1 and 4 (referred to as PTRS in head-to-tail positions) are uniformly spaced in a cyclic manner with respect to data segments 1 and 5. In some aspects, PTRS may be positioned based at least in part on a circular shift (e.g., a cyclic shift).

[0081] Example 700 shows a PTRS configuration that can be used if a phase noise sharing configuration is shared and a PA set is not shared. In this case, in a first option 710, PTRS is provided in both layers 720 and 730 of the communication. In a second option 740, PTRS is provided only in the first layer 720. The first option 710 may involve more overhead than the second option 740, and may provide a higher receive power for the PTRS. The second option 740 may involve less inter-layer interference than the first option 710, at the expense of lower transmit power.

[0082] Figure 8Example 800 shows a PTRS configuration that can be used if phase noise is not shared and PA sets are not shared across all data layers (e.g., the phase noise sharing configuration indicates that phase noise is not shared, and the PA sharing configuration indicates that PA sets are not shared). Therefore, both layers 805 and 810 can include NZP PTRS because the phase error of one layer is not necessarily the same as the phase error of the other layer. The first option is shown by reference number 815. In the first option, the NZP PTRS 820 in the first layer 805 is configured at the same sample as the ZP PTRS 825 in the second layer 810, and the NZP PTRS 830 in the second layer 820 is configured at the same sample as the ZP PTRS 835 in the first layer 805. The first option can provide a more accurate phase error estimate within a block than the second option, but can provide fewer blocks in a given symbol. The second option is shown by reference number 840. In a second option, blocks of PTRS are provided in both layers 805 and 810 at a given sample, and the PTRS within the block are encoded using orthogonal cover coding (OCC), as shown by reference numeral 845. OCC can be applied at a per-PTRS granularity. For example, there may be 4 PTRS in the block shown by reference numeral 850, so an OCC of +-+- is applied. Thus, the PTRS blocks of the two layers can be distinguished from each other. The second option may provide more PTRS / block in a given symbol, and may involve more inter-layer interference within a given block.

[0083] Fig. 9 Example 900 shows a PTRS configuration that can be used if phase noise is not shared and the PA set is shared across two data layers. As in example 800, both layers 910 and 920 can include PTRS because the phase error of one layer is not necessarily used to determine the phase error of the other layer. In example 900, the NZP PTRS is configured in different samples of layers 910 and 920. The NZP PTRS in the first layer 910 is configured at the same sample as the ZP PTRS in the second layer 920, and the NZP PTRS in the second layer 920 is configured at the same sample as the ZP PTRS in the first layer 910. In addition, since PA sharing is enabled in example 900, the NZP PTRS can be configured with a power boost (e.g., 3dB, etc.), which improves the performance of the NZP PTRS. Although both layers 910 and 920 include the same number of NZP PTRSs as each other and the same number of ZP PTRSs as each other, in some aspects, different layers may include different numbers of NZP PTRSs and / or different numbers of ZP PTRSs.

[0084] In some aspects, the NZP PTRS on the first layer 910 and the second layer 920 may be transmitted simultaneously and may be encoded using the OCC at a given sample. In this case, the NZP PTRS may be transmitted without power boosting. In some aspects, the location of the NZP PTRS may be determined (e.g., derived) based at least in part on a non-head-to-tail pattern with a modified cyclic shift value (e.g., a modified cyclic offset value relative to a cyclic shift value of the non-head-to-tail pattern).

[0085] As pointed out above, Figure 6-Figure 9 is provided as an example. Other examples may differ from those described above. Figure 6-Figure 9 Examples described.

[0086] Fig.10 1 is a diagram illustrating an example process 1000 performed, for example, by a UE in accordance with the present disclosure. Example process 1000 is an example in which a UE (eg, UE 120, etc.) performs operations associated with a phase tracking reference signal (PTRS) design for a single carrier waveform with multiple data layers.

[0087] like Fig.10 As shown, in some aspects, process 1000 may include sending information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication to a base station (block 1010). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may send information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication to a base station, as described above.

[0088] like Fig.10 As further shown in FIG. 1 , in some aspects, process 1000 may include receiving a PTRS configuration for multiple layers from a base station based at least in part on at least one of a power amplifier sharing configuration or a phase noise sharing configuration (block 1020). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may receive a PTRS configuration for multiple layers from a base station based at least in part on at least one of a power amplifier sharing configuration or a phase noise sharing configuration, as described above.

[0089] like Fig.10As further shown in FIG. 1 , in some aspects, process 1000 may include performing single carrier communication in accordance with a PTRS configuration (block 1030). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may perform single carrier communication in accordance with a PTRS configuration, as described above.

[0090] Process 1000 may include additional aspects, such as any single aspect or any combination of the aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0091] In a first aspect, the PTRS configuration indicates that each of the plurality of layers will include one or more PTRSs.

[0092] In a second aspect, the one or more PTRSs include multiple PTRSs inserted at different times within a symbol.

[0093] In a third aspect, a PTRS of a first layer of the plurality of layers is temporally aligned with a PTRS of a second layer of the plurality of layers.

[0094] In a fourth aspect, the PTRS of the first layer and the PTRS of the second layer are encoded using orthogonal cover codes.

[0095] In the fifth aspect, the PTRS of the first layer and the PTRS of the second layer include respective PTRS blocks.

[0096] In a sixth aspect, the PTRS configuration indicates that a first layer among the plurality of layers includes a zero-power PTRS and a second layer among the plurality of layers includes a non-zero-power PTRS corresponding to the zero-power PTRS.

[0097] In a seventh aspect, a PTRS configuration indicates a power boost for a non-zero power PTRS.

[0098] In an eighth aspect, the PTRS configuration indicates that power boosting will not be used for non-zero power PTRS.

[0099] In a ninth aspect, a zero-power PTRS is associated with a larger block size than a non-zero-power PTRS.

[0100] In the tenth aspect, a zero-power PTRS includes a non-zero-power PTRS and at least a portion of one or more symbols adjacent to the non-zero-power PTRS.

[0101] In an eleventh aspect, non-zero power PTRS are associated with a head-tail pattern, and the location of the zero power PTRS is based at least in part on a cyclic shift.

[0102] In a twelfth aspect, the location of the non-zero power PTRS is derived based at least in part on a non-head-tail pattern having a different cyclic shift value than a pattern used to derive the location of the zero power PTRS.

[0103] In the thirteenth aspect, the first layer includes non-zero power PTRSs, and the second layer includes zero power PTRSs corresponding to the non-zero power PTRSs.

[0104] In a fourteenth aspect, a power amplifier sharing configuration indicates that a power amplifier of a UE is shared among multiple layers, a phase noise sharing configuration indicates that phase noise is shared among multiple layers, and a PTRS configuration indicates that a PTRS is transmitted in one layer among the multiple layers.

[0105] In a fifteenth aspect, a power amplifier sharing configuration indicates that a power amplifier of a UE is not shared among multiple layers, and a phase noise sharing configuration indicates that phase noise is shared among multiple layers.

[0106] In a sixteenth aspect, each layer of the plurality of layers comprises one or more non-zero power PTRS.

[0107] In a seventeenth aspect, a first layer of the plurality of layers comprises one or more non-zero power PTRSs, and a second layer of the plurality of layers comprises one or more zero power PTRSs.

[0108] In an eighteenth aspect, a power amplifier sharing configuration indicates that a power amplifier of a UE is not shared among multiple layers, and a phase noise sharing configuration indicates that phase noise is not shared among multiple layers.

[0109] In the nineteenth aspect, a first layer among the multiple layers includes one or more first non-zero power PTRS, a second layer among the multiple layers includes one or more second non-zero power PTRS, and the one or more first non-zero power PTRS do not overlap with the one or more second non-zero power PTRS.

[0110] In a twentieth aspect, each layer of the plurality of layers comprises one or more non-zero power PTRS, and the one or more non-zero power PTRS are encoded using an orthogonal cover code.

[0111] In a twenty-first aspect, a power amplifier sharing configuration indicates that a power amplifier of a UE is shared among multiple layers, and a phase noise sharing configuration indicates that phase noise is not shared among multiple layers.

[0112] In the twenty-second aspect, a first layer among the multiple layers includes one or more first non-zero power PTRS, a second layer among the multiple layers includes one or more second non-zero power PTRS, and the one or more first non-zero power PTRS do not overlap with the one or more second non-zero power PTRS.

[0113] In a twenty-third aspect, each layer of the plurality of layers comprises one or more non-zero power PTRS, and the one or more non-zero power PTRS are encoded using an orthogonal cover code.

[0114] In a twenty-fourth aspect, process 1000 includes sending information indicating a preferred PTRS waveform to a base station.

[0115] In the twenty-fifth aspect, the information indicating the preferred PTRS waveform indicates at least one of the number of layers included in the plurality of layers, the number of PTRSs per layer, or the number of PTRS blocks per layer.

[0116] In a twenty-sixth aspect, a PTRS configuration indicates a PTRS waveform for single carrier communication.

[0117] In a twenty-seventh aspect, a first layer of the plurality of layers is associated with a different PTRS configuration than a second layer of the plurality of layers.

[0118] In a twenty-eighth aspect, the single carrier communication includes uplink communication.

[0119] In a twenty-ninth aspect, the single carrier communication includes downlink communication.

[0120] In a thirtieth aspect, PTRS of a single carrier communication and data of the single carrier communication are temporally mixed, and discrete Fourier transform spreading is applied to the single carrier communication prior to OFDM modulation of the single carrier communication.

[0121] Although Fig.10 Example blocks of process 1000 are shown, but in some aspects, process 1000 may include Fig.10 The blocks in process 1000 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in process 1000. Additionally or alternatively, two or more blocks in the blocks of process 1000 may be executed in parallel.

[0122] Fig.11 1 is a diagram illustrating an example process 1100 performed, for example, by a base station according to the present disclosure. Example process 1100 is an example in which a base station (e.g., base station 110, etc.) performs operations associated with a phase tracking reference signal (PTRS) design for a single carrier waveform with multiple data layers.

[0123] like Fig.11As shown, in some aspects, process 1100 may include receiving information from a UE indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication (block 1110). For example, a base station (e.g., using transmit processor 220, receive processor 238, controller / processor 240, memory 242, etc.) may receive information from a UE (e.g., UE 120) indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication, as described above.

[0124] like Fig.11 As further shown in FIG. 1 , in some aspects, process 1100 may include sending a PTRS configuration for multiple layers to the UE based at least in part on at least one of a power amplifier sharing configuration or a phase noise sharing configuration (block 1120). For example, the base station (e.g., using transmit processor 220, receive processor 238, controller / processor 240, memory 242, etc.) may send a PTRS configuration for multiple layers to the UE based at least in part on at least one of a power amplifier sharing configuration or a phase noise sharing configuration, as described above.

[0125] like Fig.11 As further shown in FIG. 1 , in some aspects, process 1100 may include performing single carrier communication according to a PTRS configuration (block 1130). For example, a base station (e.g., using transmit processor 220, receive processor 238, controller / processor 240, memory 242, etc.) may perform single carrier communication according to a PTRS configuration, as described above.

[0126] Process 1100 may include additional aspects, such as any single aspect or any combination of the aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0127] In a first aspect, the PTRS configuration indicates that each of the plurality of layers will include one or more PTRSs.

[0128] In a second aspect, the one or more PTRSs include multiple PTRSs inserted at different times within a symbol.

[0129] In a third aspect, a PTRS of a first layer of the plurality of layers is temporally aligned with a PTRS of a second layer of the plurality of layers.

[0130] In a fourth aspect, the PTRS of the first layer and the PTRS of the second layer are encoded using orthogonal cover codes.

[0131] In the fifth aspect, the PTRS of the first layer and the PTRS of the second layer include respective PTRS blocks.

[0132] In a sixth aspect, the PTRS configuration indicates that a first layer among the plurality of layers includes a zero-power PTRS and a second layer among the plurality of layers includes a non-zero-power PTRS corresponding to the zero-power PTRS.

[0133] In a seventh aspect, a PTRS configuration indicates a power boost for a non-zero power PTRS.

[0134] In an eighth aspect, the PTRS configuration indicates that power boosting will not be used for non-zero power PTRS.

[0135] In a ninth aspect, a zero-power PTRS is associated with a larger block size than a non-zero-power PTRS.

[0136] In the tenth aspect, a zero-power PTRS includes a non-zero-power PTRS and at least a portion of one or more symbols adjacent to the non-zero-power PTRS.

[0137] In an eleventh aspect, non-zero power PTRS are associated with a head-tail pattern, and the location of the zero power PTRS is based at least in part on a cyclic shift.

[0138] In a twelfth aspect, the location of a non-zero power PTRS is derived based at least in part on a non-head-tail pattern having a different cyclic shift value than a pattern used to derive the location of the zero power PTRS, wherein the different cyclic shift value is signaled by a base station to a UE.

[0139] In the thirteenth aspect, the first layer includes non-zero power PTRSs, and the second layer includes zero power PTRSs corresponding to the non-zero power PTRSs.

[0140] In a fourteenth aspect, a power amplifier sharing configuration indicates that a power amplifier of a UE is shared among multiple layers, a phase noise sharing configuration indicates that phase noise is shared among multiple layers, and a PTRS configuration indicates that a PTRS is transmitted in one layer among the multiple layers.

[0141] In a fifteenth aspect, a power amplifier sharing configuration indicates that a power amplifier of a UE is not shared among multiple layers, and a phase noise sharing configuration indicates that phase noise is shared among multiple layers.

[0142] In a sixteenth aspect, each layer of the plurality of layers comprises one or more non-zero power PTRS.

[0143] In a seventeenth aspect, a first layer of the plurality of layers comprises one or more non-zero power PTRSs, and a second layer of the plurality of layers comprises one or more zero power PTRSs.

[0144] In an eighteenth aspect, a power amplifier sharing configuration indicates that a power amplifier of a UE is not shared among multiple layers, and a phase noise sharing configuration indicates that phase noise is not shared among multiple layers.

[0145] In the nineteenth aspect, a first layer among the multiple layers includes one or more first non-zero power PTRS, a second layer among the multiple layers includes one or more second non-zero power PTRS, and the one or more first non-zero power PTRS do not overlap with the one or more second non-zero power PTRS.

[0146] In a twentieth aspect, each layer of the plurality of layers comprises one or more non-zero power PTRS, and the one or more non-zero power PTRS are encoded using an orthogonal cover code.

[0147] In a twenty-first aspect, a power amplifier sharing configuration indicates that a power amplifier of a UE is shared among multiple layers, and a phase noise sharing configuration indicates that phase noise is not shared among multiple layers.

[0148] In the twenty-second aspect, a first layer among the multiple layers includes one or more first non-zero power PTRS, a second layer among the multiple layers includes one or more second non-zero power PTRS, and the one or more first non-zero power PTRS do not overlap with the one or more second non-zero power PTRS.

[0149] In a twenty-third aspect, each layer of the plurality of layers comprises one or more non-zero power PTRS, and the one or more non-zero power PTRS are encoded using an orthogonal cover code.

[0150] In a twenty-fourth aspect, process 1100 includes receiving information indicating a preferred PTRS waveform from a UE, and determining a PTRS configuration based at least in part on the information indicating the preferred PTRS waveform.

[0151] In the twenty-fifth aspect, the information indicating the preferred PTRS waveform indicates at least one of the number of layers included in the plurality of layers, the number of PTRSs per layer, or the number of PTRS blocks per layer.

[0152] In a twenty-sixth aspect, a PTRS configuration indicates a PTRS waveform for single carrier communication.

[0153] In a twenty-seventh aspect, a first layer of the plurality of layers is associated with a different PTRS configuration than a second layer of the plurality of layers.

[0154] In a twenty-eighth aspect, the single carrier communication includes uplink communication.

[0155] In a twenty-ninth aspect, the single carrier communication includes downlink communication.

[0156] In a thirtieth aspect, PTRS of a single carrier communication and data of the single carrier communication are temporally mixed, and discrete Fourier transform spreading is applied to the single carrier communication prior to OFDM modulation of the single carrier communication.

[0157] Although Fig.11 Example blocks of process 1100 are shown, but in some aspects process 1100 may include Fig.11 The blocks depicted in the process 1100 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in the process 1100. Additionally or alternatively, two or more blocks in the blocks of the process 1100 may be executed in parallel.

[0158] The following provides a summary of some aspects of the present disclosure:

[0159] Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: sending information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers of single carrier communication to a base station; receiving a phase tracking reference signal (PTRS) configuration for multiple layers from the base station based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration; and performing single carrier communication according to the PTRS configuration.

[0160] Aspect 2: The method according to aspect 1, wherein the PTRS configuration indicates that each layer of the plurality of layers will include one or more PTRSs.

[0161] Aspect 3: The method according to aspect 2, wherein the one or more PTRSs include multiple PTRSs inserted at different times within a symbol.

[0162] Aspect 4: The method according to Aspect 2, wherein the PTRS of a first layer among the multiple layers is aligned in time with the PTRS of a second layer among the multiple layers.

[0163] Aspect 5: The method according to Aspect 4, wherein the PTRS of the first layer and the PTRS of the second layer are encoded using orthogonal cover codes.

[0164] Aspect 6: The method according to Aspect 5, wherein the PTRS of the first layer and the PTRS of the second layer include respective PTRS blocks.

[0165] Aspect 7: The method according to any one of Aspects 1 to 6, wherein the PTRS configuration indicates that a first layer among the multiple layers includes a zero-power PTRS and a second layer among the multiple layers includes a non-zero-power PTRS corresponding to the zero-power PTRS.

[0166] Aspect 8: The method according to Aspect 7, wherein the PTRS configuration indicates a power boost for a non-zero power PTRS.

[0167] Aspect 9: The method according to aspect 7, wherein the PTRS configuration indicates that power boosting will not be used for non-zero power PTRS.

[0168] Aspect 10: The method according to aspect 7, wherein the zero-power PTRS is associated with a larger block size than the non-zero-power PTRS.

[0169] Aspect 11: The method according to Aspect 7, wherein the zero-power PTRS includes a non-zero-power PTRS and at least a portion of one or more symbols adjacent to the non-zero-power PTRS.

[0170] Aspect 12: The method according to aspect 11, wherein the non-zero power PTRS is associated with a head-tail pattern, and wherein the location of the zero power PTRS is based at least in part on a cyclic shift.

[0171] Aspect 13: The method according to Aspect 7, wherein the location of the non-zero power PTRS is derived based at least in part on a non-head-tail pattern having a different cyclic shift value than the pattern used to derive the location of the zero power PTRS.

[0172] Aspect 14: The method according to Aspect 7, wherein the first layer includes non-zero power PTRS, and the second layer includes zero power PTRS corresponding to the non-zero power PTRS.

[0173] Aspect 15: A method according to any one of Aspects 1 to 14, wherein the power amplifier sharing configuration indicates that the power amplifier of the UE is shared between multiple layers, and the phase noise sharing configuration indicates that the phase noise is shared between multiple layers, and wherein the PTRS configuration indicates that PTRS is sent in one layer among the multiple layers.

[0174] Aspect 16: The method according to any one of Aspects 1 to 15, wherein the power amplifier sharing configuration indicates that the power amplifier of the UE is not shared among the multiple layers, and the phase noise sharing configuration indicates that the phase noise is shared among the multiple layers.

[0175] Aspect 17: The method according to Aspect 16, wherein each layer of the plurality of layers comprises one or more non-zero power PTRS.

[0176] Aspect 18: The method according to aspect 16, wherein a first layer of the plurality of layers comprises one or more non-zero power PTRSs, and a second layer of the plurality of layers comprises one or more zero power PTRSs.

[0177] Aspect 19: The method according to any one of Aspects 1 to 17, wherein the power amplifier sharing configuration indicates that the power amplifier of the UE is not shared among multiple layers, and the phase noise sharing configuration indicates that the phase noise is not shared among multiple layers.

[0178] Aspect 20: A method according to Aspect 19, wherein a first layer among multiple layers includes one or more first non-zero power PTRS, and a second layer among multiple layers includes one or more second non-zero power PTRS, and wherein the one or more first non-zero power PTRS do not overlap with the one or more second non-zero power PTRS.

[0179] Aspect 21: The method according to aspect 19, wherein each layer of the plurality of layers comprises one or more non-zero power PTRS, and wherein the one or more non-zero power PTRS are encoded using an orthogonal cover code.

[0180] Aspect 22: The method according to any one of Aspects 1 to 21, wherein the power amplifier sharing configuration indicates that the power amplifier of the UE is shared among multiple layers, and the phase noise sharing configuration indicates that the phase noise is not shared among the multiple layers.

[0181] Aspect 23: A method according to Aspect 22, wherein a first layer among multiple layers includes one or more first non-zero power PTRS, and a second layer among multiple layers includes one or more second non-zero power PTRS, and wherein the one or more first non-zero power PTRS do not overlap with the one or more second non-zero power PTRS.

[0182] Aspect 24: The method according to Aspect 22, wherein each layer of the plurality of layers comprises one or more non-zero power PTRS, and wherein the one or more non-zero power PTRS are encoded using an orthogonal cover code.

[0183] Aspect 25: The method according to any one of Aspects 1 to 24 further includes: sending information indicating a preferred PTRS waveform to a base station.

[0184] Aspect 26: The method according to Aspect 25, wherein the information indicating the preferred PTRS waveform indicates at least one of the following: the number of layers included in the plurality of layers, the number of PTRSs per layer, or the number of PTRS blocks per layer.

[0185] Aspect 27: The method according to any one of Aspects 1 to 26, wherein the PTRS configuration indicates a PTRS waveform for single carrier communication.

[0186] Aspect 28: The method according to any one of Aspects 1 to 27, wherein a first layer of the plurality of layers is associated with a different PTRS configuration than a second layer of the plurality of layers.

[0187] Aspect 29: The method according to any one of Aspects 1 to 28, wherein the single carrier communication includes uplink communication.

[0188] Aspect 30: The method according to any one of aspects 1 to 28, wherein the single carrier communication includes downlink communication.

[0189] Aspect 31: A method according to any one of Aspects 1 to 30, wherein the PTRS of the single carrier communication and the data of the single carrier communication are mixed in time, and wherein discrete Fourier transform expansion is applied to the single carrier communication before orthogonal frequency division multiplexing modulation of the single carrier communication.

[0190] Aspect 32: A method of wireless communication performed by a base station, comprising: receiving information indicating at least one of a power amplifier sharing configuration or a phase noise sharing configuration for multiple layers for single carrier communication from a user equipment (UE); sending a phase tracking reference signal (PTRS) configuration for multiple layers to the UE based at least in part on at least one of the power amplifier sharing configuration or the phase noise sharing configuration; and performing single carrier communication according to the PTRS configuration.

[0191] Aspect 33: The method according to Aspect 32, wherein the PTRS configuration indicates that each layer of the plurality of layers will include one or more PTRSs.

[0192] Aspect 34: The method according to Aspect 33, wherein the one or more PTRSs include multiple PTRSs inserted at different times within a symbol.

[0193] Aspect 35: The method according to Aspect 34, wherein the PTRS of a first layer among the multiple layers is aligned in time with the PTRS of a second layer among the multiple layers.

[0194] Aspect 36: The method according to Aspect 35, wherein the PTRS of the first layer and the PTRS of the second layer are encoded using orthogonal cover codes.

[0195] Aspect 37: The method according to Aspect 36, wherein the PTRS of the first layer and the PTRS of the second layer include respective PTRS blocks.

[0196] Aspect 38: The method according to any one of Aspects 32 to 37, wherein the PTRS configuration indicates that a first layer among the multiple layers includes a zero-power PTRS and a second layer among the multiple layers includes a non-zero-power PTRS corresponding to the zero-power PTRS.

[0197] Aspect 39: The method according to Aspect 38, wherein the PTRS configuration indicates a power boost for a non-zero power PTRS.

[0198] Aspect 40: The method according to Aspect 38, wherein the PTRS configuration indicates that power boosting is not to be used for non-zero power PTRS.

[0199] Aspect 41: The method of aspect 38, wherein a zero-power PTRS is associated with a larger block size than a non-zero-power PTRS.

[0200] Aspect 42: The method according to Aspect 38, wherein the zero-power PTRS includes a non-zero-power PTRS and at least a portion of one or more symbols adjacent to the non-zero-power PTRS.

[0201] Aspect 43: The method according to Aspect 42, wherein the non-zero power PTRS is associated with a head-tail pattern, and wherein the location of the zero power PTRS is based at least in part on a cyclic shift.

[0202] Aspect 44: A method according to Aspect 38, wherein the position of the non-zero power PTRS is derived at least in part based on a non-head-tail pattern having a different cyclic shift value than the pattern used to derive the position of the zero power PTRS, wherein the different cyclic shift value is signaled by the base station to the UE.

[0203] Aspect 45: The method according to Aspect 38, wherein the first layer includes non-zero power PTRS, and the second layer includes zero power PTRS corresponding to the non-zero power PTRS.

[0204] Aspect 46: A method according to any one of Aspects 32-45, wherein the power amplifier sharing configuration indicates that the power amplifier of the UE is shared between multiple layers, and the phase noise sharing configuration indicates that the phase noise is shared between multiple layers, and wherein the PTRS configuration indicates that the PTRS is sent in one layer of the multiple layers.

[0205] Aspect 47: The method according to any one of Aspects 32 to 46, wherein the power amplifier sharing configuration indicates that the power amplifier of the UE is not shared among the multiple layers, and the phase noise sharing configuration indicates that the phase noise is shared among the multiple layers.

[0206] Aspect 48: The method according to Aspect 47, wherein each layer of the plurality of layers comprises one or more non-zero power PTRS.

[0207] Aspect 49: The method according to Aspect 47, wherein a first layer of the plurality of layers comprises one or more non-zero power PTRSs, and a second layer of the plurality of layers comprises one or more zero power PTRSs.

[0208] Aspect 50: The method according to any one of Aspects 32 to 49, wherein the power amplifier sharing configuration indicates that the power amplifier of the UE is not shared among the multiple layers, and the phase noise sharing configuration indicates that the phase noise is not shared among the multiple layers.

[0209] Aspect 51: A method according to Aspect 50, wherein a first layer among multiple layers includes one or more first non-zero power PTRS, and a second layer among multiple layers includes one or more second non-zero power PTRS, and wherein the one or more first non-zero power PTRS do not overlap with the one or more second non-zero power PTRS.

[0210] Aspect 52: The method according to Aspect 51, wherein each layer of the plurality of layers comprises one or more non-zero power PTRS, and wherein the one or more non-zero power PTRS are encoded using an orthogonal cover code.

[0211] Aspect 53: The method according to any one of Aspects 32 to 52, wherein the power amplifier sharing configuration indicates that the power amplifier of the UE is shared among the multiple layers, and the phase noise sharing configuration indicates that the phase noise is not shared among the multiple layers.

[0212] Aspect 54: A method according to Aspect 53, wherein a first layer among multiple layers includes one or more first non-zero power PTRS, and a second layer among multiple layers includes one or more second non-zero power PTRS, and wherein the one or more first non-zero power PTRS do not overlap with the one or more second non-zero power PTRS.

[0213] Aspect 55: The method according to Aspect 53, wherein each layer of the plurality of layers comprises one or more non-zero power PTRS, and wherein the one or more non-zero power PTRS are encoded using an orthogonal cover code.

[0214] Aspect 56: The method according to any one of Aspects 32 to 55, further comprising: receiving information indicating a preferred PTRS waveform from a UE; and determining a PTRS configuration based at least in part on the information indicating the preferred PTRS waveform.

[0215] Aspect 57: The method according to Aspect 56, wherein the information indicating the preferred PTRS waveform indicates at least one of the following: the number of layers included in the plurality of layers, the number of PTRSs per layer, or the number of PTRS blocks per layer.

[0216] Aspect 58: The method according to any one of Aspects 32 to 57, wherein the PTRS configuration indicates a PTRS waveform for single carrier communication.

[0217] Aspect 59: The method according to any one of Aspects 32 to 58, wherein a first layer of the plurality of layers is associated with a different PTRS configuration than a second layer of the plurality of layers.

[0218] Aspect 60: The method according to any one of Aspects 32 to 59, wherein the single carrier communication includes uplink communication.

[0219] Aspect 61: The method according to any one of Aspects 32 to 60, wherein the single carrier communication includes downlink communication.

[0220] Aspect 62: A method according to any one of Aspects 32-61, wherein the PTRS of the single carrier communication and the data of the single carrier communication are mixed in time, and wherein discrete Fourier transform expansion is applied to the single carrier communication before orthogonal frequency division multiplexing modulation of the single carrier communication.

[0221] Aspect 63: An apparatus for wireless communication at a device, 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 a method according to one or more aspects of Aspect 1-Aspect 62.

[0222] Aspect 64: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors being configured to perform the method of one or more aspects of Aspect 1-Aspect 62.

[0223] Aspect 65: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more aspects of Aspect 1-Aspect 62.

[0224] Aspect 66: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 1-62.

[0225] Aspect 67: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more aspects of aspects 1-62.

[0226] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of the various aspects.

[0227] As used herein, the term "component" is intended to be interpreted broadly as a combination of hardware and / or hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language or other, "software" should be interpreted broadly as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, processes and / or functions and other examples. As used herein, a processor is implemented with a combination of hardware and / or hardware and software. It will be apparent that the system and / or method described herein can be implemented with a combination of hardware and / or hardware and software in different forms. The actual specialized control hardware or software code used to implement these systems and / or methods is not a limitation on various aspects. Therefore, the operation and behavior of the system and / or method are described herein without citing a specific software code-it is to be understood that software and hardware can be designed to implement the system and / or method at least in part based on the description herein.

[0228] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0229] Even if the specific combination of features is recorded in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner not specifically recorded in the claims and / or disclosed in the specification. Although each dependent claim listed below can only directly depend on a claim, the disclosure of various aspects includes that each dependent claim is combined with each other claim in the claim set. As used herein, the phrase "at least one of" referring to the list of items refers to any combination of those items, including single members. As an example, "at least one of a, b or c" is intended to cover a, b, c, ab, ac, bc and abc, and any combination (for example, aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc or any other sorting of a, b and c) with multiple identical elements.

[0230] None of the elements, actions or instructions used herein should be interpreted as key or essential, unless explicitly described as such. In addition, as used herein, the articles "a" and "an" are intended to include one or more projects, and can be used interchangeably with "one or more". Further, as used herein, the article "the" is intended to include one or more projects quoted in conjunction with the article "the", and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more projects (for example, related projects, unrelated projects, or a combination of related projects and unrelated projects), and can be used interchangeably with "one or more". In the case of only one project, phrases "only one" or similar language are used. In addition, as used herein, the terms "has", "have", "having" etc. are intended to be open terms. In addition, unless explicitly stated otherwise, phrase "based on" is intended to mean "based at least in part on". Furthermore, as used herein, the term "or" when used in a series is intended to be inclusive and can be used interchangeably with "and / or" unless expressly stated otherwise (e.g., if used in conjunction with "either" or "only one of...").

Claims

1. An apparatus for wireless communication at a user equipment (UE), comprising: Memory; as well as One or more processors, coupled to the memory, configured to: sending information indicating a phase noise sharing configuration of a plurality of layers for single carrier communication to a base station, wherein the phase noise sharing configuration indicates whether multiple layers of the plurality of layers share phase noise; receiving, from the base station, a phase tracking reference signal (PTRS) configuration for the plurality of layers based at least in part on the phase noise sharing configuration, wherein the PTRS configuration is associated with each of the plurality of layers, including a plurality of PTRS at different times within a symbol, and wherein a PTRS of a first layer of the plurality of layers is aligned in time with a PTRS of a second layer of the plurality of layers; and The single carrier communication is performed according to the PTRS configuration.

2. The device according to claim 1, wherein: The PTRS of the first layer and the PTRS of the second layer use orthogonal cover codes.

3. The device according to claim 2, wherein: The PTRS of the first layer and the PTRS of the second layer include corresponding PTRS blocks.

4. The device according to claim 1, wherein: The PTRS configuration indicates that the first layer includes a zero-power PTRS and the second layer includes a non-zero-power PTRS corresponding to the zero-power PTRS.

5. The device according to claim 4, wherein: The zero-power PTRS is associated with a larger block size than the non-zero-power PTRS.

6. The device according to claim 4, wherein: The location of the non-zero power PTRS is based at least in part on a non-head-tail pattern having a different cyclic shift value than a pattern used to derive the location of the zero power PTRS.

7. The device according to claim 4, wherein: The first layer includes a non-zero power PTRS, and the second layer includes a zero power PTRS corresponding to the non-zero power PTRS.

8. The device according to claim 1, wherein: The information further indicates a power amplifier sharing configuration indicating that a power amplifier of the UE is shared among the plurality of layers, and the phase noise sharing configuration indicating that phase noise is shared among the plurality of layers.

9. The device according to claim 1, wherein: The one or more processors are further configured to: Information indicating a preferred PTRS waveform is sent to the base station.

10. The device according to claim 9, wherein: The information indicating the preferred PTRS waveform indicates at least one of the following: the number of layers included in the plurality of layers, The number of PTRS per layer, or The number of PTRS blocks per layer.

11. The device according to claim 9, wherein: The information indicating the preferred PTRS waveform is information indicating the phase noise sharing configuration.

12. The device according to claim 1, wherein: The PTRS configuration indicates a PTRS waveform used for the single carrier communication.

13. The device according to claim 1, wherein: The first layer is associated with a different PTRS configuration than the second layer.

14. The device according to claim 1, wherein: The PTRS of the single carrier communication and the data of the single carrier communication are mixed in time.

15. An apparatus for wireless communication at a base station, comprising: Memory; as well as One or more processors coupled to the memory, configured to: receiving information indicating a phase noise sharing configuration of a plurality of layers for single carrier communication from a user equipment (UE), wherein the phase noise sharing configuration indicates whether multiple layers of the plurality of layers share phase noise; transmitting, to the UE, a phase tracking reference signal (PTRS) configuration for the plurality of layers based at least in part on the phase noise sharing configuration, wherein the PTRS configuration is associated with each of the plurality of layers, including a plurality of PTRS at different times within a symbol, and wherein a PTRS of a first layer of the plurality of layers is aligned in time with a PTRS of a second layer of the plurality of layers; and The single carrier communication is performed according to the PTRS configuration.

16. The device according to claim 15, wherein: The PTRS of the first layer and the PTRS of the second layer use orthogonal cover codes.

17. The device according to claim 16, wherein: The PTRS of the first layer and the PTRS of the second layer include respective PTRS blocks.

18. The device according to claim 15, wherein: The PTRS configuration indicates that the first layer includes a zero-power PTRS and the second layer includes a non-zero-power PTRS corresponding to the zero-power PTRS.

19. The device according to claim 18, wherein: The location of the non-zero power PTRS is based at least in part on a non-head-tail pattern having a different cyclic shift value than a pattern used to derive the location of the zero power PTRS, wherein the different cyclic shift value is signaled by the base station to the UE.

20. The device according to claim 18, wherein The zero-power PTRS is associated with a larger block size than the non-zero-power PTRS.

21. The device according to claim 18, wherein The first layer includes a non-zero power PTRS, and the second layer includes a zero power PTRS corresponding to the non-zero power PTRS.

22. The device according to claim 15, wherein: The information further indicates a power amplifier sharing configuration indicating that a power amplifier of the UE is shared among the plurality of layers, and the phase noise sharing configuration indicating that phase noise is shared among the plurality of layers.

23. The device according to claim 15, wherein: The first layer is associated with a different PTRS configuration than the second layer.

24. The device according to claim 15, wherein: The one or more processors are further configured to: receiving information indicating a preferred PTRS waveform from the UE; and The PTRS configuration is determined based at least in part on the information indicative of the preferred PTRS waveform.

25. The device according to claim 24, wherein: The information indicating the preferred PTRS waveform indicates at least one of the following: the number of layers included in the plurality of layers, The number of PTRS per layer, or The number of PTRS blocks per layer.

26. The device according to claim 15, wherein: The PTRS configuration indicates a PTRS waveform used for the single carrier communication.

27. The device according to claim 15, wherein: The PTRS of the single carrier communication and the data of the single carrier communication are mixed in time, and wherein the one or more processors, when executing the single carrier communication, are configured to apply discrete Fourier transform expansion to the single carrier communication before orthogonal frequency division multiplexing modulation of the single carrier communication.

28. A method of wireless communication performed by an apparatus of a user equipment (UE), comprising: sending information indicating a phase noise sharing configuration of a plurality of layers for single carrier communication to a base station, wherein the phase noise sharing configuration indicates whether multiple layers of the plurality of layers share phase noise; receiving, from the base station, a phase tracking reference signal (PTRS) configuration for the plurality of layers based at least in part on the phase noise sharing configuration, wherein the PTRS configuration is associated with each of the plurality of layers, including a plurality of PTRS at different times within a symbol, and wherein a PTRS of a first layer of the plurality of layers is aligned in time with a PTRS of a second layer of the plurality of layers; and The single carrier communication is performed according to the PTRS configuration.

29. The method according to claim 28, further comprising: Information indicating a preferred PTRS waveform is sent to the base station.

30. A method of wireless communication performed by a base station, comprising: receiving information indicating a phase noise sharing configuration of a plurality of layers for single carrier communication from a user equipment (UE), wherein the phase noise sharing configuration indicates whether multiple layers of the plurality of layers share phase noise; transmitting, to the UE, a phase tracking reference signal (PTRS) configuration for the plurality of layers based at least in part on the phase noise sharing configuration, wherein the PTRS configuration is associated with each of the plurality of layers, including a plurality of PTRS at different times within a symbol, and wherein a PTRS of a first layer of the plurality of layers is aligned in time with a PTRS of a second layer of the plurality of layers; and The single carrier communication is performed according to the PTRS configuration.

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