Techniques for enhanced sounding reference signal multiplexing

Abstract

Techniques and devices for wireless communication are described. A user equipment (UE) may receive a configuration from a network entity for multiplexing a reference signal with a data signal in time and frequency or for multiplexing a reference signal in Doppler domain. The UE may receive an assignment of a plurality of time-frequency resources from the network entity for transmission of the reference signal. The UE may multiplex the reference signal across the assigned time-frequency resources according to the received configuration. The UE may transmit the multiplexed reference signal to the network entity.

Description

[0001] Cross-reference

[0002] This patent application claims priority to U.S. Patent Application No. 18 / 048,778, entitled "TECHNIQUES FOR ENHANCED SOUNDING REFERENCE SIGNAL MULTIPLEXING," filed on October 21, 2022, by Duan et al., which is assigned to the assignee of the present application and is hereby incorporated by reference in its entirety. Field of the Invention

[0003] The present disclosure relates, for example, to wireless communication systems and, more particularly, to techniques for enhanced sounding reference signal (SRS) multiplexing. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, etc. These systems may be capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multi-access systems include fourth-generation (4G) systems (such as Long-Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems) and fifth-generation (5G) systems (which may be referred to as New Radio (NR) systems). These systems may employ techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multi-access communication system may include one or more base stations, each of which supports wireless communication for communication devices, which may be referred to as user equipment (UE). Network entities may use reference signals transmitted from the UE to perform channel estimation procedures. In some cases, the prior art for transmitting such reference signals may be defective. Summary of the Invention

[0005] The described techniques relate to improved apparatuses and devices that support techniques for enhanced sounding reference signal (SRS) multiplexing. For example, the described techniques provide a framework for multiplexing reference signals. In some examples, a user equipment (UE) may receive from a network entity a configuration for multiplexing SRS with data signals in time and frequency. In such examples, the UE may receive from the network entity an assignment of multiple time-frequency resources for transmission of SRS. Additionally or alternatively, in such examples, the UE may multiplex SRS with data signals across the assigned time-frequency resources according to the received configuration and transmit the multiplexed SRS to the network entity.

[0006] In some other examples, the UE may receive from a network entity a configuration for multiplexing multiple reference signals in the Doppler domain. In such examples, the UE may receive an assignment of multiple time-frequency resources for the transmission of multiple reference signals. Additionally or alternatively, in such examples, the UE may multiplex multiple reference signals across the assigned time-frequency resources according to the received configuration and transmit the multiplexed reference signals to the network entity.

[0007] A method for wireless communication at a UE is described. The method may include receiving from a network entity a configuration for multiplexing SRS with a data signal in time and frequency; receiving from the network entity an assignment of a set of multiple time-frequency resources for the transmission of the SRS; multiplexing the SRS with the data signal across the assigned set of multiple time-frequency resources according to the received configuration; and transmitting the multiplexed SRS to the network entity.

[0008] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive from a network entity a configuration for multiplexing SRS with a data signal in time and frequency; receive from the network entity an assignment of a set of multiple time-frequency resources for the transmission of the SRS; multiplex the SRS with the data signal across the assigned set of multiple time-frequency resources according to the received configuration; and transmit the multiplexed SRS to the network entity.

[0009] Another apparatus for wireless communication at a UE is described. The apparatus may include means for receiving from a network entity a configuration for multiplexing SRS with a data signal in time and frequency; means for receiving from the network entity an assignment of a set of multiple time-frequency resources for the transmission of the SRS; means for multiplexing the SRS with the data signal across the assigned set of multiple time-frequency resources according to the received configuration; and means for transmitting the multiplexed SRS to the network entity.

[0010] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to: receive from a network entity a configuration for multiplexing SRS with a data signal in time and frequency; receive from the network entity an assignment of a set of multiple time-frequency resources for the transmission of the SRS; multiplex the SRS with the data signal across the assigned set of multiple time-frequency resources according to the received configuration; and transmit the multiplexed SRS to the network entity.

[0011] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, multiplexing the SRS with data signals may include operations, features, components, or instructions for the following actions: receiving an indication from a network entity to rate-match data signals around the SRS; in response to receiving the indication, rate-matching the data signals around the SRS; and multiplexing the SRS with the rate-matched data signals across a set of multiple assigned time-frequency resources.

[0012] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, rate-matching data signals around the SRS may include operations, features, components, or instructions for the following actions: receiving an indication of a comb pattern from a network entity, the comb pattern identifying resource blocks within a set of multiple assigned time-frequency resources to be used for transmission of the SRS at a UE; and rate-matching the data signals around the SRS across the set of multiple assigned time-frequency resources according to the indicated comb pattern.

[0013] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, multiplexing the SRS with data signals may include operations, features, components, or instructions for the following actions: receiving an indication of a comb pattern and a frequency offset associated with the comb pattern from a network entity, the comb pattern and frequency offset identifying resource blocks within a set of multiple assigned time-frequency resources to be used for transmission of the SRS at a UE; and multiplexing the SRS with the data signals across the set of multiple assigned time-frequency resources according to the indicated comb pattern and frequency offset.

[0014] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, multiplexing the SRS with data signals may include operations, features, components, or instructions for the following actions: encoding the SRS using a first covering code; encoding the data signals using a second covering code orthogonal to the first covering code; and multiplexing the SRS with the data signals across a set of multiple assigned time-frequency resources.

[0015] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, multiplexing the SRS with data signals may include operations, features, components, or instructions for the following actions: multiplexing the SRS with the data signals and at least one demodulation reference signal (DMRS) across a set of multiple assigned time-frequency resources.

[0016] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, multiplexing the SRS with a data signal may include operations, features, components, or instructions for the following actions: receiving, from a network entity, an indication of a resource block to be used for transmission of the SRS at a UE within a set of assigned multiple time-frequency resources; and multiplexing the SRS with the data signal across the indicated resource blocks within the set of assigned multiple time-frequency resources, wherein the SRS occupies a first portion of the indicated resource blocks and the data signal occupies a second portion of the indicated resource blocks.

[0017] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for the following actions: estimating, at a network entity, a channel for wireless communication between the UE and the network entity; sensing, at the network entity, an environment associated with the UE; and identifying, at the network entity, a location of the UE.

[0018] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the data signal includes a physical uplink control channel (PUCCH) signal or a physical uplink shared channel (PUSCH) signal.

[0019] A method for wireless communication at a UE is described. The method may include receiving, from a network entity, a configuration for multiplexing a set of multiple reference signals in the Doppler domain; receiving, from the network entity, an assignment of a set of multiple time-frequency resources for transmission of the set of multiple reference signals; multiplexing the set of multiple reference signals across the assigned set of multiple time-frequency resources according to the received configuration; and transmitting the multiplexed set of multiple reference signals to the network entity.

[0020] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive, from a network entity, a configuration for multiplexing a set of multiple reference signals in the Doppler domain; receive, from the network entity, an assignment of a set of multiple time-frequency resources for transmission of the set of multiple reference signals; multiplex the set of multiple reference signals across the assigned set of multiple time-frequency resources according to the received configuration; and transmit the multiplexed set of multiple reference signals to the network entity.

[0021] Describes another apparatus for wireless communication at a UE. The apparatus may include components for receiving, from a network entity, a configuration for multiplexing a set of multiple reference signals in the Doppler domain; components for receiving, from the network entity, an assignment of a set of multiple time-frequency resources for transmission of the set of multiple reference signals; components for multiplexing the set of multiple reference signals across the assigned set of multiple time-frequency resources according to the received configuration; and components for transmitting the multiplexed set of multiple reference signals to the network entity.

[0022] Describes a non-transitory computer-readable medium storing code for wireless communication at a UE. The code may include instructions executable by a processor to perform the following operations: receive, from a network entity, a configuration for multiplexing a set of multiple reference signals in the Doppler domain; receive, from the network entity, an assignment of a set of multiple time-frequency resources for transmission of the set of multiple reference signals; multiplex the set of multiple reference signals across the assigned set of multiple time-frequency resources according to the received configuration; and transmit the multiplexed set of multiple reference signals to the network entity.

[0023] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, multiplexing the set of multiple reference signals may include operations, features, components, or instructions for the following actions: receiving, from a network entity, an indication of a set of multiple phase codes for multiplexing the set of multiple reference signals in the Doppler domain; and using the indicated set of multiple phase codes to multiplex the set of multiple reference signals.

[0024] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, using the indicated set of multiple phase codes to multiplex the set of multiple reference signals may include operations, features, components, or instructions for the following actions: multiplexing each reference signal in the set of multiple reference signals with a corresponding phase code in the indicated set of multiple phase codes.

[0025] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, each corresponding phase code may be based on a corresponding antenna port in a set of multiple antenna ports at the UE and a corresponding symbol within the assigned set of multiple time-frequency resources.

[0026] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for the following actions: estimating, at the network entity, a channel for wireless communication between the UE and the network entity; sensing, at the network entity, an environment associated with the UE; and identifying, at the network entity, a location of the UE.

[0027] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, a set of multiple reference signals includes SRS, positioning reference signals (PRS), or sensing reference signals.

[0028] A method for wireless communication at a network entity is described. The method may include outputting to a UE a configuration for multiplexing SRS with data signals in time and frequency; outputting to the UE an assignment of a set of multiple time-frequency resources for transmission of the SRS; and obtaining from the UE the SRS and the data signals, wherein the obtained SRS and the obtained data signals are multiplexed across the assigned set of multiple time-frequency resources according to the output configuration.

[0029] An apparatus for wireless communication at a network entity is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to output to a UE a configuration for multiplexing SRS with data signals in time and frequency; output to the UE an assignment of a set of multiple time-frequency resources for transmission of the sounding reference signals; and obtain from the UE the SRS and the data signals, wherein the obtained SRS and the obtained data signals are multiplexed across the assigned set of multiple time-frequency resources according to the output configuration.

[0030] Another apparatus for wireless communication at a network entity is described. The apparatus may include means for outputting to a UE a configuration for multiplexing SRS with data signals in time and frequency; means for outputting to the UE an assignment of a set of multiple time-frequency resources for transmission of the SRS; and means for obtaining from the UE the SRS and the data signals, wherein the obtained SRS and the obtained data signals are multiplexed across the assigned set of multiple time-frequency resources according to the output configuration.

[0031] A non-transitory computer-readable medium storing code for wireless communication at a network entity is described. The code may include instructions executable by a processor to: output to a UE a configuration for multiplexing SRS with data signals in time and frequency; output to the UE an assignment of a set of multiple time-frequency resources for transmission of the sounding reference signals; and obtain from the UE the SRS and the data signals, wherein the obtained SRS and the obtained data signals are multiplexed across the assigned set of multiple time-frequency resources according to the output configuration.

[0032] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the output configuration may include operations, features, components, or instructions for the following actions: outputting an indication of a comb pattern to a UE, the comb pattern identifying resource blocks within a set of assigned multiple time-frequency resources to be used for transmission of SRS at the UE, wherein rate matching of the obtained data signal may be performed around the SRS according to the indicated comb pattern.

[0033] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, outputting an indication to a UE to perform rate matching of a data signal around the SRS according to the indicated comb pattern, wherein obtaining the data signal may be based on the output indication.

[0034] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the output configuration may include operations, features, components, or instructions for the following actions: outputting an indication of a comb pattern and a frequency offset to a UE, the comb pattern and the frequency offset identifying resource blocks within a set of assigned multiple time-frequency resources to be used for transmission of SRS at the UE, wherein the obtained SRS may be multiplexed according to the indicated comb pattern and frequency offset.

[0035] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the obtained SRS may be encoded using a first covering code, and the obtained data signal may be encoded using a second covering code orthogonal to the first covering code.

[0036] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for the following actions: obtaining DMRS from a UE, wherein the obtained DMRS may be multiplexed with the obtained SRS and the obtained data signal across a set of assigned multiple time-frequency resources.

[0037] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the output configuration may include operations, features, components, or instructions for the following actions: outputting an indication of resource blocks within a set of assigned multiple time-frequency resources to be used for transmission of SRS at the UE, wherein the obtained SRS occupies a first portion of the indicated resource blocks, and the obtained data signal occupies a second portion of the indicated resource blocks.

[0038] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for the following actions: estimating a channel for wireless communication between a UE and a network entity based on the obtained SRS, identifying a location of the UE based on the SRS, and sensing an environment associated with the UE based on the obtained SRS.

[0039] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, sensing an environment associated with a UE may include operations, features, components, or instructions for the following actions: using multiple-input and multiple-output (MIMO) radar to sense an environment associated with the UE.

[0040] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, a data signal includes a PUCCH signal or a PUSCH signal.

[0041] A method for wireless communication at a network entity is described. The method may include outputting, to a UE, a configuration for multiplexing a set of multiple reference signals in a Doppler domain; outputting, to the UE, an assignment of a set of multiple time-frequency resources for transmission of the set of multiple reference signals; and obtaining, from the UE, the set of multiple reference signals, wherein the obtained set of multiple reference signals is multiplexed across the assigned set of multiple time-frequency resources according to the output configuration.

[0042] An apparatus for wireless communication at a network entity is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to output, to a UE, a configuration for multiplexing a set of multiple reference signals in a Doppler domain; output, to the UE, an assignment of a set of multiple time-frequency resources for transmission of the set of multiple reference signals; and obtain, from the UE, the set of multiple reference signals, wherein the obtained set of multiple reference signals is multiplexed across the assigned set of multiple time-frequency resources according to the output configuration.

[0043] Another apparatus for wireless communication at a network entity is described. The apparatus may include components for outputting, to a UE, a configuration for multiplexing a set of multiple reference signals in a Doppler domain; components for outputting, to the UE, an assignment of a set of multiple time-frequency resources for transmission of the set of multiple reference signals; and components for obtaining, from the UE, the set of multiple reference signals, wherein the obtained set of multiple reference signals is multiplexed across the assigned set of multiple time-frequency resources according to the output configuration.

[0044] A non-transitory computer-readable medium storing code for wireless communication at a network entity is described. The code may include instructions executable by a processor to perform the following operations: outputting, to a UE, a configuration for multiplexing a set of multiple reference signals in a Doppler domain; outputting, to the UE, an assignment of a set of multiple time-frequency resources for transmission of the set of multiple reference signals; and obtaining, from the UE, the set of multiple reference signals, wherein the obtained set of multiple reference signals is multiplexed across the assigned set of multiple time-frequency resources according to the output configuration.

[0045] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, an indication of a set of multiple phase codes for multiplexing a set of multiple reference signals is output to a UE, where each of the obtained reference signals in the obtained set of multiple reference signals can be multiplexed using a corresponding phase code in the indicated set of multiple phase codes.

[0046] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, each phase code in the set of multiple phase codes corresponds to a respective antenna port in a set of multiple antenna ports at the UE and a respective symbol within a set of assigned multiple time-frequency resources.

[0047] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may further include operations, features, components, or instructions for the following actions: estimating a channel for wireless communication between a UE and a network entity; sensing an environment associated with the UE; and identifying a location of the UE.

[0048] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the set of multiple reference signals includes SRS, PRS, or sensing reference signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figures 1 to 3 Each illustrates an example of a wireless communication system supporting techniques for enhanced sounding reference signal (SRS) multiplexing in accordance with various aspects of the present disclosure.

[0050] Figure 4A and Figure 4B Illustrates an example of a timing diagram supporting techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure.

[0051] Figure 5 and Figure 6 Each illustrates an example of a process flow supporting techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure.

[0052] Figure 7 and Figure 8 Shows a block diagram of a device supporting techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure.

[0053] Figure 9 Shows a block diagram of a communication manager supporting techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure.

[0054] Figure 10 Shows a diagram of a system including a device supporting techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure.

[0055] Figure 11 and Figure 12 shows a block diagram of a device supporting techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure.

[0056] Figure 13 shows a block diagram of a communication manager supporting techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure.

[0057] Figure 14 shows a diagram of a system including a device supporting techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure.

[0058] Figures 15 to 18 shows a flowchart illustrating a method supporting techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure. Detailed Description

[0059] A wireless multi - access communication system may include one or more network entities, each of which simultaneously supports the communication of multiple communication devices, which may also be referred to as user equipment (UE). For example, a wireless communication system may be configured to support multiple - input multiple - output (MIMO) at various radio frequency spectrum bands to achieve increased throughput within the communication system. In some examples, MIMO communication may be performed via beamforming using multiple antennas at a transmitting device (e.g., a network entity, UE) and multiple antennas at a receiving device (e.g., a network entity, UE). For example, a network entity may apply beamforming to generate a beam in a spatial direction associated with a UE. In some examples of beamforming, a network entity may apply signal - processing techniques to select, shape, or control a directional beam along the spatial path between the network entity and the UE. The spatial path of the generated beam may depend on a set of parameters applied at the network entity. For example, a network entity may determine a set of parameters to be used for beamforming communication with a UE based on a channel - estimation process performed at the network entity using a reference signal (e.g., an uplink reference signal) transmitted from the UE.

[0060] However, in some examples, a UE may be associated with one or more power constraints, which may result in reduced uplink coverage. For example, the power constraint associated with the UE may reduce the distance (e.g., propagation distance, transmission range) that a signal transmitted from the UE can travel while maintaining an appropriate power. Additionally or alternatively, some UEs may become relatively more power-constrained for wireless communications using relatively high radio frequency spectrum bands. In some examples, the reduced uplink coverage may result in reduced channel estimation at a network entity. That is, the channel estimation performed at the network entity using reference signals transmitted from a power-constrained UE may be reduced regardless of the quality of the communication channel used for the transmission of the reference signals. In some examples, to improve uplink coverage, the UE may increase the duration used for the transmission of the reference signals. However, in such examples, using an increased duration to transmit the reference signals may result in an increased number of time domain resources being used at the UE and thus result in increased overhead. Additionally, the UE may be configured to time-division multiplex (TDM) the reference signals with data signals. In such an example, as the number of time domain resources used at the UE for the transmission of the reference signals increases, the number of time domain resources available for the transmission of the data signals may decrease, which may result in a reduced throughput within the communication system.

[0061] Aspects of the present disclosure relate to techniques for enhancing sounding reference signal (SRS) multiplexing. For example, to reduce the overhead associated with the transmission of reference signals such as SRS, a UE may multiplex the reference signals with data signals in the time domain and the frequency domain. In some examples, the UE may use rate matching to multiplex the reference signals. For example, the UE may rate match the data signals around the reference signals. Additionally or alternatively, the UE may use a comb pattern that can be interleaved in the frequency domain across multiple time domain resources to multiplex the reference signals. For example, the UE may apply a frequency domain offset to the comb pattern such that the comb pattern can be interleaved across the time domain resources. In some examples, the UE may apply orthogonal cover codes to the reference signals and the data signals such that the UE can use the same time domain resources to transmit the reference signals and the data signals. Additionally or alternatively, the UE may multiplex the reference signals with data signals and one or more other types of reference signals. In some examples, the UE may use a set of frequency domain resources configured at the UE for the transmission of the reference signals to transmit the reference signals and the data signals.

[0062] In some other examples, to reduce the overhead associated with the transmission of reference signals, a UE may multiplex multiple reference signals in the Doppler domain. For example, the UE may apply multiple (e.g., different) phase codes to multiple (e.g., different) reference signals transmitted across multiple (e.g., different) antenna ports such that the UE may use the same time-domain resources to transmit multiple reference signals using multiple antenna ports. In such examples, the respective phase codes applied to the reference signals may be based on the antenna ports used to transmit the reference signals and the time-domain resources during which the reference signals may be transmitted.

[0063] Aspects of the subject matter described herein may be implemented to achieve one or more potential advantages. For example, the techniques employed by the described communication devices may provide benefits and enhancements to the operation, channel estimation, sensing, and positioning of the communication devices. For example, the operations performed by the described communication devices may provide increased uplink coverage, which may result in improved channel estimation at a network entity. In some particular implementations, the operations performed by the described communication devices to increase uplink coverage include multiplexing reference signals with data signals in the time domain and the frequency domain (e.g., in time and in frequency), or multiplexing multiple reference signals in the Doppler domain, or both. In some other particular implementations, the operations performed by the described communication devices may also support other benefits such as reduced power consumption, increased throughput, and improved data rates.

[0064] Aspects of the present disclosure are first described in the context of a wireless communication system. Aspects of the present disclosure are also described in the context of timing diagrams and process flows. Aspects of the present disclosure are further illustrated by apparatus diagrams, system diagrams, and flowcharts relating to techniques for enhancing SRS multiplexing, and aspects of the present disclosure are described with reference to these diagrams.

[0065] Figure 1 An example of a wireless communication system 100 that supports techniques for enhancing SRS multiplexing in accordance with various aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more network entities in a network entity 105, one or more UEs in a UE 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating according to other systems and radio technologies including future systems and radio technologies not explicitly mentioned herein.

[0066] Network entity 105 can be dispersed throughout a geographical area to form a wireless communication system 100 and can include devices in different forms or with different capabilities. In various examples, network entity 105 can be referred to as a network element, a mobility element, a radio access network (RAN) node, or network equipment, among other designations. In some examples, network entity 105 and UE 115 can communicate wirelessly via one or more of the communication links 125 (e.g., radio frequency access links). For example, network entity 105 can support a coverage area 110 (e.g., a geographical coverage area) within which UE 115 and network entity 105 can establish one or more of the communication links 125. Coverage area 110 can be an example of a geographical area within which network entity 105 and UE 115 can support signal communication according to one or more radio access technologies (RATs).

[0067] UE 115 can be dispersed throughout the coverage area 110 of wireless communication system 100, and each UE 115 can be stationary or mobile, or stationary and mobile at different times. UE 115 can be a device in different forms or with different capabilities. Figure 1 Some examples of UE 115 are illustrated. UE 115 described herein can be capable of supporting communication with various types of devices (such as other types of UE 115 or network entity 105 as Figure 1 shown).

[0068] As described herein, a node of the wireless communication system 100 (which may be referred to as a network node or a wireless node) can be a network entity 105 (e.g., any network entity described herein), a UE 115 (e.g., any UE described herein), a network controller, a device, an equipment, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, the node can be a UE 115. As another example, the node can be a network entity 105. As yet another example, a first node can be configured to communicate with a second node or a third node. In one aspect of this example, the first node can be a UE 115, the second node can be a network entity 105, and the third node can be a UE 115. In another aspect of this example, the first node can be a UE 115, the second node can be a network entity 105, and the third node can be a network entity 105. In other aspects of this example, the first node, the second node, and the third node can be different from these examples. Similarly, references to UE 115, network entity 105, device, equipment, computing system, etc. can include the disclosure of UE 115, network entity 105, device, equipment, computing system, etc. as nodes. For example, the disclosure that UE 115 is configured to receive information from network entity 105 also discloses that a first node is configured to receive information from a second node.

[0069] In some examples, network entity 105 can communicate with core network 130, or with each other, or both. For example, network entity 105 can communicate with core network 130 via one or more backhaul communication links 120 (e.g., according to S1, N2, N3, or other interface protocols). In some examples, network entity 105 can communicate with each other directly (e.g., directly between network entities 105) or indirectly (e.g., via core network 130) via backhaul communication links 120 (e.g., according to X2, Xn, or other interface protocols). In some examples, network entity 105 can communicate with each other via midhaul communication link 162 (e.g., according to midhaul interface protocol) or fronthaul communication link 168 (e.g., according to fronthaul interface protocol) or any combination thereof. Backhaul communication link 120, midhaul communication link 162, or fronthaul communication link 168 can be or include one or more wired links (e.g., electrical link, optical fiber link), one or more wireless links (e.g., radio link, wireless optical link), etc. or various combinations thereof. UE 115 can communicate with core network 130 via communication link 155.

[0070] One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., transceiver base station, radio base station, NR base station, access point, radio transceiver, Node B, eNodeB (eNB), next-generation Node B or gigabit Node B (either of which may be referred to as a gNB), 5G NB, next-generation eNB (ng-eNB), home Node B, home eNodeB, or other suitable terms). In some examples, the network entity 105 (e.g., base station 140) may be implemented in an integrated (e.g., monolithic, stand-alone) base station architecture that may be configured to utilize a protocol stack physically or logically integrated within the network entity 105 (e.g., a single RAN node, such as base station 140).

[0071] In some examples, the network entity 105 may be implemented in a disaggregated architecture (e.g., disaggregated base station architecture, disaggregated RAN architecture) that may be configured to utilize a protocol stack physically or logically distributed among two or more network entities within the network entity 105 (such as an integrated access backhaul (IAB) network, open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance), or virtualized RAN (vRAN) (e.g., cloud RAN (C-RAN))). For example, the network entity 105 may include one or more of the following: a central unit (CU) (e.g., CU 160), a distributed unit (DU) (e.g., DU 165), a radio unit (RU) (e.g., RU 170), a RAN intelligent controller (RIC) (e.g., near real-time RIC (near-RTRIC), non-real-time RIC (non-RT RIC)), a service management and orchestration (SMO) (e.g., SMO 180) system, or any combination thereof. For example, the network entity 105 may include one or more of CU 160, DU 165, RU 170, RIC 175, and SMO 180. The RU 170 may also be referred to as a radio head, intelligent radio head, remote radio head (RRH), remote radio unit (RRU), or transmit receive point (TRP). One or more components of the network entity 105 in a disaggregated RAN architecture may be co-located, or one or more components of the network entity 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more of the network entities in the network entity 105 of a disaggregated RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0072] The functional split between the CU 160, DU 165, and RU 170 is flexible and can support different functions, depending on which functions are performed at the CU 160, DU 165, or RU 170 (e.g., network layer functions, protocol layer functions, baseband functions, radio frequency functions, and any combination thereof). For example, a functional split of the protocol stack can be employed between the CU 160 and the DU 165 such that the CU 160 can support one or more layers of the protocol stack and the DU 165 can support one or more different layers of the protocol stack. In some examples, the CU 160 can host higher protocol layer (e.g., layer 3 (L3), layer 2 (L2)) functions and signaling (e.g., radio resource control (RRC), service data adaptation protocol (SDAP), packet data convergence protocol (PDCP)). The CU 160 can be connected to one or more of the DU 165 or RU 170, and one or more of the DU 165 or RU 170 can host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, media access control (MAC) layer) functions and signaling, and can each be at least partially controlled by the CU 160. Additionally or alternatively, a functional split of the protocol stack can be employed between the DU 165 and the RU 170 such that the DU 165 can support one or more layers of the protocol stack and the RU 170 can support one or more different layers of the protocol stack. The DU 165 can support one or more different cells (e.g., via one or more RU 170). In some cases, the functional split between the CU 160 and the DU 165 or between the DU 165 and the RU 170 can be within a protocol layer (e.g., some functions of a protocol layer can be performed by one of the CU 160, DU 165, or RU 170, while other functions of that protocol layer are performed by a different one of the CU 160, DU 165, or RU 170). The CU 160 can be further functionally split into a CU control plane (CU-CP) and a CU user plane (CU-UP) function. The CU 160 can be connected to one or more DUs in the DU 165 via an intermediate transport communication link 162 (e.g., F1, F1-c, F1-u), and the DU 165 can be connected to one or more RU 170 via a fronthaul communication link 168 (e.g., open fronthaul (FH) interface). In some examples, the intermediate transport communication link 162 or the fronthaul communication link 168 can be implemented according to the interfaces (e.g., channels) between the layers of the protocol stack, which are supported by the corresponding network entities (e.g., network entity 105) communicating via these communication links.

[0073] In some wireless communication systems (e.g., wireless communication system 100), the infrastructure and spectrum resources for radio access may support wireless backhaul link capabilities to supplement the wired backhaul connection, thereby providing an IAB network architecture (e.g., to the core network 130). In some cases, in an IAB network, one or more of the network entities 105 (e.g., IAB node 104) may be partially controlled by each other. One or more of the IAB nodes 104 may be referred to as donor entities or IAB donors. One or more of the DUs 165 or one or more of the RUs 170 may be partially controlled by one or more of the CUs in the CU 160 associated with a donor network entity (e.g., network entity 105), such as a donor base station (e.g., base station 140). One or more donor network entities (e.g., one or more of the network entities 105, IAB donors) may communicate with additional one or more of the network entities 105 (e.g., IAB nodes 104) via the supported access and backhaul links (e.g., backhaul communication link 120). The IAB node 104 may include an IAB mobile terminal (IAB-MT) controlled (e.g., scheduled) by the DU 165 of the coupled IAB donor. The IAB-MT may include a separate antenna set for relaying communication with the UE 115, or may share the same antenna (e.g., of the RU 170) of the IAB node 104 for access via the DU 165 of the IAB node 104 (e.g., referred to as a virtual IAB-MT (vIAB-MT)). In some examples, the IAB node 104 may include a DU 165 that supports communication links with additional entities (e.g., IAB node 104, UE 115) within a relay chain or configuration (e.g., downstream) of the access network. In such cases, one or more components of the split RAN architecture (e.g., one or more of the IAB nodes 104, or components of the IAB node 104) may be configured to operate according to the techniques described herein.

[0074] In the context where the techniques described herein are applied to the split RAN architecture, one or more components of the split RAN architecture may be configured to support the techniques for enhanced SRS multiplexing as described herein. For example, some of the operations described as being performed by the UE 115 or the network entity 105 (e.g., base station 140) may additionally or alternatively be performed by one or more components of the split RAN architecture (e.g., IAB node 104, DU 165, CU 160, RU 170, RIC 175, SMO 180).

[0075] The UE 115 may include or may be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or some other suitable term, where the "device" may also be referred to as a unit, station, terminal, or client, etc. The UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, the UE 115 may include or may be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine type communication (MTC) device, etc., which may be implemented in various objects such as appliances, vehicles, meters, etc.

[0076] The UE 115 described herein may be capable of communicating with various types of devices, such as other types of UE 115 that may sometimes act as relays, and network entities 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, etc., as Figure 1 shown.

[0077] The UE 115 and the network entity 105 may wirelessly communicate with each other via one or more communication links (e.g., access links) among the communication links 125 associated with one or more carriers. The term "carrier" may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion (e.g., bandwidth part (BWP)) of a radio frequency spectrum band operating according to one or more physical layer channels of a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operation, user data, or other signaling. The wireless communication system 100 may support communication with the UE 115 using carrier aggregation or multi-carrier operation. According to a carrier aggregation configuration, the UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used for both frequency division duplex (FDD) and time division duplex (TDD) component carriers. Communication between the network entity 105 and other devices may refer to communication between these devices and any part (e.g., entity, sub-entity) of the network entity 105. For example, the terms "transmit", "receive", or "communicate" when referring to the network entity 105 may refer to any part of the network entity 105 of the RAN (e.g., base station 140, CU 160, DU 165, RU 170) communicating with another device (e.g., directly or via one or more other network entities in the network entity 105).

[0078] The communication link 125 shown in the wireless communication system 100 may include a downlink transmission (e.g., forward link transmission) from the network entity 105 to the UE 115, an uplink transmission (e.g., reverse link transmission) from the UE 115 to the network entity 105, or both, as well as other transmission configurations. A carrier may carry downlink communication or uplink communication (e.g., in FDD mode), or may be configured to carry both downlink communication and uplink communication (e.g., in TDD mode).

[0079] The signal waveform transmitted via a carrier may include a plurality of subcarriers (e.g., using a multicarrier modulation (MCM) technique such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing an MCM technique, a resource element may refer to the resource of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, in which case the symbol period and the subcarrier spacing may be inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the decoding rate of the modulation scheme, or both), such that a relatively large number of resource elements (e.g., during the transmission duration) and a relatively high-order modulation scheme may correspond to a relatively high communication rate. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers, beams), and the use of multiple spatial resources may increase the data rate or data integrity of communicating with the UE 115.

[0080] The time interval for the network entity 105 or the UE 115 can be expressed as a multiple of a basic time unit, which may refer to, for example, the sampling period T s = 1 / (Δf max ·N f ) seconds, where Δf max may represent the supported subcarrier spacing, and N f may represent the supported discrete Fourier transform (DFT) size. The time interval of the communication resources may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0081] Each frame may include a plurality of consecutively numbered sub - frames or time slots, and each sub - frame or time slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into sub - frames, and each sub - frame may be further divided into a certain number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the sub - carrier spacing. Each time slot may include a certain number of symbol periods (e.g., depending on the length of the cyclic prefix appended to each symbol period). In some examples of the wireless communication system 100, a time slot may be further divided into a plurality of mini - slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., N f

[0082]

[0083]

[0084] sub - frames, time slots, mini - slots, or symbols may be the smallest scheduling units (e.g., in the time domain) of the wireless communication system 100 and may be referred to as transmission time intervals (TTIs). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in a burst of shortened TTIs (sTTIs)).Physical channels may be multiplexed according to various techniques for communication using a carrier. Physical control channels and physical data channels may be signaled via a downlink carrier using, for example, one or more of time - division multiplexing (TDM) techniques, frequency - division multiplexing (FDM) techniques, or hybrid TDM - FDM techniques. The control region of a physical control channel (e.g., a control resource set (CORESET)) may be defined by a set of symbol periods and may extend across the system bandwidth of a carrier or a subset of that system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more of the UEs 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level of a control channel candidate may refer to the amount of control channel resources (e.g., control channel elements (CCEs)) associated with the coded information for a control information format with a given payload size. The set of search spaces may include a common search space set configured to transmit control information to a plurality of UEs 115 and a UE - specific search space set for transmitting control information to a specific (e.g., UE115).​In some examples, the network entity 105 (e.g., base station 140, RU 170) can be movable and thus provide communication coverage for a moving coverage area (e.g., coverage area 110). In some examples, different coverage areas (e.g., coverage area 110) associated with different technologies can overlap, but the different coverage areas can be supported by the same network entity (e.g., network entity 105). In some other examples, overlapping coverage areas (e.g., potentially overlapping coverage area 110) associated with different technologies can be supported by different network entities in network entity 105. The wireless communication system 100 can include, for example, a heterogeneous network in which different types of network entities 105 use the same or different radio access technologies to provide coverage for various coverage areas 110.

[0085] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC). The UE 115 can be designed to support ultra-reliable or low-latency or critical functions. Ultra-reliable communication can include private communication or group communication and can be supported by one or more services such as push-to-talk, video, or data. Support for ultra-reliable, low-latency functions can include prioritization of services, and such services can be used for public safety or commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency can be used interchangeably herein.

[0086] In some examples, the UE 115 can be configured to communicate directly with other UEs in the UE 115 via a device-to-device (D2D) communication link 135 (e.g., according to a peer-to-peer (P2P), D2D, or sidelink protocol). In some examples, one or more UEs in the UE 115 that are performing D2D communication in a group can be within the coverage area 110 of a network entity 105 (e.g., base station 140, RU 170), and the network entity can support aspects of such D2D communication configured (e.g., scheduled) by the network entity 105. In some examples, one or more UEs in the UE 115 in such a group can be outside the coverage area 110 of the network entity 105 or can otherwise be unable or not configured to receive transmissions from the network entity 105. In some examples, a group of UEs 115 communicating via D2D communication can support a one-to-many (1:M) system, where each UE 115 transmits to each of the other UEs (e.g., UE 115) in the group. In some examples, the network entity 105 can facilitate the scheduling of resources for D2D communication. In some other examples, D2D communication can be performed between UEs 115 without involving the network entity 105.

[0087] The core network 130 can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 can be an evolved packet core (EPC) or a 5G core (5GC), which can include at least one control plane entity for managing access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity for routing packets or interconnecting to external networks (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity can manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of the UE 115 served by a network entity 105 (e.g., a base station 140) associated with the core network 130. User IP packets can be transmitted through the user plane entity, which can provide IP address allocation and other functions. The user plane entity can be connected to the IP services 150 of one or more network operators. The IP services 150 can include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or packet switched streaming services.

[0088] The wireless communication system 100 can operate using one or more radio frequency spectrum bands that can be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). The region from 300 MHz to 3 GHz is called the ultra-high frequency (UHF) region or the decimeter band because the wavelength range is approximately from 1 decimeter to 1 meter. UHF waves can be blocked or redirected by buildings and environmental features (which can be referred to as clutter), but these waves can be sufficient to penetrate structures so that macrocells can serve UEs 115 located indoors. Compared to communications using smaller frequencies and longer wavelengths in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz, communications using UHF waves can be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers).

[0089] The wireless communication system 100 can utilize both licensed radio frequency spectrum bands and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 can adopt licensed-assisted access (LAA), unlicensed radio frequency spectrum band radio access technology, or NR technology that uses unlicensed radio frequency spectrum bands such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating using an unlicensed radio frequency spectrum band, devices such as network entity 105 and UE 115 can adopt carrier sensing for collision detection and avoidance. In some examples, operations using an unlicensed radio frequency spectrum band can be combined with component carriers operating using a licensed radio frequency spectrum band based on a carrier aggregation configuration (e.g., LAA). Operations using an unlicensed radio frequency spectrum band can include downlink transmissions, uplink transmissions, P2P transmissions, D2D transmissions, and so on.

[0090] The network entity 105 (e.g., base station 140, RU 170) or UE 115 can be equipped with multiple antennas, which can be used to adopt techniques such as transmit diversity, receive diversity, MIMO communication, or beamforming. The antennas of the network entity 105 or UE 115 can be located within one or more antenna arrays or antenna panels, which can support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays can be co-located at an antenna assembly, such as an antenna tower. In some examples, the antennas or antenna arrays associated with the network entity 105 can be located at different geographical locations. The network entity 105 can include an antenna array having a set of antenna ports arranged in multiple rows and columns that the network entity 105 can use to support beamforming for communication with the UE 115. Similarly, the UE 115 can include one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel can support radio frequency beamforming for signals transmitted via the antenna ports.

[0091] The network entity 105 or the UE 115 can use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques can be referred to as spatial multiplexing. The multiple signals can be transmitted, for example, by a transmitting device via different antennas or different combinations of antennas. Similarly, the multiple signals can be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals can be referred to as an individual spatial stream and can carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers can be associated with different antenna ports for channel measurement and reporting. MIMO techniques include: single-user MIMO (SU-MIMO), for which multiple spatial layers are transmitted to the same receiving device; and multi-user MIMO (MU-MIMO), for which multiple spatial layers are transmitted to multiple devices.

[0092] Beamforming (which can also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., the network entity 105, the UE 115) to shape or control an antenna beam (e.g., a transmitting beam, a receiving beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining signals conveyed via the antenna elements of an antenna array such that some signals propagating in some directions relative to the antenna array experience constructive interference while other signals experience destructive interference. The adjustment of the signals conveyed via the antenna elements can include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to the signals carried via the antenna elements associated with the device. The adjustment associated with each antenna element can be defined by a set of beamforming weights associated with an orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0093] The network entity 105 or the UE 115 may use beam scanning techniques as part of beamforming operations. For example, the network entity 105 (e.g., the base station 140, the RU 170) may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be sent multiple times by the network entity 105 in different directions. For example, the network entity 105 may send signals according to different sets of beamforming weights associated with different transmission directions. The transmissions along different beam directions may be used to identify (e.g., by the transmitting device such as the network entity 105, or by the receiving device such as the UE 115)) the beam directions for later transmission or reception by the network entity 105.

[0094] Some signals (such as data signals associated with the receiving device) may be sent by the transmitting device (e.g., the transmitting network entity, the transmitting UE) along a single beam direction (e.g., the direction associated with a receiving device such as the receiving network entity or the receiving UE). In some examples, the beam direction associated with the transmission along a single beam direction may be determined based on the signals transmitted along one or more beam directions. For example, the UE 115 may receive one or more of the signals transmitted by the network entity 105 in different directions and may report to the network entity 105 an indication of the signal that the UE 115 receives with the highest signal quality or other acceptable signal quality.

[0095] In some examples, transmissions performed by a device (e.g., by network entity 105 or UE 115) can be carried out using multiple beam directions, and the device can use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from network entity 105 to UE 115). UE 115 can report feedback indicating precoding weights for one or more beam directions, and the feedback can correspond to a configured set of beams across the system bandwidth or one or more subbands. Network entity 105 can transmit reference signals (e.g., cell-specific reference signal (CRS), channel state information reference signal (CSI-RS)), which can be precoded or not precoded. UE 115 can provide feedback for beam selection, which can be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., multi-panel type codebook, linear combination type codebook, port selection type codebook). Although these techniques are described with reference to signals transmitted by network entity 105 (e.g., base station 140, RU 170) in one or more directions, UE 115 can use similar techniques for transmitting signals multiple times in different directions (e.g., for identifying beam directions used by UE 115 for subsequent transmission or reception), or for transmitting signals in a single direction (e.g., for transmitting data to a receiving device).

[0096] A receiving device (e.g., UE 115) can perform receiving operations according to multiple receiving configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from a transmitting device (e.g., network entity 105). For example, the receiving device can perform receiving according to multiple receiving directions by: receiving via different antenna subarrays, processing the received signals according to different antenna subarrays, receiving according to different sets of receive beamforming weights (e.g., different directional listening weight sets) applied to the signals received at multiple antenna elements of the antenna array, or processing the received signals according to different sets of receive beamforming weights applied to the signals received at multiple antenna elements of the antenna array, where any of these can refer to "listening" according to different receiving configurations or receiving directions. In some examples, the receiving device can use a single receiving configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receiving configuration can be aligned along a beam direction determined based on listening according to different receiving configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0097] The wireless communication system 100 may support a framework for multiplexing reference signals. For example, the UE 115 may receive from the network entity 105 a configuration for multiplexing the SRS with data signals in the time domain and the frequency domain (e.g., in time and frequency). In such an example, the UE 115 may receive from the network entity 105 an assignment of multiple time-frequency resources for the transmission of the SRS. In response, the UE 115 may multiplex the SRS with data signals across the assigned time-frequency resources according to the received configuration and send the multiplexed SRS to the network entity.

[0098] In some other examples, the UE 115 may receive from the network entity 105 a configuration for multiplexing multiple reference signals in the Doppler domain. In such examples, the UE 115 may receive an assignment of multiple time-frequency resources for the transmission of multiple reference signals. In response, the UE 115 may multiplex the multiple reference signals across the assigned time-frequency resources according to the received configuration and send the multiplexed reference signals to the network entity 105.

[0099] Figure 2 An example of a wireless communication system 200 that supports techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure is illustrated. In some examples, the wireless communication system 200 may implement one or more aspects of the wireless communication system 100 or may be implemented at the one or more aspects. For example, the wireless communication system 200 may include a UE 215, which may be an example of the UE 115 as described in reference Figure 1 The wireless communication system 200 may also include a network entity 205, which may be an example of one or more of the network entities 105 as described in reference Figure 1 (e.g., a CU, a DU, an RU, a base station, an IAB node, or one or more other network nodes). The network entity 205 and the UE 215 may communicate using a downlink 220 and an uplink 240, which may each be an example of the communication link 125 as described in reference Figure 1 In an example of Figure 2 , the UE 215 and the network entity 205 may communicate within a coverage area 210, which may be an example of the coverage area 110 as described in reference Figure 1 The wireless communication system 200 may include features for improving communication between the network entity 205 and the UE 215, as well as other possible benefits.

[0100] In some examples of a wireless communication system 200 (e.g., a cellular system), uplink communication can be coverage - constrained (e.g., can be the bottom - line of coverage), for example due to power constraints associated with UE 215. Additionally or alternatively, UE 215 can become relatively more power - constrained to support relatively high - frequency band operation, which can occur in some deployments (e.g., sixth - generation (6G) deployments). For such scenarios, UE 215 can determine the quality of an enhanced reference signal (e.g., SRS sounding quality) to achieve relatively high - throughput communication. For example, network entity 205 can use (e.g., rely on) channel estimation using SRS (e.g., sent from UE 215) to achieve relatively high uplink or downlink throughput using MIMO (e.g., massive MIMO) beamforming. However, in some examples, if the quality of the SRS is relatively poor due to power constraints associated with UE 215, the channel estimation performed at network entity 205 using the SRS can be reduced. In some examples, to improve uplink coverage, UE 215 can send the SRS over an increased (e.g., relatively long) time duration. However, in such examples, SRS transmission using an increased time duration can lead to increased consumption of uplink resources (e.g., time - frequency resources allocated for uplink transmission). Additionally or alternatively, for some cellular systems (e.g., NR systems), UE 215 can use TDM to multiplex the SRS and data channels or control channels. Additionally or alternatively, UE 215 and network entity 205 may lack a mechanism for non - transparent multiplexing. That is, from the perspective of UE 215 and network entity 205, the cellular system may not support a design that enables non - transparent multiplexing.

[0101] In some examples, techniques for enhanced SRS multiplexing as described herein can support some designs for enhanced SRS multiplexing. As Figure 2 illustrated in the example of, UE 215 can receive a multiplexing configuration 225 from network entity 205. In some examples, multiplexing configuration 225 can correspond to a configuration for multiplexing a reference signal 250 with a data signal in the time domain and frequency domain (e.g., in time and frequency). In such examples, UE 215 can receive a resource assignment 230 for multiple time - frequency resources for the transmission of reference signal 250. In response, UE 215 can use a multiplexing scheme 245 to multiplex the reference signal 250 with the data signal across the assigned time - frequency resources according to the received configuration. Additionally or alternatively, UE 215 can send the multiplexed reference signal (e.g., reference signal 250) to network entity 205.

[0102] In some other examples, the multiplexing configuration 225 may correspond to a configuration for multiplexing multiple reference signals 250 in the Doppler domain. In such examples, the UE 215 may receive a resource assignment 230, which may indicate an assignment of multiple time-frequency resources for the transmission of the reference signals 250. The UE 215 may use the multiplexing scheme 245 to multiplex multiple reference signals 250 across the assigned time-frequency resources according to the received configuration. Additionally or alternatively, the UE 215 may send the multiplexed reference signals (e.g., reference signal 250) to the network entity 205. In some examples, the reference signal 250 may include one or more SRSs, positioning reference signals, or sensing reference signals. Thus, the network entity 205 may use one or more received reference signals for channel sounding (e.g., channel estimation, estimating one or more characteristics associated with the communication channel used for communication between the UE 215 and the network entity 205), identifying the location of the UE 215, or performing radar sensing (e.g., MIMO radar sensing, sensing the environment associated with (e.g., surrounding) the UE 215 or the network entity 205). In some examples, multiplexing one or more of the reference signals 250 according to the multiplexing configuration 225 may result in increased uplink coverage and other possible benefits.

[0103] Figure 3 An example of a wireless communication system 300 supporting techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure is illustrated. In some examples, the wireless communication system 300 may implement or be implemented at one or more aspects of the wireless communication system 100 or the wireless communication system 200. For example, the wireless communication system 300 may include a UE 315, which may be an example of a UE as described in reference Figure 1 and Figure 2 The wireless communication system 300 may further include a network entity 305, which may be an example of one or more of the network entities (e.g., CU, DU, RU, base station, IAB node, or one or more other network nodes) as described in reference Figure 1 and Figure 2 The network entity 305 and the UE 315 may communicate using a downlink 320 and an uplink 340, which may each be an example of a communication link as described in reference Figure 1 and Figure 2 In Figure 3 example, the UE 315 and the network entity 305 may communicate within a coverage area 310, which may be an example of a coverage area as described in reference Figure 1 and Figure 2Examples of the coverage area described above. The wireless communication system 300 may include features for improving communication between the network entity 305 and the UE 315, as well as other possible benefits.

[0104] In some examples, the wireless communication system 300 may be an example of an NR system. In such examples, SRS and data channels or control channels may be TDM multiplexed (e.g., from the perspective of the UE 315 and the network entity 305, the wireless communication system 300 may not support a design that enables non-transparent multiplexing). In such examples, as the number of time-domain resources for transmitting one or more SRSs at the UE 315 increases, the number of time-domain resources available for transmitting data channels or control channels (e.g., signals transmitted using data channels or control channels) may decrease, which may result in a reduction in throughput within the wireless communication system 300. Additionally or alternatively, in such examples, the wireless communication system 300 may support the use of a comb pattern (e.g., comb-2 and comb-4 comb patterns) for transmitting some SRSs (e.g., SRSs for operations other than positioning) without multi-symbol interleaving. That is, the wireless communication system 300 may support the use of a comb pattern for SRS transmission without interleaving the comb pattern across multiple time-domain resources. For example, the UE 315 may transmit an SRS where the SRS occupies 1, 2, or 4 consecutive symbols in a time slot, which may be within the relatively last 6 symbols of the time slot. In such examples, if more than one antenna port is used for transmitting the SRS in the same OFDM symbol, the SRS may be on the same comb offset and use cyclic shifts (e.g., equally spaced cyclic shifts). In some examples, the separation may depend on the number of antenna ports. Although time slots and symbols are mentioned throughout the disclosure, it should be understood that the techniques described herein may also be applied to other types of time-domain resources, which may include other time durations.

[0105] In some examples, the techniques for enhancing SRS multiplexing as described herein may provide reduced overhead associated with SRS transmission at the UE 315 and increased channel estimation at the network entity 305 using the SRS. For example, such techniques may enable rate matching of data channels (e.g., Physical Uplink Shared Channel (PUSCH)) and control channels (e.g., Physical Uplink Control Channel (PUCCH)) around the SRS. That is, some of the techniques for enhancing SRS multiplexing as described herein may enable the UE 315 to rate match signals transmitted using the PUSCH (e.g., PUSCH signals) or signals transmitted using the PUCCH (e.g., PUCCH signals) around the SRS such that the PUSCH signal or PUCCH signal and the SRS may be multiplexed in the frequency domain (e.g., as well as the time domain).

[0106] As Figure 3 illustrated in the example of Figure 3 , the UE 315 may receive a multiplexing configuration 325 from the network entity 305. In some examples, the multiplexing configuration 325 may correspond to a configuration for multiplexing a reference signal 350 with a data signal in the time domain and the frequency domain. In such examples, the UE 315 may receive a resource assignment 330 for a plurality of time-frequency resources for the transmission of the reference signal 350. In some examples, the multiplexing configuration (or another configuration received from the network entity 305) may indicate that the UE 315 rate matches the data signal around the reference signal 350. In response, the UE 315 may rate match the data signal around the reference signal. The UE 315 may multiplex the reference signal 350 with the rate-matched data signal across the assigned time-frequency resources according to the received configuration. Additionally or alternatively, the UE 315 may send the multiplexed reference signal (e.g., reference signal 350) to the network entity 305.

[0107] In some examples, the UE 315 may rate match a PUSCH signal or a PUCCH signal around an SRS transmitted according to a comb pattern (e.g., a comb-X SRS pattern). For example, the UE 315 may rate match a PUSCH signal or a PUCCH signal that may be OFDM around an SRS transmitted according to a comb pattern.

[0108] Additionally or alternatively, in some other examples, the UE 315 may rate match a PUSCH signal or a PUCCH signal that may be DFT-s-OFDM around an SRS transmitted according to a comb pattern. In such examples, the PUSCH or PUCCH and the SRS may be multiplexed in the frequency domain (e.g., and the time domain). That is, the UE 315 may use rate matching to perform FDM on the PUSCH or PUCCH and the SRS. In some examples, the PUSCH signal or the PUCCH signal may occupy a portion of the resources included in the comb pattern. For example, the PUSCH signal or the PUCCH signal may occupy a portion (e.g., 1 / X) of the resources of the comb-X SRS pattern.

[0109] In some examples, the UE 315 may transmit SRS according to a relatively large comb pattern (e.g., relatively large comb size). For example, the UE 315 may use a relatively large comb size SRS (e.g., comb - 8) to reduce the overhead at the UE 315. However, in some examples, the relatively large comb size may affect (e.g., negatively affect) the delay spread resolution associated with the SRS. In such examples, the UE 315 may use multi - symbol time - domain interleaving. For example, the UE 315 may map the reference signal 350 (e.g., SRS) to a resource set 355, which may include time - domain resources (e.g., symbols) indexed from 0 to 13 and frequency - domain resources (e.g., sub - carriers) indexed from 0 to 11. As Figure 3 illustrated in the example of, the SRS comb size may correspond to comb - 8. For example, the UE 315 may map the reference signal 350 (e.g., SRS) to the resource set 355 according to a comb - 8 comb pattern with 4 symbols (e.g., across symbol indices 2 to 5). That is, the UE 315 may map the reference signal 350 across 4 symbols of the resource set 355 with a periodicity of approximately 8 sub - carriers (e.g., an interval of approximately 7 sub - carriers) in the frequency domain. Additionally or alternatively, the UE 315 may apply an offset in the frequency domain such that the frequency - domain resources (e.g., sub - carriers) occupied by the SRS may change (e.g., may be different) across time - domain resources. For example, the SRS may occupy resource elements with sub - carrier indices 3 and 11 and symbol index 2, sub - carrier index 7 and symbol index 3, sub - carrier index 1 and 9 and symbol index 4, and sub - carrier index 5 and symbol index 5.

[0110] In such examples, network entity 305 may combine symbols in which SRS can be mapped. For example, network entity 305 may combine resource elements with symbol indices 2 to 4 in the time domain. In such an example, after combining 4 symbols (e.g., after deinterleaving), the comb pattern may correspond to (e.g., be equivalent to) a comb-2 comb pattern. That is, the SRS may correspond to a comb-2 SRS. In some other examples, network entity 305 may combine a portion of resource elements with symbol indices 2 to 4 in the time domain. For example, network entity 305 may combine time domain resources with symbol indices 2 and 3 or time domain resources with symbol indices 4 and 5. In such an example, after combining symbol indices 2 and 3 or symbol indices 4 and 5 (e.g., after deinterleaving), the comb pattern may correspond to (e.g., be equivalent to) a comb-4 comb pattern. That is, the SRS may correspond to a comb-4 SRS. In some examples, network entity 305 may use reference signal 350 for channel estimation, positioning, or sensing. In some examples, network entity 305 and UE 315 may use frequency hopping and utilize closed-loop and open-loop power control to support multi-symbol time domain interleaving of SRS for positioning across multiple ports. Additionally or alternatively, UE 315 and network entity 305 may support multi-symbol time domain interleaving of SRS for positioning, where the symbols occupied by the SRS for positioning may overlap (e.g., conflict) with the symbols occupied by PUSCH signals or PUCCH signals.

[0111] Additionally or alternatively, UE 315 may apply orthogonal cover codes to SRS and data channels or control channels that occupy the same resources to reduce SRS overhead. For example, using the same resources and across multiple (e.g., adjacent) symbols, the UE may apply a first cover code (e.g., Walsh cover of {+1, +1, +1, +1}) to the SRS and a second cover code (e.g., Walsh code of {+1, -1, +1, -1}) to the data signal or control signal, such that the data signal or control signal and the SRS can be orthogonal. In such an example, one or more other cover codes (e.g., other Walsh codes) may be assigned to other data or SRS users, e.g., to multiplex signals from multiple users.

[0112] In some examples, the UE 315 may send multiple SRS repetitions such that the network entity 305 may apply interference cancellation based on the SRS repetitions. For example, the SRS for sounding may be repeated over a certain duration and may thus be estimated or measured (e.g., at the network entity 305) over that duration (e.g., using a certain number of symbols). In some examples, after performing channel estimation using the SRS (e.g., after deriving the SRS channel estimate), the network entity 305 may use the SRS channel estimate to perform interference cancellation of the SRS on other symbols (e.g., symbols where the SRS may overlap (e.g., superimpose) with a PUSCH signal or a PUCCH signal). In some examples, the UE 315 may multiplex the SRS with a demodulation reference signal (DMRS), e.g., to orthogonalize the SRS among multiple (e.g., different) users.

[0113] In some examples, the UE 315 (e.g., the SRS sounding user) may use SRS combs to send (e.g., carry) some data, such as PUCCH data (e.g., CSI feedback). In such examples, the data sent from the UE 315 may or may not overlap with other users (e.g., associated with other UEs). In some examples, the UE 315 may use SRS resources to carry both the SRS and data, such as to avoid affecting (e.g., hindering) the throughput associated with each UE (e.g., per-UE throughput) due to channel sounding (e.g., transmission of the SRS). In some examples, multiplexing the SRS with data (e.g., and DMRS) in the time domain and the frequency domain may result in increased uplink coverage and other possible benefits.

[0114] Figure 4A and Figure 4B FIG. 400 illustrates an example of a timing diagram that supports techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure. In some examples, the timing diagram 400 (e.g., timing diagram 400-a and timing diagram 400-b) may be implemented at one or more aspects of the wireless communication system 100, the wireless communication system 200, and the wireless communication system 300. For example, the timing diagram 400 may be implemented at a UE, which may be an example of a UE as referenced Figures 1 to 3 as described. The timing diagram 400 may also be implemented at a network entity, which may be an example of one or more network entities (e.g., a CU, a DU, an RU, a base station, an IAB node, or one or more other network nodes) as referenced Figures 1 to 3 as described. The timing diagram 400 may support features for improving communication between the network entity and the UE and other possible benefits.

[0115] In some examples, such as for an NR system, more than one antenna port may be used to transmit SRS using the same symbol (e.g., the same OFDM symbol). In such examples, the SRS may use the same comb offset and may use cyclic shifts to be separated (e.g., equally separated). In some examples, the separation may depend on the number of antenna ports used at the UE.

[0116] In some other examples, to reduce (or further reduce) SRS overhead, multiple (e.g., different) SRSs may occupy the same resource while maintaining orthogonality via Doppler division multiplexing (DDM). For example, the UE may use a DDM scheme for (e.g., to implement) SRS orthogonality. In some examples, the UE may implement SRS orthogonality via DDM with slow-time phase decoding. For example, the UE may use multiple (e.g., different) phase codes applied across multiple (e.g., different) SRS antenna ports to transmit multiple SRS symbols. That is, the UE may transmit multiple sets of one or more SRSs, where each set of SRSs may be transmitted using one or more corresponding antenna ports. In such an example, the UE may use a corresponding phase code for each SRS included in each set of SRSs.

[0117] As Figure 4A illustrated in the example of, the UE may use one or more first antenna ports to transmit one or more first SRSs in a first SRS 405. For example, the UE may use the first antenna port to transmit first SRS 405-a, first SRS 405-b, and first SRS 405-c. In such an example, response symbols may be used to transmit each of first SRS 405-a, first SRS 405-b, and first SRS 405-c. Additionally or alternatively, the UE may use one or more second antenna ports to transmit one or more second SRSs in a second SRS 410. For example, the UE may use the second antenna port to transmit second SRS 410-a, second SRS 410-b, and second SRS 410-c. In such an example, response symbols may be used to transmit each of second SRS 410-a, second SRS 410-b, and second SRS 410-c. In some examples, the UE may use one or more third antenna ports to transmit one or more third SRSs in a third SRS 415. For example, the UE may use the third antenna port to transmit third SRS 415-a, third SRS 415-b, and third SRS 415-c. In such an example, response symbols may be used to transmit each of third SRS 415-a, third SRS 415-b, and third SRS 415-c.

[0118] In some examples, the same symbol (e.g., and different antenna ports) can be used to transmit SRS from each of multiple sets of SRS. For example, the first SRS 405-a, the second SRS 410-a, and the third SRS 415-a can each use the first symbol for transmission. Additionally or alternatively, the first SRS 405-b, the second SRS 410-b, and the third SRS 415-b can each use the second symbol for transmission, and the first SRS 405-c, the second SRS 410-c, and the third SRS 415-c can each use the third symbol for transmission. That is, as Figure 4B illustrated in the example of Figure 4B , the UE can transmit multiple SRS (e.g., the first SRS 405, the second SRS 410, and the third SRS 415) such that the multiple SRS can overlap in the time domain but not in the Doppler domain.

[0119] In some examples, the SRS can be transmitted sequentially across the first symbol, the second symbol, and the third symbol. For example, the UE can sequentially transmit a certain number (N) of SRS symbols, and each SRS symbol can be multiplexed with a corresponding phase code. In some examples, the corresponding phase code multiplexed with each SRS (e.g., each SRS symbol) can be different for each SRS antenna port. That is, the UE can use multiple (e.g., different) phase codes across multiple (e.g., different) antenna ports. For example, the UE can use multiple (e.g., different) phase codes to transmit the first SRS 405-a, the second SRS 410, and the third SRS 415 across multiple antenna ports. Additionally or alternatively, the UE can use multiple (e.g., different) phase codes to transmit multiple first SRS 405 (or multiple second SRS 410, or multiple third SRS 415) across multiple symbols.

[0120] For example, the UE can multiplex the waveform of each SRS (e.g., each of the first SRS 405, each of the second SRS 410, and each of the third SRS 415) with a corresponding phase code that can be determined at the UE according to Equation 1 below:

[0121]

[0122] where the parameter M can correspond to the corresponding index associated with a certain number (M t number of) SRS (e.g., M = 1, 2,..., M t ), and the parameter N can correspond to the corresponding index associated with the number (N) of symbols used for transmitting the SRS (e.g., n = 1, 2,..., N). In some examples, in order to separate at the receiver h thFor SRS, slow-time Doppler demodulation can be applied to each (e.g., all) range bins corresponding to the same SRS.

[0123] In some examples, the antenna ports used for SRS transmission can be decoded with phases determined according to the following Equation 2:

[0124]

[0125] where each antenna port can be mapped to M t Doppler sub-bands. In some examples, as described herein, techniques for DDM can be used to multiplex SRS, positioning reference signals, and sensing reference signals, etc. Additionally or alternatively, as described herein, techniques for DDM can support increased uplink coverage and other possible benefits.

[0126] Figure 5 Illustrates an example of process flow 500 that supports techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure. In some examples, process flow 500 can implement one or more aspects of wireless communication system 100, wireless communication system 200, wireless communication system 300, and timing diagram 400. For example, process flow 500 can include example operations associated with network entity 505 and UE 515, which can be example devices as referenced Figures 1 to 3 , Figure 4A and Figure 4B described. The operations performed by network entity 505 and UE 515 can support improvements in communication between UE 515 and network entity 505 and other benefits. In the following description of process flow 500, the operations between UE 515 and network entity 505 can occur in an order different from the example order shown. Additionally or alternatively, the operations performed by UE 515 and network entity 505 can be performed in a different order or at different times. Some operations can also be omitted.

[0127] At 520, UE 515 can receive a multiplexing configuration from network entity 505. The multiplexing configuration can be an example of the multiplexing configuration as described throughout the present disclosure (including references Figure 2 and Figure 3 ). For example, the multiplexing configuration can correspond to a configuration for multiplexing reference signals (e.g., SRS) with data signals in the time domain and in the frequency domain.

[0128] At 525, UE 515 can receive a resource assignment for a plurality of time-frequency resources for SRS transmission. The resource assignment can be as described throughout the present disclosure (including references Figure 2)Example of the described resource assignment. For example, UE 515 may use a comb pattern or an offset (or both) to identify resource blocks within multiple time-frequency resources to be used for transmission of SRS.

[0129] At 530, UE 515 may multiplex SRS with data signals across the assigned resources (e.g., time-frequency resources) according to the received configuration. In some examples, UE 515 may rate match the data signals around the SRS and multiplex the SRS with the rate-matched data signals (e.g., across the assigned time-frequency resources). Additionally or alternatively, UE 515 may use a first covering code (e.g., a first Walsh covering code) to encode the SRS and a second covering code (e.g., a second Walsh covering code) orthogonal to the first covering code to encode the data signals.

[0130] At 535, UE 515 may send the multiplexed SRS to network entity 505. For example, UE 515 may send the multiplexed SRS such that network entity 505 may estimate the channel for wireless communication between UE 515 and network entity 505, sense the environment associated with UE 515 (or network entity 505), or identify the location of UE 515. In some examples, sending the multiplexed SRS to network entity 505 may result in improved channel estimation, sensing (e.g., radar sensing such as MIMO radar sensing), and positioning at network entity 505, as well as other possible benefits.

[0131] Figure 6 Illustrates an example of process flow 600 that supports techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure. In some examples, process flow 600 may implement one or more aspects of wireless communication system 100, wireless communication system 200, wireless communication system 300, timing diagram 400, and process flow 500. For example, process flow 600 may include example operations associated with network entity 605 and UE 615, which may be example devices as referenced Figures 1 to 3 , Figure 4A , Figure 4B and Figure 5 described. Operations performed by network entity 605 and UE 615 may support improvements in communication between UE 615 and network entity 605 and other benefits. In the following description of process flow 600, the operations between UE 615 and network entity 605 may occur in an order different from the illustrated example order. Additionally or alternatively, operations performed by UE 615 and network entity 605 may occur in a different order or at different times. Some operations may also be omitted.

[0132] At 620, the UE 615 may receive a DDM configuration from the network entity 605. The DDM configuration may be an example of a multiplexing configuration as described throughout this disclosure (including references Figure 2 , Figure 4A , and Figure 4B ). For example, the DDM configuration may correspond to a configuration for multiplexing multiple reference signals in the Doppler domain. In some examples, the DDM configuration may indicate multiple phase codes for multiplexing multiple reference signals in the Doppler domain.

[0133] At 625, the UE 615 may receive a resource assignment from the network entity 605. The resource assignment may be an example of a resource assignment as described throughout this disclosure (including reference Figure 2 ). For example, the resource assignment may correspond to an assignment of multiple time - frequency resources for the transmission of multiple reference signals.

[0134] At 630, the UE 615 multiplexes reference signals across the assigned resources (e.g., time - frequency resources) according to the received configuration. For example, the UE 615 may multiplex each reference signal with the corresponding phase code in the phase codes indicated using the DDM configuration.

[0135] At 635, the UE 615 may send the multiplexed reference signals to the network entity 605. In some examples, the network entity 605 may use the reference signals sent from the UE 615 for channel sounding (e.g., estimating one or more characteristics associated with a communication channel used for communication between the UE 615 and the network entity 605), identifying the location of the UE 615, or for radar sensing (e.g., MIMO radar sensing). In some examples, multiplexing reference signals according to the DDM configuration may result in increased uplink coverage, among other possible benefits.

[0136] Figure 7 FIG. 700 is a block diagram of a device 705 that supports techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure. The device 705 may be an example of aspects of the UE 115 as described herein. The device 705 may include a receiver 710, a transmitter 715, and a communication manager 720. The device 705 may also include a processor. Each of these components may communicate with one another (e.g., via one or more buses).

[0137] The receiver 710 may provide components for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to techniques for enhanced SRS multiplexing). The information may be passed to other components of the device 705. The receiver 710 may utilize a single antenna or an array of multiple antennas.

[0138] The transmitter 715 can provide components for transmitting signals generated by other components of the device 705. For example, the transmitter 715 can transmit information associated with various information channels (e.g., control channels, data channels, information channels related to techniques for enhanced SRS multiplexing), such as packets, user data, control information, or any combination thereof. In some examples, the transmitter 715 can be co-located with the receiver 710 in a transceiver component. The transmitter 715 can utilize a single antenna or an array of multiple antennas.

[0139] The communication manager 720, the receiver 710, the transmitter 715, or various combinations or components thereof can be examples of components for performing aspects of the techniques for enhanced SRS multiplexing as described herein. For example, the communication manager 720, the receiver 710, the transmitter 715, or various combinations or components thereof can support methods for performing one or more of the functions described herein.

[0140] In some examples, the communication manager 720, the receiver 710, the transmitter 715, or various combinations or components thereof can be implemented in hardware (e.g., in a communication management circuit). The hardware can include a processor, a digital signal processor (DSP), a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, a microcontroller, discrete gate or transistor logic components, discrete hardware components, or any combination thereof that are configured to or otherwise support components for performing the functions described in this disclosure. In some examples, the processor and the memory coupled to the processor can be configured to perform one or more of the functions described herein (e.g., by the processor executing instructions stored in the memory).

[0141] Additionally or alternatively, in some examples, the communication manager 720, the receiver 710, the transmitter 715, or various combinations or components thereof can be implemented in code executed by a processor (e.g., implemented as communication management software or firmware). If implemented in code executed by a processor, the functions of the communication manager 720, the receiver 710, the transmitter 715, or various combinations or components thereof can be performed by a general purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices that are configured to or otherwise support components for performing the functions described in this disclosure.

[0142] In some examples, the communication manager 720 may be configured to use or otherwise cooperate with the receiver 710, the transmitter 715, or both to perform various operations (e.g., receive, obtain, monitor, output, transmit). For example, the communication manager 720 may receive information from the receiver 710, convey information to the transmitter 715, or integrate with the receiver 710, the transmitter 715, or both to obtain information, output information, or perform various other operations as described herein.

[0143] According to examples disclosed herein, the communication manager 720 may support wireless communication at a UE (e.g., device 705). For example, the communication manager 720 may be configured to or otherwise support components for receiving, from a network entity, a configuration for multiplexing an SRS with a data signal in time and frequency. The communication manager 720 may be configured to or otherwise support components for receiving, from a network entity, an assignment of a set of multiple time-frequency resources for transmission of an SRS. The communication manager 720 may be configured to or otherwise support components for multiplexing an SRS with a data signal across an assigned set of multiple time-frequency resources according to the received configuration. The communication manager 720 may be configured to or otherwise support components for transmitting the multiplexed SRS to a network entity.

[0144] Additionally or alternatively, the communication manager 720 may support wireless communication at a UE (e.g., device 705) according to examples disclosed herein. For example, the communication manager 720 may be configured to or otherwise support components for receiving, from a network entity, a configuration for multiplexing a set of multiple reference signals in the Doppler domain. The communication manager 720 may be configured to or otherwise support components for receiving, from a network entity, an assignment of a set of multiple time-frequency resources for transmission of a set of multiple reference signals. The communication manager 720 may be configured to or otherwise support components for multiplexing a set of multiple reference signals across an assigned set of multiple time-frequency resources according to the received configuration. The communication manager 720 may be configured to or otherwise support components for transmitting the multiplexed set of multiple reference signals to a network entity.

[0145] By including or configuring the communication manager 720 according to examples described herein, the device 705 (e.g., a processor that controls or otherwise is coupled with the receiver 710, the transmitter 715, the communication manager 720, or combinations thereof) may support techniques for more efficiently utilizing communication resources.

[0146] Figure 8FIG. 800 is a block diagram of a device 805 supporting techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure. The device 805 may be an example of aspects of the device 705 or UE 115 as described herein. The device 805 may include a receiver 810, a transmitter 815, and a communication manager 820. The device 805 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0147] The receiver 810 may provide components for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to techniques for enhanced SRS multiplexing). The information may be passed to other components of the device 805. The receiver 810 may utilize a single antenna or a set of multiple antennas.

[0148] The transmitter 815 may provide components for transmitting signals generated by other components of the device 805. For example, the transmitter 815 may transmit information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to techniques for enhanced SRS multiplexing). In some examples, the transmitter 815 may be co-located with the receiver 810 in a transceiver component. The transmitter 815 may utilize a single antenna or a set of multiple antennas.

[0149] The device 805 or its various components may be examples of components for performing various aspects of the techniques for enhanced SRS multiplexing as described herein. For example, the communication manager 820 may include a configuration component 825, a resource assignment component 830, a multiplexing component 835, an SRS component 840, a reference signal component 845, or any combination thereof. The communication manager 820 may be an example of aspects of the communication manager 720 as described herein. In some examples, the communication manager 820 or its various components may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise in cooperation with the receiver 810, the transmitter 815, or both. For example, the communication manager 820 may receive information from the receiver 810, convey information to the transmitter 815, or integrate with the receiver 810, the transmitter 815, or both to obtain information, output information, or perform various other operations as described herein.

[0150] According to examples as disclosed herein, communication manager 820 may support wireless communication at a UE (e.g., device 805). Configuration component 825 may be configured to or otherwise support components for receiving, from a network entity, a configuration for multiplexing SRS with data signals in time and frequency. Resource assignment component 830 may be configured to or otherwise support components for receiving, from a network entity, an assignment of a set of multiple time-frequency resources for transmission of SRS. Multiplexing component 835 may be configured to or otherwise support components for multiplexing SRS with data signals across the assigned set of multiple time-frequency resources according to the received configuration. SRS component 840 may be configured to or otherwise support components for transmitting the multiplexed SRS to a network entity.

[0151] Additionally or alternatively, communication manager 820 may support wireless communication at a UE (e.g., device 805) according to examples as disclosed herein. Configuration component 825 may be configured to or otherwise support components for receiving, from a network entity, a configuration for multiplexing a set of multiple reference signals in the Doppler domain. Resource assignment component 830 may be configured to or otherwise support components for receiving, from a network entity, an assignment of a set of multiple time-frequency resources for transmission of the set of multiple reference signals. Multiplexing component 835 may be configured to or otherwise support components for multiplexing the set of multiple reference signals across the assigned set of multiple time-frequency resources according to the received configuration. Reference signal component 845 may be configured to or otherwise support components for transmitting the multiplexed set of multiple reference signals to a network entity.

[0152] Figure 9 Block diagram 900 of a communication manager 920 is shown that supports techniques for enhanced SRS multiplexing, in accordance with various aspects of the present disclosure. Communication manager 920 may be an example of aspects of communication manager 720, communication manager 820, or both, as described herein. Communication manager 920 or its various components may be examples of components for performing various aspects of the techniques for enhanced SRS multiplexing as described herein. For example, communication manager 920 may include configuration component 925, resource assignment component 930, multiplexing component 935, SRS component 940, reference signal component 945, rate matching component 950, comb pattern component 955, cover code component 960, resource block component 965, phase code component 970, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses).

[0153] According to an example disclosed herein, the communication manager 920 may support wireless communication at a UE. The configuration component 925 may be configured to or otherwise support components for receiving, from a network entity, a configuration for multiplexing SRS with a data signal in time and frequency. The resource assignment component 930 may be configured to or otherwise support components for receiving, from a network entity, an assignment of a set of multiple time-frequency resources for transmission of SRS. The multiplexing component 935 may be configured to or otherwise support components for multiplexing SRS with a data signal across the assigned set of multiple time-frequency resources according to the received configuration. The SRS component 940 may be configured to or otherwise support components for transmitting the multiplexed SRS to a network entity.

[0154] In some examples, to support multiplexing SRS with a data signal, the rate matching component 950 may be configured to or otherwise support components for receiving, from a network entity, an indication to rate match a data signal around SRS. In some examples, to support multiplexing SRS with a data signal, the rate matching component 950 may be configured to or otherwise support components for rate matching a data signal around SRS in response to receiving the indication. In some examples, to support multiplexing SRS with a data signal, the multiplexing component 935 may be configured to or otherwise support components for multiplexing SRS with the rate-matched data signal across the assigned set of multiple time-frequency resources.

[0155] In some examples, to support rate matching a data signal around SRS, the comb pattern component 955 may be configured to or otherwise support components for receiving, from a network entity, an indication of a comb pattern that identifies resource blocks within the assigned set of multiple time-frequency resources to be used for transmission of SRS at the UE. In some examples, to support rate matching a data signal around SRS, the rate matching component 950 may be configured to or otherwise support components for rate matching a data signal around SRS across the assigned set of multiple time-frequency resources according to the indicated comb pattern.

[0156] In some examples, to support multiplexing SRS with a data signal, the comb pattern component 955 may be configured to or otherwise support components for receiving, from a network entity, an indication of a comb pattern and a frequency offset associated with the comb pattern that identifies resource blocks within the assigned set of multiple time-frequency resources to be used for transmission of SRS at the UE. In some examples, to support multiplexing SRS with a data signal, the multiplexing component 935 may be configured to or otherwise support components for multiplexing SRS with a data signal across the assigned set of multiple time-frequency resources according to the indicated comb pattern and frequency offset.

[0157] In some examples, to support multiplexing of the SRS with data signals, the coverage code component 960 may be configured to or otherwise support components for encoding the SRS using a first coverage code. In some examples, to support multiplexing of the SRS with data signals, the coverage code component 960 may be configured to or otherwise support components for encoding the data signals using a second coverage code orthogonal to the first coverage code. In some examples, to support multiplexing of the SRS with data signals, the multiplexing component 935 may be configured to or otherwise support components for multiplexing the SRS with data signals across a set of allocated multiple time-frequency resources.

[0158] In some examples, to support multiplexing of the SRS with data signals, the multiplexing component 935 may be configured to or otherwise support components for multiplexing the SRS with data signals and at least one DMRS across a set of allocated multiple time-frequency resources.

[0159] In some examples, to support multiplexing of the SRS with data signals, the resource block component 965 may be configured to or otherwise support components for receiving, from a network entity, an indication of a resource block within a set of allocated multiple time-frequency resources to be used for transmission of the SRS at the UE. In some examples, to support multiplexing of the SRS with data signals, the multiplexing component 935 may be configured to or otherwise support components for multiplexing the SRS with data signals within the indicated resource block across a set of allocated multiple time-frequency resources, wherein the SRS occupies a first portion of the indicated resource block and the data signal occupies a second portion of the indicated resource block.

[0160] In some examples, the SRS component 940 may be configured to or otherwise support components for which the SRS is used to estimate a channel for wireless communication between the UE and the network entity at the network entity. In some examples, the SRS component 940 may be configured to or otherwise support components for which the SRS is used to sense an environment associated with the UE at the network entity. In some examples, the SRS component 940 may be configured to or otherwise support components for which the SRS is used to identify a location of the UE at the network entity. In some examples, the data signal includes a PUCCH signal or a PUSCH.

[0161] Additionally or alternatively, according to examples disclosed herein, communication manager 920 may support wireless communication at a UE. In some examples, configuration component 925 may be configured to or otherwise support components for receiving, from a network entity, a configuration for multiplexing a set of multiple reference signals in the Doppler domain. In some examples, resource assignment component 930 may be configured to or otherwise support components for receiving, from a network entity, an assignment of a set of multiple time-frequency resources for transmission of a set of multiple reference signals. In some examples, multiplexing component 935 may be configured to or otherwise support components for multiplexing a set of multiple reference signals across an assigned set of multiple time-frequency resources according to the received configuration. Reference signal component 945 may be configured to or otherwise support components for transmitting the multiplexed set of multiple reference signals to a network entity.

[0162] In some examples, to support multiplexing a set of multiple reference signals, phase code component 970 may be configured to or otherwise support components for receiving, from a network entity, an indication of a set of multiple phase codes for multiplexing a set of multiple reference signals in the Doppler domain. In some examples, to support multiplexing a set of multiple reference signals, multiplexing component 935 may be configured to or otherwise support components for multiplexing a set of multiple reference signals using the indicated set of multiple phase codes.

[0163] In some examples, to support multiplexing a set of multiple reference signals using the indicated set of multiple phase codes, phase code component 970 may be configured to or otherwise support components for multiplexing each reference signal in the set of multiple reference signals with a corresponding phase code in the indicated set of multiple phase codes. In some examples, each corresponding phase code is based on a corresponding antenna port in a set of multiple antenna ports at the UE and a corresponding symbol within the assigned set of multiple time-frequency resources.

[0164] Reference signal component 945 may be configured to or otherwise support components for which reference signals are used to estimate a channel for wireless communication between the UE and the network entity at the network entity. Reference signal component 945 may be configured to or otherwise support components for which reference signals are used to sense an environment associated with the UE at the network entity. Reference signal component 945 may be configured to or otherwise support components for which reference signals are used to identify a location of the UE at the network entity. In some examples, the set of multiple reference signals includes SRS, positioning reference signals, or sensing reference signals.

[0165] Figure 10FIG. shows a diagram of a system 1000 including a device 1005 that supports techniques for enhanced SRS multiplexing, in accordance with various aspects of the present disclosure. The device 1005 may be an example of the device 705, the device 805, or the UE 115 as described herein, or may include components thereof. The device 1005 may communicate (e.g., wirelessly) with one or more of the network entities 105, one or more of the UEs 115, or any combination thereof. The device 1005 may include components for two-way voice and data communication, including components for sending and receiving communications, such as a communication manager 1020, an input / output (I / O) controller (e.g., I / O controller 1010), a transceiver 1015, an antenna 1025, a memory 1030, code 1035, and a processor 1040. These components may be electronically communicated or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., bus 1045).

[0166] The I / O controller 1010 may manage input signals and output signals of the device 1005. The I / O controller 1010 may also manage peripheral devices not integrated into the device 1005. In some cases, the I / O controller 1010 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 1010 may utilize an operating system, such as or another known operating system. Additionally or alternatively, the I / O controller 1010 may represent or interact with a modem, a keyboard, a mouse, a touch screen, or similar devices. In some cases, the I / O controller 1010 may be implemented as part of a processor (such as the processor 1040). In some cases, a user may interact with the device 1005 via the I / O controller 1010 or via hardware components controlled by the I / O controller 1010.

[0167] In some cases, device 1005 may include a single antenna (e.g., antenna 1025). However, in some other cases, device 1005 may have more than one antenna among antennas 1025, and the more than one antenna may be capable of concurrently transmitting or receiving multiple wireless transmissions. As described herein, transceiver 1015 may perform two-way communication via one or more of antennas 1025, a wired or wireless link. For example, transceiver 1015 may represent a wireless transceiver and may perform two-way communication with another wireless transceiver. Transceiver 1015 may also include a modem that is configured to: modulate a packet; provide the modulated packet to one or more of antennas 1025 for transmission; and demodulate a packet received from one or more of antennas 1025. Transceiver 1015 or transceiver 1015 and one or more of antennas 1025 may be examples of transmitter 715, transmitter 815, receiver 710, receiver 810, or any combination thereof or components thereof as described herein.

[0168] Memory 1030 may include random access memory (RAM) and read-only memory (ROM). Memory 1030 may store computer-readable, computer-executable code (e.g., code 1035) that includes instructions which, when executed by processor 1040, cause device 1005 to perform the various functions described herein. Code 1035 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, code 1035 may not be directly executable by processor 1040 but may (e.g., when compiled and executed) cause a computer to perform the functions described herein. In some cases, among other things, memory 1030 may also contain a basic input / output system (BIOS) that may control basic hardware or software operations, such as interactions with peripheral components or devices.

[0169] The processor 1040 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1040 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the processor 1040. The processor 1040 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1030) to cause the device 1005 to perform various functions (e.g., functions or tasks supporting techniques for enhanced SRS multiplexing). For example, the device 1005 or components of the device 1005 may include the processor 1040 and a memory 1030 coupled to or coupled with the processor 1040, and the processor 1040 and the memory 1030 are configured to perform the various functions described herein.

[0170] According to examples disclosed herein, the communication manager 1020 may support wireless communication at a UE (e.g., device 1005). For example, the communication manager 1020 may be configured to or otherwise support components for receiving, from a network entity, a configuration for multiplexing SRS with a data signal in time and frequency. The communication manager 1020 may be configured to or otherwise support components for receiving, from a network entity, an assignment of a set of multiple time-frequency resources for transmission of SRS. The communication manager 1020 may be configured to or otherwise support components for multiplexing SRS with a data signal across the assigned set of multiple time-frequency resources according to the received configuration. The communication manager 1020 may be configured to or otherwise support components for transmitting the multiplexed SRS to a network entity.

[0171] Additionally or alternatively, the communication manager 1020 may support wireless communication at a UE (e.g., device 1005) according to examples disclosed herein. For example, the communication manager 1020 may be configured to or otherwise support components for receiving, from a network entity, a configuration for multiplexing a set of multiple reference signals in the Doppler domain. The communication manager 1020 may be configured to or otherwise support components for receiving, from a network entity, an assignment of a set of multiple time-frequency resources for transmission of the set of multiple reference signals. The communication manager 1020 may be configured to or otherwise support components for multiplexing the set of multiple reference signals across the assigned set of multiple time-frequency resources according to the received configuration. The communication manager 1020 may be configured to or otherwise support components for transmitting the multiplexed set of multiple reference signals to a network entity.

[0172] By including or configuring a communication manager 1020 according to an example as described herein, the device 1005 may support techniques for improving communication reliability, more efficiently utilizing communication resources, and improving coordination among devices.

[0173] In some examples, the communication manager 1020 may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise in cooperation with one or more of the transceiver 1015, antennas 1025, or any combination thereof. Although the communication manager 1020 is illustrated as a separate component, in some examples, one or more of the functions described with reference to the communication manager 1020 may be supported or performed by the processor 1040, the memory 1030, the code 1035, or any combination thereof. For example, the code 1035 may include instructions executable by the processor 1040 to cause the device 1005 to perform aspects of the techniques for enhancing SRS multiplexing as described herein, or the processor 1040 and the memory 1030 may otherwise be configured to perform or support such operations.

[0174] Figure 11 Block diagram 1100 illustrates a device 1105 that supports techniques for enhancing SRS multiplexing in accordance with various aspects of the present disclosure. The device 1105 may be an example of aspects of the network entity 105 as described herein. The device 1105 may include a receiver 1110, a transmitter 1115, and a communication manager 1120. The device 1105 may also include a processor. Each of these components may communicate with one another (e.g., via one or more buses).

[0175] The receiver 1110 may provide components for obtaining (e.g., receiving, determining, identifying) information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). The information may be passed to other components of the device 1105. In some examples, the receiver 1110 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, the receiver 1110 may support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.

[0176] The transmitter 1115 can provide components for outputting (e.g., transmitting, providing, conveying, delivering) information generated by other components of the device 1105. For example, the transmitter 1115 can output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). In some examples, the transmitter 1115 can support outputting information by transmitting signals via one or more antennas. Additionally or alternatively, the transmitter 1115 can support outputting information by transmitting signals via one or more wired (e.g., electrical, optical fiber) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1115 and the receiver 1110 can be co-located in a transceiver, which can include a modem or be coupled to a modem.

[0177] The communication manager 1120, the receiver 1110, the transmitter 1115, or various combinations or various components thereof can be examples of components for performing aspects of the techniques for enhancing SRS multiplexing as described herein. For example, the communication manager 1120, the receiver 1110, the transmitter 1115, or various combinations or components thereof can support methods for performing one or more of the functions described herein.

[0178] In some examples, the communication manager 1120, the receiver 1110, the transmitter 1115, or various combinations or components thereof can be implemented in hardware (e.g., in a communication management circuit). The hardware can include a processor, a DSP, a CPU, an ASIC, an FPGA, or other programmable logic device, a microcontroller, discrete gate or transistor logic components, discrete hardware components, or any combination thereof that are configured to or otherwise support components for performing the functions described in this disclosure. In some examples, the processor and the memory coupled to the processor can be configured to perform one or more of the functions described herein (e.g., by the processor executing instructions stored in the memory).

[0179] Additionally or alternatively, in some examples, the communication manager 1120, the receiver 1110, the transmitter 1115, or various combinations or components thereof can be implemented in code executed by a processor (e.g., implemented as communication management software or firmware). If implemented in code executed by a processor, the functions of the communication manager 1120, the receiver 1110, the transmitter 1115, or various combinations or components thereof can be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices that are configured to or otherwise support components for performing the functions described in this disclosure.

[0180] In some examples, the communication manager 1120 may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise in cooperation with the receiver 1110, the transmitter 1115, or both. For example, the communication manager 1120 may receive information from the receiver 1110, convey information to the transmitter 1115, or integrate in combination with the receiver 1110, the transmitter 1115, or both to obtain information, output information, or perform various other operations as described herein.

[0181] According to examples disclosed herein, the communication manager 1120 may support wireless communication at a network entity (e.g., device 1105). For example, the communication manager 1120 may be configured to or otherwise support components for outputting to a UE a configuration for multiplexing an SRS with a data signal in time and frequency. The communication manager 1120 may be configured to or otherwise support components for outputting to a UE an assignment of a set of multiple time-frequency resources for transmission of an SRS. The communication manager 1120 may be configured to or otherwise support components for obtaining an SRS and a data signal from a UE, wherein the obtained SRS and the obtained data signal are multiplexed across the set of assigned multiple time-frequency resources according to the output configuration.

[0182] Additionally or alternatively, the communication manager 1120 may support wireless communication at a network entity (e.g., device 1105) according to examples disclosed herein. For example, the communication manager 1120 may be configured to or otherwise support components for outputting to a UE a configuration for multiplexing a set of multiple reference signals in the Doppler domain. The communication manager 1120 may be configured to or otherwise support components for outputting to a UE an assignment of a set of multiple time-frequency resources for transmission of a set of multiple reference signals. The communication manager 1120 may be configured to or otherwise support components for obtaining a set of multiple reference signals from a UE, wherein the obtained set of multiple reference signals is multiplexed across the set of assigned multiple time-frequency resources according to the output configuration.

[0183] By including or configuring the communication manager 1120 according to examples described herein, the device 1105 (e.g., a processor that controls or otherwise is coupled with the receiver 1110, the transmitter 1115, the communication manager 1120, or combinations thereof) may support techniques for more efficiently utilizing communication resources.

[0184] Figure 12FIG. 1200 is a block diagram of an apparatus 1205 that supports techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure. The apparatus 1205 may be an example of aspects of the apparatus 1105 or the network entity 105 as described herein. The apparatus 1205 may include a receiver 1210, a transmitter 1215, and a communication manager 1220. The apparatus 1205 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0185] The receiver 1210 may provide components for obtaining (e.g., receiving, determining, identifying) information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). The information may be passed to other components of the apparatus 1205. In some examples, the receiver 1210 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, the receiver 1210 may support obtaining information by receiving signals via one or more wired (e.g., electrical, optical fiber) interfaces, wireless interfaces, or any combination thereof.

[0186] The transmitter 1215 may provide components for outputting (e.g., transmitting, providing, conveying, delivering) information generated by other components of the apparatus 1205. For example, the transmitter 1215 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). In some examples, the transmitter 1215 may support outputting information by transmitting signals via one or more antennas. Additionally or alternatively, the transmitter 1215 may support outputting information by transmitting signals via one or more wired (e.g., electrical, optical fiber) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1215 and the receiver 1210 may be co-located in a transceiver that may include a modem or be coupled to a modem.

[0187] Device 1205 or its various components may be examples of components for performing aspects of the techniques for enhancing SRS multiplexing as described herein. For example, communication manager 1220 may include a multiplexing configuration component 1225, a time-frequency resource component 1230, a signal component 1235, or any combination thereof. Communication manager 1220 may be an example of aspects of communication manager 1120 as described herein. In some examples, communication manager 1220 or its various components may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise in cooperation with receiver 1210, transmitter 1215, or both. For example, communication manager 1220 may receive information from receiver 1210, convey information to transmitter 1215, or integrate in combination with receiver 1210, transmitter 1215, or both to obtain information, output information, or perform various other operations as described herein.

[0188] According to examples as disclosed herein, communication manager 1220 may support wireless communication at a network entity (e.g., device 1205). Multiplexing configuration component 1225 may be configured to or otherwise support a component for outputting to a UE a configuration for multiplexing an SRS with a data signal in time and frequency. Time-frequency resource component 1230 may be configured to or otherwise support a component for outputting to a UE an assignment of a set of multiple time-frequency resources for transmission of an SRS. Signal component 1235 may be configured to or otherwise support a component for obtaining an SRS and a data signal from a UE, wherein the obtained SRS is multiplexed with the obtained data signal across the set of assigned multiple time-frequency resources according to the output configuration.

[0189] Additionally or alternatively, communication manager 1220 may support wireless communication at a network entity (e.g., device 1205) according to examples as disclosed herein. Multiplexing configuration component 1225 may be configured to or otherwise support a component for outputting to a UE a configuration for multiplexing a set of multiple reference signals in the Doppler domain. Time-frequency resource component 1230 may be configured to or otherwise support a component for outputting to a UE an assignment of a set of multiple time-frequency resources for transmission of a set of multiple reference signals. Signal component 1235 may be configured to or otherwise support a component for obtaining a set of multiple reference signals from a UE, wherein the obtained set of multiple reference signals is multiplexed across the set of assigned multiple time-frequency resources according to the output configuration.

[0190] Figure 13FIG. 1300 is a block diagram showing a communication manager 1320 that supports techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure. The communication manager 1320 may be an example of aspects of the communication manager 1120, the communication manager 1220, or both as described herein. The communication manager 1320 or its various components may be examples of components for performing various aspects of the techniques for enhanced SRS multiplexing as described herein. For example, the communication manager 1320 may include a multiplexing configuration component 1325, a time-frequency resource component 1330, a signal component 1335, a comb pattern indication component 1340, a resource block indication component 1345, a channel estimation component 1350, a positioning component 1355, a sensing component 1360, a phase code indication component 1365, a rate matching indication component 1370, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses), and such communication may include communication within a protocol layer of a protocol stack, communication associated with a logical channel of the protocol stack (e.g., between protocol layers of the protocol stack, within a device, component, or virtualized component associated with the network entity 105, between devices, components, or virtualized components associated with the network entity 105), or any combination thereof.

[0191] In accordance with an example as disclosed herein, the communication manager 1320 may support wireless communication at a network entity. The multiplexing configuration component 1325 may be configured to or otherwise support a component for outputting a configuration to a UE for multiplexing SRS with a data signal in time and frequency. The time-frequency resource component 1330 may be configured to or otherwise support a component for outputting an assignment of a set of multiple time-frequency resources for transmission of SRS to a UE. The signal component 1335 may be configured to or otherwise support a component for obtaining an SRS and a data signal from a UE, where the obtained SRS is multiplexed with the obtained data signal across the set of assigned multiple time-frequency resources according to the output configuration.

[0192] In some examples, to support the output configuration, the comb pattern indication component 1340 may be configured to or otherwise support a component for outputting an indication of a comb pattern to a UE, the comb pattern identifying resource blocks within the set of assigned multiple time-frequency resources to be used at the UE for transmission of SRS, where rate matching of the obtained data signal around the SRS is performed according to the indicated comb pattern.

[0193] In some examples, the rate matching indication component 1370 may be configured to or otherwise support a component for outputting an indication to a UE to perform rate matching of a data signal around an SRS according to the indicated comb pattern, where obtaining the data signal is based on the output indication.

[0194] In some examples, to support output configuration, the comb pattern indication component 1340 may be configured to or otherwise support components for outputting to the UE an indication of a comb pattern and a frequency offset that identify resource blocks within a set of multiple assigned time-frequency resources to be used for SRS transmission at the UE, wherein the obtained SRS is multiplexed according to the indicated comb pattern and frequency offset. In some examples, the obtained SRS is encoded using a first covering code, and the obtained data signal is encoded using a second covering code orthogonal to the first covering code.

[0195] In some examples, the signal component 1335 may be configured to or otherwise support components for obtaining DMRS from the UE, wherein the obtained DMRS is multiplexed with the obtained SRS and the obtained data signal across a set of multiple assigned time-frequency resources.

[0196] In some examples, to support output configuration, the resource block indication component 1345 may be configured to or otherwise support components for outputting to the UE an indication of resource blocks within a set of multiple assigned time-frequency resources to be used for SRS transmission at the UE, wherein the obtained SRS occupies a first portion of the indicated resource blocks, and the obtained data signal occupies a second portion of the indicated resource blocks.

[0197] In some examples, the channel estimation component 1350 may be configured to or otherwise support components for estimating a channel for wireless communication between the UE and a network entity based on the obtained SRS. In some examples, the positioning component 1355 may be configured to or otherwise support components for identifying the location of the UE based on the SRS. In some examples, the sensing component 1360 may be configured to or otherwise support components for sensing an environment associated with the UE based on the obtained SRS.

[0198] In some examples, to support sensing an environment associated with the UE, the sensing component 1360 may be configured to or otherwise support components for sensing an environment associated with the UE using MIMO radar. In some examples, the data signal includes a PUCCH signal or a PUSCH.

[0199] Additionally or alternatively, according to examples as disclosed herein, communication manager 1320 may support wireless communication at a network entity. In some examples, multiplexing configuration component 1325 may be configured to or otherwise support components for outputting a configuration to a UE for multiplexing a set of multiple reference signals in a Doppler domain. In some examples, time-frequency resource component 1330 may be configured to or otherwise support components for outputting an assignment of a set of multiple time-frequency resources to a UE for transmission of a set of multiple reference signals. In some examples, signal component 1335 may be configured to or otherwise support components for obtaining a set of multiple reference signals from a UE, wherein the obtained set of multiple reference signals is multiplexed across the assigned set of multiple time-frequency resources according to the output configuration.

[0200] In some examples, phase code indication component 1365 may be configured to or otherwise support components for outputting an indication of a set of multiple phase codes for multiplexing a set of multiple reference signals to a UE, wherein each obtained reference signal in the obtained set of multiple reference signals is multiplexed using a corresponding phase code in the indicated set of multiple phase codes.

[0201] In some examples, each phase code in the set of multiple phase codes corresponds to a respective antenna port in a set of multiple antenna ports at the UE and a respective symbol within the assigned set of multiple time-frequency resources.

[0202] In some examples, channel estimation component 1350 may be configured to or otherwise support components for estimating a channel for wireless communication between a UE and a network entity based on the obtained set of multiple reference signals. In some examples, positioning component 1355 may be configured to or otherwise support components for identifying a location of the UE based on the obtained set of multiple reference signals. In some examples, sensing component 1360 may be configured to or otherwise support components for sensing an environment associated with the UE based on the obtained set of multiple reference signals. In some examples, the set of multiple reference signals includes SRS, positioning reference signals, or sensing reference signals.

[0203] Figure 14FIG. shows a diagram of a system 1400 including a device 1405 that supports techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure. The device 1405 may be an example of the device 1105, the device 1205, or the network entity 105 as described herein, or include components thereof. The device 1405 may communicate with one or more of the network entities in the network entity 105, one or more of the UEs in the UE 115, or any combination thereof, which may include communication via one or more wired interfaces, via one or more wireless interfaces, or any combination thereof. The device 1405 may include components that support outputting and obtaining communications, such as a communication manager 1420, a transceiver 1410, an antenna 1415, a memory 1425, code 1430, and a processor 1435. These components may communicate electronically or otherwise be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., bus 1440).

[0204] The transceiver 1410 may support bidirectional communication via a wired link, a wireless link, or both as described herein. In some examples, the transceiver 1410 may include a wired transceiver and may communicate bidirectionally with another wired transceiver. Additionally or alternatively, in some examples, the transceiver 1410 may include a wireless transceiver and may communicate bidirectionally with another wireless transceiver. In some examples, the device 1405 may include one or more of the antennas 1415, which may be capable of sending or receiving wireless transmissions (e.g., concurrently). The transceiver 1410 may also include a modem for: modulating a signal; providing the modulated signal for transmission (e.g., via one or more of the antennas 1415, via a wired transmitter); receiving the modulated signal (e.g., from one or more of the antennas 1415, from a wired receiver); and demodulating the signal. In some implementations, the transceiver 1410 may include one or more interfaces, such as one or more interfaces coupled to one or more of the antennas 1415 configured to support various receiving or obtaining operations or one or more interfaces coupled to one or more of the antennas 1415 configured to support various transmitting or outputting operations, or a combination thereof. In some implementations, the transceiver 1410 may include or be configured to be coupled to one or more processors or memory components, which are operable to perform or support operations based on received or obtained information or signals, or to generate information or other signals for transmission or other output, or any combination thereof. In some implementations, the transceiver 1410, or the transceiver 1410 and one or more of the antennas 1415, or the transceiver 1410 and one or more of the antennas 1415 and one or more processors or memory components (e.g., the processor 1435 or the memory 1425 or both) may be included in a chip or chip assembly installed in the device 1405. In some examples, the transceiver may be operable to support communications via one or more communication links (eg, communication link 125, backhaul communication link 120, midhaul communication link 162, fronthaul communication link 168).

[0205] Memory 1425 may include RAM and ROM. Memory 1425 may store computer-readable, computer-executable code (e.g., code 1430) including instructions that, when executed by processor 1435, cause device 1405 to perform the various functions described herein. Code 1430 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, code 1430 may not be directly executable by processor 1435 but may (e.g., when compiled and executed) cause a computer to perform the functions described herein. In some cases, among other things, memory 1425 may also contain BIOS, which may control basic hardware or software operations, such as interactions with peripheral components or devices.

[0206] Processor 1435 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, ASICs, CPUs, FPGAs, microcontrollers, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 1435 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into processor 1435. Processor 1435 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1425) to cause device 1405 to perform various functions (e.g., functions or tasks supporting techniques for enhanced SRS multiplexing). For example, device 1405 or components of device 1405 may include processor 1435 and memory 1425 coupled to processor 1435, and the processor 1435 and memory 1425 are configured to perform the various functions described herein. Processor 1435 may be an example of a cloud computing platform (e.g., one or more physical nodes and supporting software such as an operating system, virtual machine, or container instance) that may host functions for performing the functions of device 1405 (e.g., by executing code 1430). Processor 1435 may be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in device 1405 (such as within memory 1425). In some specific implementations, processor 1435 may be a component of a processing system. A processing system may refer to a system or series of machines or components that receive inputs and process those inputs to produce a set of outputs that may be passed to other systems or components (e.g., device 1405). For example, the processing system of device 1405 may refer to a system including various other components or sub-components of device 1405 (such as processor 1435, or transceiver 1410, or communication manager 1420, or a combination of other components or components of device 1405). The processing system of device 1405 may interface with other components of device 1405 and may process information (such as inputs or signals) received from other components or output information to other components. For example, a chip or modem of device 1405 may include a processing system and one or more interfaces for outputting information or for obtaining information or both. One or more interfaces may be implemented as or otherwise include a first interface configured to output information and a second interface configured to obtain information or the same interface configured to output information and obtain information, as well as other specific implementations. In some specific implementations, one or more interfaces may refer to an interface between the processing system of a chip or modem and a transmitter such that device 1405 may transmit information output from the chip or modem. Additionally or alternatively, in some specific implementations, one or more interfaces may refer to an interface between the processing system of a chip or modem and a receiver such that device 1405 may obtain information or signal inputs, and the information may be passed to the processing system.One of ordinary skill in the art will readily recognize that the first interface may also obtain information or signal input, and the second interface may also output information or signal output.

[0207] In some examples, bus 1440 may support communication within a protocol layer of a protocol stack (e.g., within the protocol layer). In some examples, bus 1440 may support communication associated with a logical channel of a protocol stack (e.g., between protocol layers of the protocol stack), which may include communication performed within components of device 1405, or communication performed between different components of device 1405 that may be co-located or may be located at different locations (e.g., where device 1405 may refer to a system in which one or more of communication manager 1420, transceiver 1410, memory 1425, code 1430, and processor 1435 may be located in one component or divided among different components).

[0208] In some examples, communication manager 1420 may manage aspects of communication with core network 130 (e.g., via one or more wired or wireless backhaul links). For example, communication manager 1420 may manage the transmission of data communication for one or more UEs in a client device such as UE 115. In some examples, communication manager 1420 may manage communication with other network entities in network entity 105, and may include a controller or scheduler for coordinating with other network entities in network entity 105 to control communication with UE 115. In some examples, communication manager 1420 may support the X2 interface within LTE / LTE-A wireless communication network technology to provide communication between network entities 105.

[0209] According to examples disclosed herein, communication manager 1420 may support wireless communication at a network entity (e.g., device 1405). For example, communication manager 1420 may be configured to or otherwise support components for outputting to a UE a configuration for multiplexing SRS with a data signal in time and frequency. Communication manager 1420 may be configured to or otherwise support components for outputting to a UE an assignment of a set of multiple time-frequency resources for transmission of SRS. Communication manager 1420 may be configured to or otherwise support components for obtaining SRS and data signals from a UE, where the obtained SRS is multiplexed with the obtained data signals across the set of assigned multiple time-frequency resources according to the output configuration.

[0210] Additionally or alternatively, the communication manager 1420 may support wireless communication at a network entity (e.g., device 1405) according to examples disclosed herein. For example, the communication manager 1420 may be configured to or otherwise support components for outputting to a UE a configuration for multiplexing a set of multiple reference signals in the Doppler domain. The communication manager 1420 may be configured to or otherwise support components for outputting to a UE an assignment of a set of multiple time-frequency resources for transmission of a set of multiple reference signals. The communication manager 1420 may be configured to or otherwise support components for obtaining from a UE a set of multiple reference signals, wherein the obtained set of multiple reference signals is multiplexed across the assigned set of multiple time-frequency resources according to the output configuration.

[0211] By including or configuring the communication manager 1420 according to examples described herein, the device 1405 may support techniques for improving communication reliability, more efficiently utilizing communication resources, and improving coordination among devices.

[0212] In some examples, the communication manager 1420 may be configured to use or otherwise cooperate with one or more antennas (e.g., where applicable) of the transceiver 1410, the antenna 1415, or any combination thereof to perform various operations (e.g., receive, obtain, monitor, output, transmit). Although the communication manager 1420 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 1420 may be supported or performed by the transceiver 1410, the processor 1435, the memory 1425, the code 1430, or any combination thereof. For example, the code 1430 may include instructions executable by the processor 1435 to cause the device 1405 to perform aspects of the techniques for enhancing SRS multiplexing described herein, or the processor 1435 and the memory 1425 may otherwise be configured to perform or support such operations.

[0213] Figure 15 A flowchart illustrating a method 1500 for supporting techniques for enhancing SRS multiplexing in accordance with various aspects of the present disclosure is shown. The operations of method 1500 may be implemented by a UE or components thereof as described herein. For example, the operations of method 1500 may be performed by a UE 115 as described with reference to Figures 1 to 10 above. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functions.

[0214] At 1505, the method may include receiving, from a network entity, a configuration for multiplexing SRS with data signals in time and frequency. The operations at 1505 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations at 1505 may be performed by a configuration component 925 as described with reference to Figure 9 the configuration component 925 described above.

[0215] At 1510, the method may include receiving, from a network entity, an assignment of a set of multiple time-frequency resources for transmission of SRS. The operations at 1510 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations at 1510 may be performed by a resource assignment component 930 as described with reference to Figure 9 the resource assignment component 930 described above.

[0216] At 1515, the method may include multiplexing SRS with data signals across the assigned set of multiple time-frequency resources according to the received configuration. The operations at 1515 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations at 1515 may be performed by a multiplexing component 935 as described with reference to Figure 9 the multiplexing component 935 described above.

[0217] At 1520, the method may include transmitting the multiplexed SRS to a network entity. The operations at 1520 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations at 1520 may be performed by an SRS component 940 as described with reference to Figure 9 the SRS component 940 described above.

[0218] Figure 16 FIG. 1600 is a flow diagram illustrating a method 1600 that supports techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure. The operations of method 1600 may be implemented by a UE or components thereof as described herein. For example, the operations of method 1600 may be performed by a UE 115 as described with reference to Figures 1 to 10 the UE 115 described above. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use special-purpose hardware to perform aspects of the described functions.

[0219] At 1605, the method may include receiving, from a network entity, a configuration for multiplexing a set of multiple reference signals in the Doppler domain. The operations at 1605 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations at 1605 may be performed by a configuration component 925 as described with reference to Figure 9 the configuration component 925 described above.

[0220] At 1610, the method may include receiving, from a network entity, an assignment of a set of multiple time-frequency resources for transmission of a set of multiple reference signals. The operations of 1610 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations of 1610 may be performed by a resource assignment component 930 as described with reference to Figure 9 the resource assignment component 930 described above.

[0221] At 1615, the method may include multiplexing a set of multiple reference signals across the assigned set of multiple time-frequency resources according to the received configuration. The operations of 1615 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations of 1615 may be performed by a multiplexing component 935 as described with reference to Figure 9 the multiplexing component 935 described above.

[0222] At 1620, the method may include transmitting the multiplexed set of multiple reference signals to the network entity. The operations of 1620 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations of 1620 may be performed by a reference signal component 945 as described with reference to Figure 9 the reference signal component 945 described above.

[0223] Figure 17 FIG. 1700 is a flow diagram illustrating a method 1700 that supports techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure. The operations of method 1700 may be implemented by a network entity or components thereof as described herein. For example, the operations of method 1700 may be performed by a network entity as described with reference to Figures 1 to 6 as well as Figures 11 to 14 the network entity described above. In some examples, the network entity may execute an instruction set to control functional elements of the network entity to perform the described functions. Additionally or alternatively, the network entity may use special purpose hardware to perform aspects of the described functions.

[0224] At 1705, the method may include outputting, to a UE, a configuration for multiplexing SRS with data signals in time and frequency. The operations of 1705 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations of 1705 may be performed by a multiplexing configuration component 1325 as described with reference to Figure 13 the multiplexing configuration component 1325 described above.

[0225] At 1710, the method may include outputting, to the UE, an assignment of a set of multiple time-frequency resources for transmission of SRS. The operations of 1710 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations of 1710 may be performed by a time-frequency resource component 1330 as described with reference to Figure 13 the time-frequency resource component 1330 described above.

[0226] At 1715, the method may include obtaining a sounding reference signal (SRS) and a data signal from a user equipment (UE), where the obtained SRS and the obtained data signal are multiplexed across a set of assigned multiple time-frequency resources according to an output configuration. The operations at 1715 may be performed according to the examples disclosed herein. In some examples, aspects of the operations at 1715 may be performed by a signal component 1335 as described with reference to Figure 13 the signal component 1335 described above.

[0227] Figure 18 FIG. 1800 is a flow diagram illustrating a method 1800 that supports techniques for enhanced SRS multiplexing in accordance with various aspects of the present disclosure. The operations of method 1800 may be implemented by a network entity or its components as described herein. For example, the operations of method 1800 may be performed by a network entity as described with reference to Figures 1 to 6 and Figures 11 to 14 the network entity described above. In some examples, the network entity may execute an instruction set to control functional elements of the network entity to perform the described functions. Additionally or alternatively, the network entity may use dedicated hardware to perform aspects of the described functions.

[0228] At 1805, the method may include outputting to the UE a configuration for multiplexing a set of multiple reference signals in the Doppler domain. The operations at 1805 may be performed according to the examples disclosed herein. In some examples, aspects of the operations at 1805 may be performed by a multiplexing configuration component 1325 as described with reference to Figure 13 the multiplexing configuration component 1325 described above.

[0229] At 1810, the method may include outputting to the UE an assignment of a set of multiple time-frequency resources for transmission of a set of multiple reference signals. The operations at 1810 may be performed according to the examples disclosed herein. In some examples, aspects of the operations at 1810 may be performed by a time-frequency resource component 1330 as described with reference to Figure 13 the time-frequency resource component 1330 described above.

[0230] At 1815, the method may include obtaining from the UE a set of multiple reference signals, where the obtained set of multiple reference signals is multiplexed across a set of assigned multiple time-frequency resources according to an output configuration. The operations at 1815 may be performed according to the examples disclosed herein. In some examples, aspects of the operations at 1815 may be performed by a signal component 1335 as described with reference to Figure 13 the signal component 1335 described above.

[0231] An overview of aspects of the present disclosure is provided below:

[0232] Aspect 1: A method for wireless communication at a UE, comprising: receiving, from a network entity, a configuration for multiplexing SRS with a data signal in time and frequency; receiving, from the network entity, an assignment of a plurality of time-frequency resources for transmission of the SRS; multiplexing the SRS with the data signal across the assigned plurality of time-frequency resources according to the received configuration; and transmitting the multiplexed SRS to the network entity.

[0233] Aspect 2: The method according to aspect 1, wherein multiplexing the SRS with the data signal comprises: receiving, from the network entity, an indication to rate-match the data signal around the SRS; in response to receiving the indication, rate-matching the data signal around the SRS; and multiplexing the SRS with the rate-matched data signal across the assigned plurality of time-frequency resources.

[0234] Aspect 3: The method according to aspect 2, wherein rate-matching the data signal around the SRS comprises: receiving, from the network entity, an indication of a comb pattern that identifies resource blocks within the assigned plurality of time-frequency resources to be used at the UE for transmission of the SRS; and rate-matching the data signal around the SRS across the assigned plurality of time-frequency resources according to the indicated comb pattern.

[0235] Aspect 4: The method according to aspect 1, wherein multiplexing the SRS with the data signal comprises: receiving, from the network entity, an indication of a comb pattern and a frequency offset associated with the comb pattern, the comb pattern and frequency offset identifying resource blocks within the assigned plurality of time-frequency resources to be used at the UE for transmission of the SRS; and multiplexing the SRS with the data signal across the assigned plurality of time-frequency resources according to the indicated comb pattern and frequency offset.

[0236] Aspect 5: The method according to aspect 1, wherein multiplexing the SRS with the data signal comprises: encoding the SRS using a first covering code; encoding the data signal using a second covering code orthogonal to the first covering code; and multiplexing the SRS with the data signal across the assigned plurality of time-frequency resources.

[0237] Aspect 6: The method according to aspect 1, wherein multiplexing the SRS with the data signal comprises: multiplexing the SRS with the data signal and at least one DMRS across the assigned plurality of time-frequency resources.

[0238] Aspect 7: The method according to aspect 1, wherein multiplexing the SRS with the data signal includes: receiving, from the network entity, an indication of a resource block to be used at the UE for transmission of the SRS within a plurality of assigned time-frequency resources; and multiplexing the SRS with the data signal across the indicated resource blocks within the plurality of assigned time-frequency resources, wherein the SRS occupies a first portion of the indicated resource block and the data signal occupies a second portion of the indicated resource block.

[0239] Aspect 8: The method according to any one of aspects 1 to 7, wherein the SRS is used at the network entity for estimating a channel for wireless communication between the UE and the network entity; sensing, at the network entity, an environment associated with the UE, or identifying, at the network entity, a location of the UE.

[0240] Aspect 9: The method according to any one of aspects 1 to 8, wherein the data signal includes a PUCCH signal or a PUSCH signal.

[0241] Aspect 10: A method for wireless communication at a UE, including: receiving, from a network entity, a configuration for multiplexing a plurality of reference signals in a Doppler domain; receiving, from the network entity, an assignment of a plurality of time-frequency resources for transmission of the plurality of reference signals; multiplexing the plurality of reference signals across the assigned plurality of time-frequency resources according to the received configuration; and transmitting the multiplexed plurality of reference signals to the network entity.

[0242] Aspect 11: The method according to aspect 10, wherein multiplexing the plurality of reference signals includes: receiving, from the network entity, an indication of a plurality of phase codes for multiplexing the plurality of reference signals in the Doppler domain; and using the indicated plurality of phase codes to multiplex the plurality of reference signals.

[0243] Aspect 12: The method according to aspect 11, wherein using the indicated plurality of phase codes to multiplex the plurality of reference signals includes: multiplexing each reference signal of the plurality of reference signals with a corresponding phase code of the indicated plurality of phase codes.

[0244] Aspect 13: The method according to aspect 12, wherein each corresponding phase code is at least partially based on a corresponding antenna port among a plurality of antenna ports at the UE and a corresponding symbol within the assigned plurality of time-frequency resources.

[0245] Aspect 14: The method according to any one of Aspects 10 to 13, wherein the plurality of reference signals are sent to the network entity for estimating, at the network entity, a channel for wireless communication between the UE and the network entity, sensing an environment associated with the UE at the network entity, or identifying a location of the UE at the network entity.

[0246] Aspect 15: The method according to any one of Aspects 10 to 14, wherein the plurality of reference signals include SRS, PRS, or sensing reference signals.

[0247] Aspect 16: A method for wireless communication at a network entity, comprising: outputting, to a UE, a configuration for multiplexing SRS with a data signal in time and frequency; outputting, to the UE, an assignment of a plurality of time-frequency resources for transmission of the SRS; and obtaining, from the UE, the SRS and the data signal, wherein the obtained SRS and the obtained data signal are multiplexed across the assigned plurality of time-frequency resources according to the output configuration.

[0248] Aspect 17: The method according to Aspect 16, wherein outputting the configuration comprises: outputting, to the UE, an indication of a comb pattern that identifies resource blocks within the assigned plurality of time-frequency resources to be used at the UE for transmission of the SRS, wherein rate matching of the obtained data signal is performed around the SRS according to the indicated comb pattern.

[0249] Aspect 18: The method according to Aspect 17, further comprising: outputting, to the UE, an indication to perform rate matching of the data signal around the SRS according to the indicated comb pattern, wherein obtaining the data signal is at least partially based on the output indication.

[0250] Aspect 19: The method according to Aspect 16, wherein outputting the configuration comprises: outputting, to the UE, an indication of a comb pattern and a frequency offset that identify resource blocks within the assigned plurality of time-frequency resources to be used at the UE for transmission of the SRS, wherein the obtained SRS is multiplexed according to the indicated comb pattern and frequency offset.

[0251] Aspect 20: The method according to Aspect 16, wherein the obtained SRS is encoded using a first covering code, and the obtained data signal is encoded using a second covering code orthogonal to the first covering code.

[0252] Aspect 21: The method according to Aspect 16, further comprising: obtaining, from the UE, DMRS, wherein the obtained DMRS is multiplexed with the obtained SRS and the obtained data signal across the assigned plurality of time-frequency resources.

[0253] Aspect 22: The method according to aspect 16, wherein outputting the configuration comprises: outputting to the UE an indication of a resource block within the assigned plurality of time-frequency resources to be used at the UE for transmission of the SRS, wherein the obtained SRS occupies a first portion of the indicated resource block, and the obtained data signal occupies a second portion of the indicated resource block.

[0254] Aspect 23: The method according to any one of aspects 16 to 22, further comprising: estimating a channel for wireless communication between the UE and the network entity at least in part based on the obtained SRS; identifying a location of the UE at least in part based on the SRS; or sensing an environment associated with the UE at least in part based on the obtained SRS.

[0255] Aspect 24: The method according to aspect 23, wherein sensing the environment associated with the UE comprises: sensing the environment associated with the UE using a MIMO radar.

[0256] Aspect 25: The method according to any one of aspects 16 to 24, wherein the data signal comprises a PUCCH signal or a PUSCH signal.

[0257] Aspect 26: A method for wireless communication at a network entity, comprising: outputting to a UE a configuration for multiplexing a plurality of reference signals in a Doppler domain; outputting to the UE an assignment of a plurality of time-frequency resources for transmission of the plurality of reference signals; and obtaining the plurality of reference signals from the UE, wherein the obtained plurality of reference signals are multiplexed across the assigned plurality of time-frequency resources according to the output configuration.

[0258] Aspect 27: The method according to aspect 26, further comprising: outputting to the UE an indication of a plurality of phase codes for multiplexing the plurality of reference signals, wherein each obtained reference signal among the obtained plurality of reference signals is multiplexed using a corresponding phase code among the indicated plurality of phase codes.

[0259] Aspect 28: The method according to aspect 27, wherein each phase code among the plurality of phase codes corresponds to a respective antenna port among a plurality of antenna ports at the UE and a respective symbol within the assigned plurality of time-frequency resources.

[0260] Aspect 29: The method according to any one of aspects 26 to 28, wherein the plurality of reference signals are used at the network entity for estimating a channel for wireless communication between the UE and the network entity, sensing an environment associated with the UE, or identifying a location of the UE.

[0261] Aspect 30: The method according to any one of aspects 26 to 29, wherein the plurality of reference signals includes SRS, PRS, or a sensing reference signal.

[0262] Aspect 31: An apparatus for wireless communication at a UE, the apparatus including a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to any one of aspects 1 to 9.

[0263] Aspect 32: An apparatus for wireless communication at a UE, the apparatus including at least one component for performing the method according to any one of aspects 1 to 9.

[0264] Aspect 33: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code including instructions executable by a processor to perform the method according to any one of aspects 1 to 9.

[0265] Aspect 34: An apparatus for wireless communication at a UE, the apparatus including a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to any one of aspects 10 to 15.

[0266] Aspect 35: An apparatus for wireless communication at a UE, the apparatus including at least one component for performing the method according to any one of aspects 10 to 15.

[0267] Aspect 36: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code including instructions executable by a processor to perform the method according to any one of aspects 10 to 15.

[0268] Aspect 37: An apparatus for wireless communication at a network entity, the apparatus including a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to any one of aspects 16 to 25.

[0269] Aspect 38: An apparatus for wireless communication at a network entity, the apparatus including at least one component for performing the method according to any one of aspects 16 to 25.

[0270] Aspect 39: A non-transitory computer-readable medium storing code for wireless communication at a network entity, the code including instructions executable by a processor to perform the method according to any one of Aspects 16 to 25.

[0271] Aspect 40: An apparatus for wireless communication at a network entity, the apparatus including a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to any one of Aspects 26 to 30.

[0272] Aspect 41: An apparatus for wireless communication at a network entity, the apparatus including at least one component for performing the method according to any one of Aspects 26 to 30.

[0273] Aspect 42: A non-transitory computer-readable medium storing code for wireless communication at a network entity, the code including instructions executable by a processor to perform the method according to any one of Aspects 26 to 30.

[0274] It should be noted that the methods described herein depict possible specific implementations, and the operations and steps may be rearranged or otherwise modified and other specific implementations are possible. Additionally, aspects from two or more methods may be combined.

[0275] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes and the LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communication systems such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0276] The information and signals described herein may be represented using any of a variety of different technologies and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips referred to throughout the specification may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0277] The various illustrative blocks and components described in connection with the disclosure herein can be implemented or performed using a general purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0278] The functions described herein can be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions can be stored as one or more instructions or code on a computer-readable medium or transmitted using one or more instructions or code on a computer-readable medium. Other examples and specific implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein can be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination of these items. The features implementing the functions can also be physically located in different places, including being distributed such that portions of the functions are implemented at different physical locations.

[0279] A computer-readable medium includes both a non-transitory computer storage medium and a communication medium, where the communication medium includes any medium that facilitates transfer of a computer program from one location to another. The non-transitory storage medium can be any available medium that can be accessed by a general or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc read-only memory (CD-ROM) or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code components in the form of instructions or data structures and that can be accessed by a general or special purpose computer or a general or special purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if software is transmitted using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc. A disk can magnetically reproduce data, and a disc can optically reproduce data using lasers. Combinations of the above are also included within the scope of computer-readable media.

[0280] As used herein (including in the claims), the "or" used in a list of items (e.g., a list of items accompanied by phrases such as "at least one of" or "one or more of") indicates an inclusive listing such that, for example, a listing of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Additionally, as used herein, the phrase "based on" should not be construed as a reference to a closed set of conditions. For example, an example step described as "based on condition A" can be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0281] The term "determine" encompasses a variety of actions, and thus, "determine" can include operations, calculations, processing, derivations, inquiries, lookups (such as looking up in a table, database, or other data structure), ascertainments, and similar actions. Additionally, "determine" can include receiving (e.g., receiving information), accessing (e.g., accessing data stored in a memory), etc. Further, "determine" can include parsing, obtaining, selecting, choosing, establishing, and other such similar actions.

[0282] In the drawings, like components or features may have the same reference label. Additionally, various components of the same type may be distinguished by adding a dash and a second label used to differentiate between like components after the reference label. If only the first reference label is used in the specification, the description may apply to any one of the like components having the same first reference label, regardless of the second reference label or any other subsequent reference labels.

[0283] The description set forth herein in conjunction with the drawings describes exemplary configurations and does not represent all examples that may be implemented or that are within the scope of the claims. The term "exemplary" as used herein means "serving as an example, instance, or illustration" and does not mean "preferred" or "advantageous over other examples". The detailed description includes specific details for providing an understanding of the described techniques. However, the techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0284] The present description is provided to enable a person of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein and is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a User Equipment (UE), comprising: receiving, from a network entity, a configuration for multiplexing a sounding reference signal with a data signal in time and frequency; receiving, from the network entity, an assignment of a plurality of time-frequency resources for transmission of the sounding reference signal; multiplexing the sounding reference signal with the data signal across the assigned plurality of time-frequency resources according to the received configuration; and transmitting the multiplexed sounding reference signal to the network entity.

2. The method according to claim 1, wherein multiplexing the sounding reference signal with the data signal comprises: receiving, from the network entity, an indication to rate-match the data signal around the sounding reference signal; in response to receiving the indication, rate-matching the data signal around the sounding reference signal; and multiplexing the sounding reference signal with the rate-matched data signal across the assigned plurality of time-frequency resources.

3. The method according to claim 2, wherein rate-matching the data signal around the sounding reference signal comprises: receiving, from the network entity, an indication of a comb pattern that identifies resource blocks within the assigned plurality of time-frequency resources to be used at the UE for transmission of the sounding reference signal; and rate-matching the data signal around the sounding reference signal across the assigned plurality of time-frequency resources according to the indicated comb pattern.

4. The method according to claim 1, wherein multiplexing the sounding reference signal with the data signal comprises: receiving, from the network entity, an indication of a comb pattern and a frequency offset associated with the comb pattern, the comb pattern and frequency offset identifying resource blocks within the assigned plurality of time-frequency resources to be used at the UE for transmission of the sounding reference signal; and multiplexing the sounding reference signal with the data signal across the assigned plurality of time-frequency resources according to the indicated comb pattern and frequency offset.

5. The method according to claim 1, wherein multiplexing the sounding reference signal with the data signal comprises: encoding the sounding reference signal using a first covering code; encoding the data signal using a second covering code orthogonal to the first covering code; and multiplexing the sounding reference signal with the data signal across the assigned plurality of time-frequency resources.

6. The method according to claim 1, wherein multiplexing the sounding reference signal with the data signal comprises: multiplexing the sounding reference signal with the data signal and at least one demodulation reference signal across the assigned plurality of time-frequency resources.

7. The method according to claim 1, wherein multiplexing the sounding reference signal with the data signal comprises: receiving, from the network entity, an indication of resource blocks within the assigned plurality of time-frequency resources to be used at the UE for transmission of the sounding reference signal; and Multiplex the sounding reference signal and the data signal within the indicated resource blocks across multiple time-frequency resources assigned by the network entity, where the sounding reference signal occupies a first portion of the indicated resource blocks, and the data signal occupies a second portion of the indicated resource blocks.

8. The method according to claim 1, wherein the sounding reference signal is used at the network entity for: Estimating a channel for wireless communication between the UE and the network entity at the network entity, Sensing an environment associated with the UE at the network entity, or Identifying a location of the UE at the network entity.

9. The method according to claim 1, wherein the data signal includes a physical uplink control channel signal or a physical uplink shared channel signal.

10. A method for wireless communication at a user equipment (UE), comprising: Receiving, from a network entity, a configuration for multiplexing multiple reference signals in the Doppler domain; Receiving, from the network entity, an assignment of multiple time-frequency resources for transmission of the multiple reference signals; Multiplexing the multiple reference signals across the assigned multiple time-frequency resources according to the received configuration; and Transmitting the multiplexed multiple reference signals to the network entity.

11. The method according to claim 10, wherein multiplexing the multiple reference signals comprises: Receiving, from the network entity, an indication of multiple phase codes for multiplexing the multiple reference signals in the Doppler domain; and Using the indicated multiple phase codes to multiplex the multiple reference signals.

12. The method according to claim 11, wherein using the indicated multiple phase codes to multiplex the multiple reference signals comprises: Multiplexing each reference signal among the multiple reference signals with a corresponding phase code among the indicated multiple phase codes.

13. The method according to claim 12, wherein each corresponding phase code is at least partially based on a corresponding antenna port among multiple antenna ports at the UE and a corresponding symbol within the assigned multiple time-frequency resources.

14. The method according to claim 10, wherein the multiple reference signals are transmitted to the network entity for: Estimating a channel for wireless communication between the UE and the network entity at the network entity, Sensing an environment associated with the UE at the network entity, or Identifying a location of the UE at the network entity.

15. The method according to claim 10, wherein the multiple reference signals include a sounding reference signal, a positioning reference signal, or a sensing reference signal.

16. A method for wireless communication at a network entity, comprising: Outputting, to a user equipment (UE), a configuration for multiplexing a sounding reference signal and a data signal in time and frequency; Outputting, to the UE, an assignment of multiple time-frequency resources for transmission of the sounding reference signal; and Obtaining the sounding reference signal and the data signal from the UE, wherein the obtained sounding reference signal and the obtained data signal are multiplexed across the assigned multiple time-frequency resources according to the output configuration.

17. The method according to claim 16, wherein outputting the configuration comprises: outputting to the UE an indication of a comb pattern that identifies resource blocks within the assigned plurality of time-frequency resources to be used at the UE for transmission of the sounding reference signal, wherein rate matching of the obtained data signal is performed around the sounding reference signal according to the indicated comb pattern.

18. The method according to claim 17, further comprises: outputting to the UE an indication to perform rate matching of the data signal around the sounding reference signal according to the indicated comb pattern, wherein obtaining the data signal is at least partially based on the output indication.

19. The method according to claim 16, wherein outputting the configuration comprises: outputting to the UE an indication of a comb pattern and a frequency offset that identify resource blocks within the assigned plurality of time-frequency resources to be used at the UE for transmission of the sounding reference signal, wherein the obtained sounding reference signals are multiplexed according to the indicated comb pattern and frequency offset.

20. The method according to claim 16, wherein the obtained sounding reference signal is encoded using a first covering code, and the obtained data signal is encoded using a second covering code orthogonal to the first covering code.

21. The method according to claim 16, further comprises: obtaining a demodulation reference signal from the UE, wherein the obtained demodulation reference signal is multiplexed with the obtained sounding reference signal and the obtained data signal across the assigned plurality of time-frequency resources.

22. The method according to claim 16, wherein outputting the configuration comprises: outputting to the UE an indication of resource blocks within the assigned plurality of time-frequency resources to be used at the UE for transmission of the sounding reference signal, wherein the obtained sounding reference signal occupies a first portion of the indicated resource blocks, and the obtained data signal occupies a second portion of the indicated resource blocks.

23. The method according to claim 16, further comprises: estimating a channel for wireless communication between the UE and the network entity at least partially based on the obtained sounding reference signal; identifying a location of the UE at least partially based on the sounding reference signal; or sensing an environment associated with the UE at least partially based on the obtained sounding reference signal.

24. The method according to claim 23, wherein sensing the environment associated with the UE comprises: sensing the environment associated with the UE using a multiple-input and multiple-output radar.

25. The method according to claim 16, wherein the data signal comprises a physical uplink control channel signal or a physical uplink shared channel signal.

26. A method for wireless communication at a network entity, comprises: outputting to a user equipment (UE) a configuration for multiplexing a plurality of reference signals in a Doppler domain; outputting to the UE an assignment of a plurality of time-frequency resources for transmission of the plurality of reference signals; and Obtain the plurality of reference signals from the UE, wherein the obtained plurality of reference signals are multiplexed across the assigned plurality of time-frequency resources according to the output configuration.

27. The method according to claim 26, further comprising: Output an indication of a plurality of phase codes for multiplexing the plurality of reference signals to the UE, wherein each of the obtained plurality of reference signals is multiplexed using a corresponding phase code of the indicated plurality of phase codes.

28. The method according to claim 27, wherein each phase code of the plurality of phase codes corresponds to a respective antenna port among a plurality of antenna ports at the UE and a respective symbol within the assigned plurality of time-frequency resources.

29. The method according to claim 26, further comprising: Estimate a channel for wireless communication between the UE and the network entity at least in part based on the obtained plurality of reference signals; Identify a location of the UE at least in part based on the obtained plurality of reference signals; or Sense an environment associated with the UE at least in part based on the obtained plurality of reference signals.

30. The method according to claim 26, wherein the plurality of reference signals include sounding reference signals, positioning reference signals, or sensing reference signals.

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