Abstract: Aspects of the disclosure relate to the generation of channel state reports and precoding a wireless transmission based on frequency division duplex (FDD) reciprocity. A base station (BS) uses at least two precoders to transmit signals to A user equipment (UE). The UE generates a set of channel state reports, in which the UE transmits a first set of channel coefficients using a first timing, a set of port attributes using a second timing, and a second set of channel coefficients using a third timing. The first set of channel coefficients correspond to a first precoded portion of the wireless transmission, and the set of port attributes and the second set of channel coefficients correspond to a second portion of the wireless transmission. The BS modifies at least one of the precoders based on the channel state reports. Other aspects, embodiments, and features are also claimed and described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a transmission of a channel status information (CSI) report based at least in part on receiving a CSI request via PDCCH repetitions, based at least in part on transmitting the CSI report via PUCCH repetitions, or based at least in part on transmitting the CSI report via PUSCH repetitions. The UE may determine, based at least in part on the determined transmission of the CSI report, CSI processing criteria including one or more of a CSI processing timeline, a CSI processing unit occupation duration, a resource and port occupation duration, or a CSI reference resource slot. The UE may selectively transmit the CSI report based at least in part on the determined CSI processing criteria. Numerous other aspects are described.

Abstract: Port selection codebook enhancements are disclosed for spatial and frequency domain density (FDD) reciprocity. A base station may generate and signal a channel state information (CSI) report configuration including configuration of multiple CSI-reference signal (CSI-RS) port groups, wherein each group includes one or more CSI-RS ports, and each group is associated with one or more codebook subset restrictions (CBSRs). Using the configured restrictions of the CBSRs, served user equipments (UEs) may determine linear combination coefficient feedback based on channel measurements of selected port groups and signals the feedback to the base station. Once the base station receives the feedback it may then determine a hybrid CSI-RS codebook using both the configured CSI-RS port groups and the linear combination coefficients. The base station may then transmit downlink data encoded with a precoding matrix selected from the codebook. Other aspects and features are also claimed and described.

Abstract: Certain aspects of the present disclosure provide techniques for channel state information (CSI) reporting with frequency domain (FD) compression. A method that can be performed by a user equipment (UE) includes determining the size of the intermediate set based on one or more parameters included in the CSI report configuration, determining one or more FD bases for each layer based on the intermediate set, wherein the one or more FD bases are characterized by an M value indicative of a number of the one or more FD bases and based on the CSI report configuration, and reporting the one or more FD bases for each layer based on the size of the intermediate set.

Abstract: Methods, systems, and devices for wireless communications are described. A receiving device may receive, from a transmitting device, a configuration indicating a set of orbital angular momentum (OAM) modes for joint reporting, where at least one of the set of OAM modes is associated with transmission via two or more of a plurality of sets of antennas arranged in a set of concentric circular arrays. The receiving device may transmit, to the transmitting device, a report indicating precoding information for each of at least a subset of the set of OAM modes, where the precoding information includes one or more first parameters common to the set of OAM modes and one or more second parameters for respective ones of the at least the subset of the set of OAM modes.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may evaluate the plurality of hypotheses based at least in part on the set of power control offset ratios and on a set of evaluation metrics to select at least one of the plurality of hypotheses. Numerous other aspects are provided.

Abstract: A device may receive, from a base station, a channel state information (CSI) reference signal on at least one of a first set of frequency units or a first set of antenna ports. The first set of frequency units or the first set of antenna ports may include less than all available frequency units or less than all available antenna ports. The device may generate a CSI based on the CSI reference signal and transmit information associated with the CSI on a second set of frequency units or a second set of antenna ports for use in reconstructing the CSI on a third set of frequency units or a third set of antenna ports. The second set of frequency units or the second set of antenna ports may include less than all available frequency units or less than all available antenna ports.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a transport block size based at least in part on a set of physical uplink shared channel resources corresponding to a set of physical uplink shared channel repetitions that are indicated to be transmitted over at least one repetition unit in accordance with a frequency hopping pattern and at least one code block mapping order corresponding to the at least one repetition unit. The UE may transmit the set of physical uplink shared channel repetitions based at least in part on the transport block size. Numerous other aspects are provided.

Abstract: Certain aspects of the present application relate to techniques for configuring and/or performing channel state information-reference signal (CSI-RS) resource aggregation. For example, the techniques described herein enable multiple resource mappings within a single CSI-RS resource. These multiple mappings may facilitate the aggregation of a greater number of CSI-RS resources, thereby supporting a larger number of CSI-RS ports. A user equipment (UE) may then perform CSI measurements using this expanded set of CSI-RS ports.

Abstract: Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may transmit a trigger message to a second UE, where the trigger message triggers a channel state information (CSI) report that includes a first CSI reporting mode of a set of CSI reporting modes and a reporting quantity for the first CSI reporting mode. For a first reporting quantity, the first UE may trigger the second UE to transmit a CSI reference signal (RS), and the first UE may then receive the CSI-RS to determine CSI based on the CSI-RS. Additionally or alternatively, for other reporting quantities, the first UE may transmit the CSI-RS to the second UE, and the second UE may transmit channel state feedback to the first UE based on measuring CSI for the received CSI-RS, where the first UE determines the CSI based on the channel state feedback.

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for transmitting a channel state information (CSI) report from a user equipment (UE). The CSI report may be a UE initiated CSI report or may be based on a downlink grant. The UE may determine to transmit the CSI report based on measurement using a physical downlink control channel (PDSCH) and/or a demodulation reference signal (DMRS). The UE may determine a reference resource for CSI feedback. The UE may calculate a channel quality indicator (CQI) based on the reference resource. The UE may transmit the CQI in the CSI report on an uplink resource.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may indicate, to a base station, a capability of the UE to use a channel measurement resource for both a joint transmission hypothesis and a single transmission hypothesis. The UE may receive, based on indicating the capability of the UE, a configuration message indicating a first channel measurement resource that is associated with a first transmission configuration indicator state and that is configured for a first joint transmission hypothesis. The UE may obtain a channel measurement for both the first joint transmission hypothesis and a first single transmission hypothesis using the first channel measurement resource based on the configuration message.

Abstract: A user equipment (UE) may receive, from a base station, a sounding reference signal (SRS) configuration indicating at least two resource allocations for each SRS resource of an SRS resource set, and each of the at least two resource allocations may include a time resource allocation and a frequency resource allocation. The UE may further transmit, to the base station, an SRS on a respective SRS resource of the SRS resource set based on one of the at least two resource allocations for the respective SRS resource. The base station may transmit, to the UE, the SRS configuration indicating at least two resource allocations for each SRS resource of an SRS resource set, and receive, from the UE, the SRS on a respective SRS resource of the SRS resource set based on the one of the at least two resource allocations for the respective SRS resource.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may obtain data samples for a first machine learning model associated with a task at the UE. The first set of parameters may be associated with the first machine learning model. The UE may transmit a capability message indicating a capability of the UE to perform a tuning procedure of the first machine learning model, and the UE may perform the tuning procedure of the first machine learning model to obtain a second set of parameters associated with the first machine learning model based on the capability of the UE to perform the tuning procedure of the first machine learning model. The capability of the UE to perform the tuning procedure may be one of an online tuning capability or an offline tuning capability.

Abstract: Methods, systems, and devices for wireless communications are described. Techniques described my support dedicated codebooks for sparse antenna arrays, and channel state information (CSI) reporting procedures with reduced overhead. Precoding matrix indicator (PMI) reporting (e.g., in a CSI report) may be based on such dedicated codebook structures. For a CSI report for sparse antenna arrays, each precoding vector for each transmission layer may be constructed from two sub-vectors. Each sub-vector may include an overlapping entry (e.g., one entry in the first sub-vector is the same as one entry in the other sub-vector). Each sub-vector may correspond to an antenna subarray. The overlapping entry may correspond to a same antenna element in both of the two subarrays. The network may provide a UE with an indication of a sparse codebook type, and one or more parameter values for the sparse codebook type.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may perform a measurement on a reference signal. Accordingly, the UE may transmit a meta indicator. The meta indicator may represent one or more properties associated with processing of the reference signal at the UE. Numerous other aspects are described.

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for transmitting a channel state information (CSI) report from a user equipment (UE). The CSI report may be a UE initiated CSI report or may be based on a downlink grant. The UE may receive a downlink grant scheduling a physical downlink shared channel (PDSCH) and a demodulation reference signal (DMRS). The UE may determine to report a CSI in response to a measurement of a downlink measurement resource or in response to the downlink grant requesting the CSI. The UE may determine a reserved uplink resource on which to report the CSI. The UE may transmit a CSI report on the reserved uplink resource.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) and a base station may perform one or more operations for receive antenna switching. For example, a UE may receive a set of reference signals from a base station using one or more ports of the UE. Based on receiving the set of reference signals, the UE may generate channel state information (CSI) associated with a set of antenna ports. In some cases, the UE may generate CSI based on receiving a configuration indicating the set of antenna ports. The UE may transmit, to the base station, a CSI report including the CSI information associated with the set of antenna ports and an indication of the associated antenna ports. The base station may receive the CSI report and may communicate with the UE using a set of precoders associated with the set of indicated antennas ports.

Abstract: Methods, systems, and devices for wireless communications are described. A network entity may perform rate splitting on a first message for a first user equipment (UE) and a second message for a second UE. The first message may include a first common portion and a first private portion and the second message may include a second common portion and a second private portion, where the rate splitting may include combining the first common portion and the second common portion to be a third common portion. The network entity may perform a first mapping operation to map the third common portion to one or more first physical resource blocks (PRBs) and perform a second mapping operation to map the first private portion to one or more second PRBs. The network entity may transmit the third common portion and the first private portion to the first UE via the first message.

Abstract: Wireless communication devices, systems, and methods related to managing artificial intelligence (AI) and/or machine learning (ML) models are provided. For example, a method of wireless communication performed by a network unit may include transmitting, to one or more first user equipments (UEs), an indication of a first group identifier, wherein the first group identifier is based, at least in part, on one or more first machine learning (ML) models associated with the one or more first UEs; and transmitting, to at least one UE of the one or more first UEs, a first group-based signal associated with the first group identifier.