Methods and systems are disclosed to enhance reporting of precoding matrix indication (PMI) associated with fast changing channel response by independently selecting time-domain (TD) or Doppler-domain (DD) basis vectors for different groupings of spatial-domain (SD) and frequency-domain (FD) basis vectors. A UE may generate PMI by applying TD/DD basis vectors in addition to the SD and FD basis vectors to increase the validity time of the PMI. To address the increased signaling overhead associated with the TD/DD components, the UE may group selected spatial beams and FD components to drop inactive spatial beams or inactive FD components based on the LC coefficient matrix. The UE may independently select TD or DD basis vectors for different paired groups of spatial beams and FD components and report the sub-selection of the spatial beams, FD components. and TD or DD component for each group, and the reduced dimension of the LC coefficient matrix.

Apparatus, methods, and computer program products for wireless communication are provided. An example method may include transmitting, for a second network entity, information indicative of partitioning of one or more subsets of codebooks in a configured set of codebooks and information indicative of one recommended subset of codebooks in the one or more subsets of codebooks, where each respective codebook in the set of codebooks corresponds to a respective precoder. The example method may further include receiving, in an uplink grant from the second network entity, information indicative of a selected codebook in the recommended subset of codebooks. The example method may further include transmitting a PUSCH transmission based on the selected codebook and the uplink grant.

Devices and methods for performing a beam management operation are provided in this disclosure. A radio communication device may include a transceiver that is configured to transmit a plurality of reference signals, each reference signal being beamformed based on a set of beamforming weights that is different from a set of beamforming weights of at least one other reference signal, and receive a plurality of measurement results representing measurements for at least some of the plurality of reference signals. The radio communication device may further include a processor that is configured to provide the plurality of measurement results to a machine learning model configured to determine a parameter for a beam management operation using a predefined codebook and perform the beam management operation according to the predefined codebook based on the determined parameter.

A method for operating a user equipment (UE) comprises receiving information about a downlink (DL) transmission transmitted from N.sub.RRH>1 RRHs, wherein: N.sub.RRH=number of remote radio heads (RRHs), RRH r comprises a group of antenna ports, and r=1, . . . , N.sub.RRH; receiving the DL transmission; and decoding the information about the DL transmission; wherein the DL transmission is based on a scheme that is a combination of a precoding scheme and a diversity scheme, wherein the precoding scheme corresponds to applying an intra-RRH precoder component to antenna ports within an RRH, and wherein the diversity scheme corresponds to applying an inter-RRH diversity component to antenna ports across RRHs.

A method, network node and wireless device for reducing overhead of New Radio (NR) Type II channel state information (CSI) feedback using angle and delay reciprocity are disclosed. According to one aspect, a method in a wireless device (WD) includes receiving a configuration of CSI report setting that indicates frequency domain basis vectors from a discrete Fourier transform, CSI reference signal (RS) ports and a subset of pairs of spatial domain and frequency domain vectors for the N.sub.CSI-RS CSI-RS ports. The method also includes determining linear combination coefficients corresponding to the selected frequency domain basis vectors and the selected subset of CSI-RS ports, determining linear combination coefficients corresponding to the selected frequency domain basis vectors and the selected subset of pairs of vectors in the spatial domain and the frequency domain.

Enhanced channel state information (CSI) reporting may include encoding a CSI reporting configuration associated with a first transmission and reception point (TRP) and a second TRP. The CSI reporting configuration may include at least one codebook configuration. The at least one codebook may include at least one of a rank restriction configuration or a codebook subset restriction (CBSR) configuration. The at least one of the rank restriction configuration or the CBSR configuration may correspond to at least one of a particular type of TRP measurement, a particular TRP of the first TRP or the second TRP, or channel measurement resources (CMRs) associated with at least one of the first TRP or the second TRP. A CSI measurement communication received from a user equipment (UE) may be decoded. The CSI measurement communication may be based on the decoded CSI reporting configuration.

Methods, apparatus, and systems for wireless communications utilizing a precoding matrix indicator (PMI) based on first signals received from a first node and based on second signals received from a second node are described. A wireless device may receive measurement information that indicates resources of a first node and a second node for use in determining the PMI. After receiving the first signals and the second signals, the wireless device may use the first signals and the second signals to determine the PMI. The determined PMI may be sent to a base station, which may transmit one or more packets based on the determined PMI.

Embodiments of the present disclosure relate to methods, devices and computer readable media for communication of a RS. According to embodiments of the present disclosure, the terminal device receives information indicating a set of resources for transmitting a reference signal from the network device. If the terminal device receives an indication in a first slot for triggering a transmission of the reference signal, the terminal device determines a second slot for transmitting the reference signal. The terminal device determines whether the second slot is valid based on a slot configuration. In this way, it can avoid the SRS transmission timing ambiguous or misalignment between terminal device and network.

Various aspects of the present disclosure relate to receiving an uplink transmit precoding matrix indicator (TPMI) based on coherence grouping. A user equipment (UE) may be configured to transmit a set of parameters corresponding to an antenna configuration of the UE, where the antenna configuration comprises information on an antenna grouping of the UE, or a coherence grouping across antenna ports of the UE, or both. The UE may be configured to transmit a set of sounding reference signals (SRSs) over the antenna ports based on the antenna configuration. The UE may be configured to receive at least one TPMI based on the set of SRSs, the TPMI corresponding to an uplink (UL) codebook-based transmission.

Disclosed are methods performed by a base station in a wireless communication system including identifying a number of orthogonal frequency division multiplexing (OFDM) symbols for a terminal; identifying downlink control information (DCI) format for the terminal; generating DCI for the terminal based on a resource allocation type and resource block group for data transmission of the terminal, wherein the resource allocation type is identified based on the DCI format; transmitting, to the terminal, the DCI; and transmitting, to the terminal, data corresponding to the DCI. The resource block group includes consecutive virtual resource blocks and a number of the consecutive virtual resource blocks is determined based on a size of a bandwidth and a configuration information by a higher layer signaling.