NUMBER OF NON-ZERO COEFFICIENTS REPORTING FOR TYPE II CSI CODEBOOK WITH FREQUENCY COMPRESSION

摘要

Certain aspects of the present disclosure provide techniques for channel state information (CSI) reporting with frequency compression. A method that can be performed by a user equipment (UE) includes receiving a CSI report configuration. The CSI report configuration configures the UE for reporting precoding matrix information including, for each layer, a plurality of selected beams L, a frequency domain compression matrix F for each of the L beams at each of a plurality of taps M in the time domain, and a subset of linear combination coefficients associated with the frequency domain compression matrices and beams. The UE reports in a first part of uplink control information (UCI), a total number of non-zero linear combination coefficients across all layers. The UE determines a payload size of a second part of the UCI based, at least in part, on the reported total numbers of non-zero coefficients.