ADVANCED CSI REPORTING IN ADVANCED WIRELESS COMMUNICATION SYSTEMS

摘要

A method of a user equipment (UE) for a channel state information (CSI) feedback in an advanced communication system. The method comprises receiving, from a base station (BS), CSI configuration information to report a wideband periodic CSI including a pre-coding matrix indicator (PMI), a rank indicator (RI) and a relative power indicator (RPI) based on a linear combination (LC) codebook, wherein the PMI comprises a first PMI (i1) indicating a plurality of beams and a second PMI (i2) indicating a plurality of weights for linear combination of the plurality of beams; determining, based on the CSI configuration information, the RI and the RPI indicating a power of weights assigned to the plurality of beams; and transmitting, to the BS over an uplink channel, a first CSI feedback comprising the RI and RPI in a first periodic reporting instance out of a plurality of periodic reporting instances.