Method and apparatus for codebook subset restriction

摘要

A method for operating a user equipment (UE) for channel state information (CSI) reporting in a wireless communication system comprises receiving, from a base station (BS), higher layer signaling including codebook subset restriction (CBSR) information, determining a bitmap sequence B based on the CBSR information, identifying, based on a portion of the bitmap sequence B, a restriction on P spatial domain (SD) vector groups out of a total of Q SD vector groups, generating a CSI report based on the P SD vector groups with the identified restriction and remaining Q minus P SD vector groups without any restrictions, and transmitting the CSI report to the BS, wherein the restriction on P SD vector groups corresponds to restricting an average amplitude (Aiavg) associated with an SD vector ai in the P SD vector groups to a maximum allowed average amplitude (γi).