CHANNEL STATE INFORMATION (CSI) FEEDBACK AND CODEBOOK SUBSAMPLING Russian patent published in 2017 - IPC H04B7/04 H04W28/06 H04J13/00 

FIELD: information technology.

SUBSTANCE: invention relates to a codebook for wireless or mobile communication systems and more specifically to transmission of feedback information for a codebook. Disclosed is a method implemented in a base station used in wireless communication system, which involves: receiving, from user equipment, rank indication (RI), first precoding matrix indicator (PMI) (codebook index i₁) and second PMI, wherein RI and first PMI are jointly encoded, wherein for RI=2 values of 8–15 are allocated for joint encoding of RI and first PMI (I_RI/PMI1).

EFFECT: enabling a decision on transfer, from user equipment to base station, of code feedback information.

18 cl, 7 dwg, 22 tbl