Patent ID: 11381295

Abstract:
A user equipment (UE) in a wireless communication system receives, from a base station (BS), CSI feedback configuration information; and deriving, based on the CSI feedback configuration information, the CSI feedback including a precoding matrix indicator (PMI), transmitting, to the BS via an uplink channel, the CSI feedback including the PMI, wherein, for each layer l=1, 2, . . . , v, the PMI indicates KNZ,l non-zero (NZ) coefficients out of a total of 2LMv coefficients, each of which is represented as cl,i,m=pl,i,m(1)pl,i,m(2)ϕl,i,m, the KNZ,l NZ coefficients are partitioned into two groups (G0 and G1), and for each group Gr, r∈{0,1}, one pl,i,m(1) value is indicated, where v is a rank value, pl,i,m(1) is a first amplitude coefficient, pl,i,m(2) is a second amplitude coefficient, and ϕl,i,m is a phase coefficient.