Patent ID: 8559545
Filing Date: 2013-10-15
Classification: H04B,H04L

Abstract:
1. A channel information feedback method, adapted in a receiving end of a multiuser multiple input multiple output (MU MIMO) system, comprising: obtaining a subspace matrix and a magnitude matrix related to a transmitting end of the MU MIMO system according to a channel matrix corresponding to the receiving end; performing a first quantization on the subspace matrix to generate a quantized subspace matrix; performing a second quantization on an auxiliary information matrix to generate a quantized auxiliary information matrix, wherein the auxiliary information matrix is related to the magnitude matrix and a residual subspace matrix, and the residual subspace matrix has residual subspace information of the subspace matrix remained after the first quantization is performed on the subspace matrix; and feeding back the quantized subspace matrix and the quantized auxiliary information matrix to the transmitting end through an uplink channel.