Patent ID: 8817634
Filing Date: 2014-08-26
Classification: H04B,H04L

Abstract:
1. A method for feeding back information of downlink channels to a base station, at a user terminal, in a wireless communication network, the method comprising: obtaining a transmission matrix of downlink channels from the base station to the user terminal; determining an approximately equivalent matrix of the transmission matrix of downlink channels based on the transmission matrix of downlink channels, a number of downlink data streams, a spatial correlation matrix of multiple transmitting antennas in the base station, and a predetermined codebook, wherein, the number of downlink data streams is m and there are N determining an equivalent matrix of the transmission matrix of downlink channels based on the transmission matrix of downlink channels and the number of downlink data streams, the equivalent matrix being a two-dimensional m×N determining the approximately equivalent matrix based on the equivalent matrix, the number of downlink data streams, the spatial correlation matrix, and the predetermined codebook, the approximately equivalent matrix being a two-dimensional m×N feeding back information concerning the approximately equivalent matrix to the base station.