Patent ID: 9178590
Filing Date: 2015-11-03
Classification: H04B,H04L

Abstract:
1. A channel information feedback method, adapted to a multi-antenna system, comprising: estimating, at a wireless communication device, parameters of a MIMO channel as a MIMO channel matrix based on signals received from a transmitter, and vectorizing the MIMO channel matrix into a first vector as an estimated MIMO channel representation; applying compressive sensing technique, at the wireless communication device, to take random measurements of the estimated MIMO channel representation by a pre-configured random matrix, so as to obtain compressive sensing measurements; and feeding back the compressive sensing measurements to the transmitter from the wireless communication device, wherein the step of applying the compressive sensing technique to take random measurements of the estimated MIMO channel representation by the pre-configured random matrix comprises: reducing, at the wireless communication device, dimension of the first vector from N to M by multiplying the first vector with a M×N pre-configured random matrix to obtain a second vector, wherein N>M and M and N are positive integers; wherein the step of feeding back the compressive sensing measurements to the transmitter comprises: transmitting, at the wireless communication device, the second vector to the transmitter; wherein before the step of reducing dimension of the first vector from N to M by multiplying the first vector with a M×N pre-configured random matrix to obtain the second vector, the channel information feedback method further comprises: