Patent ID: 8891658

Claim:
A method of providing feedback information to a base station in a user equipment of a communication system based on MIMO, the method comprising: determining a first latest measured long-term covariance matrix according to a downlink channel matrix model; transmitting a quantization of a first latest estimated long-term covariance matrix corresponding to the first latest measured long-term covariance matrix to the base station; determining a second latest measured long-term covariance matrix according to a downlink channel matrix model; determining variation information of a second latest estimated long-term covariance matrix with respect to an estimated long-term covariance matrix of a last-time reset point; wherein, the second latest estimated long-term covariance matrix is derived according to the variation information and the estimated long-term covariance matrix of the last-time reset point approximates the second latest measured long-term covariance matrix; and transmitting a quantization of the variation information to the base station.