Patent ID: 7907911
Filing Date: 2011-03-15
Classification: H04B

Abstract:
1. A method of controlling a radio frequency transmission, over a downlink to at least one mobile station user among a plurality of mobile station users, from a plurality of antennas associated with a base station in a wireless communication system, the method comprising: tracking, at the base station, a channel corresponding to the at least one mobile station user based on feedback information indicative of at least one complex channel gain seen by said at least one mobile station user, wherein the channel comprises tracking the channel using said at least one complex channel gain instead of feedback of each full channel of the user channels, the channel tracking comprising performing a real-time estimate of values of a matrix representation of the channel corresponding to said at least one mobile station user, the feedback information being provided at a rate selected by the base station; and scheduling, at the base station and for the at least one of the mobile station user, a directional downlink transmission based on the tracked channels of said plurality of mobile station users, said scheduling being performed using a proportionally fair algorithm.