METHOD FOR IMPROVING THE PERFORMANCE OF A WIRELESS NETWORK UTILIZING BEAMFORMING WEIGHTING VECTORS

摘要

The present invention discloses a method for selecting one or more downlink beamforming vectors for a wireless channel to create beamformed signals. The method comprises estimating a downlink channel covariance matrix by using an uplink covariance matrix of the wireless channel, computing a plurality of downlink eigenvectors of a downlink channel by using the downlink channel covariance matrix, generating a plurality of downlink beamforming weighting vectors by using the plurality of downlink eigenvectors of the downlink channel, and selecting one or more dominant downlink beamforming weighting vectors from the plurality of downlink beamforming weighting vectors based on feedback from a mobile station (MS), wherein the downlink beamformed signals are created by applying the corresponding one or more dominant beamforming weighting vectors to an antenna array of a base transceiver station.