Patent ID: 8306001
Filing Date: 2012-11-06
Classification: H04B,H04W

Abstract:
1. A method comprising: at a plurality of antennas of a first wireless communication device, receiving uplink transmissions sent from a second wireless communication device; generating a downlink beamforming weight vector from the received uplink transmissions; computing a covariance matrix based on at least one of the received uplink transmissions and the downlink beamforming weight vector; storing history information based on the covariance matrices for the received uplink transmissions; and computing first and second beamforming-space time code weight vectors based on the covariance matrix for an uplink transmission received in a current frame and the history information, wherein the first and second beamforming-space time code weight vectors are used for a beamforming-space time code transmission technique to send a downlink transmission to the second wireless communication device.