Patent ID: 8315323

Claim:
A method of transmitting beamforming between a transmitter and a receiver in an orthogonal frequency division multiplexing (OFDM) wireless system having a plurality of subcarriers for a time varying fading channel comprising: performing successive beamforming for each of the plurality of subcarriers using less than complete knowledge of a plurality of previous fading blocks for each of the subcarriers by beamforming an adaptive codebook, C={c 1 ; . . . ; c 2 N }, of a current fading block for each of the subcarriers by correlating inter-frame and/or inter-subcarrier signals among the plurality of subcarriers, wherein performing successive beamforming for each of the plurality of subcarriers comprises performing successive beamforming based on interframe correlations within each subcarrier by successively beamforming on M out of the N s subcarriers at each frame in succession until a last subcarrier is reached and returning to the first subcarrier and repeating successive beamforming on M out of the N s subcarriers in a temporal round robin rotation among subcarriers.