SUCCESSIVE TRANSMIT BEAMFORMING METHODS FOR MULTIPLE-ANTENNA ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEMS

摘要

An improvement in a method of transmit beamforming between a transmitter and a receiver in an OFDM wireless system having a plurality of subcarriers for a time varying fading channel comprises performing successive beamforming for each of the plurality of subcarriers using less than complete knowledge of the previous fading blocks for the subcarriers by beamforming an adaptive codebook, C = (C<SUB>1</SUB>; . . . ; c<SUB>2</SUB>