SUCCCESSIVE TRANSMIT BEAMFORMING METHODS

摘要

An improvement in a method of transmit beamforming between a transmitter and a receiver for a time varying fading channel comprises the step of performing transmitting beamforming using less than complete knowledge of the previous fading blocks to design a codebook 26a of a current fading block with each time frame. One embodiment comprises a successive beamforming algorithm and a second embodiment comprises a vector quantization beamforming algorithm. A fading parameter is determined at least in the transmitter or receiver by monitoring a mobile Doppler frequency.