Patent ID: 7046978
Filing Date: 2006-05-16
Classification: H04B

Abstract:
1. A transmitter for transmitting a signal to a subscriber station through at least two transmit antennas, the transmitter comprising: means for transmitting a first pilot signal through a first transmit antenna; means for transmitting a second pilot signal through a second transmit antenna; means for receiving channel estimate information corresponding to said first and second pilot signals; means for generating delays and weights based on said channel estimate information, the delays corresponding to a plurality of signal paths to the subscriber station, the weights corresponding to the first and second antennas and to the plurality of signal paths; means for applying said delays and weights to data to produce delayed, weighted data; and means for summing the delayed, weighted data for the first and second antennas to transmit to the subscriber station, the delays causing the data transmitted on the plurality of signal paths to arrive at the subscriber station at substantially the same time, the weights causing the antennas to form a plurality of beam patterns with primary lobes along the plurality of signal paths such that a primary lobe of one beam pattern is placed nearly within a null between two lobes of another beam pattern.