Patent ID: 7224758

Claim:
A method for adjusting antenna transmission weighting values in a communications system that utilizes multiple transmit antennas, said method comprising: (a) transmitting a first signal on a first multiplex channel via said multiple transmit antennas using a set of transmission weighting values; (b) transmitting a second signal on a second multiplex channel via said multiple transmit antennas using a set of perturbation weighting values; (c) receiving, from a receiver of the first and second signals, a response that indicates at least one of: whether the set of perturbation weighting values should be added to the set of transmission weighting values and whether the set of perturbation weighting values should be subtracted from the set of transmission weighting values; and (d) generating a new set of transmission weighting values based on the response received in step (c), wherein the first channel is different than the second channel.