Patent ID: 7248638
Filing Date: 2007-07-24
Classification: H04B,H04L

Abstract:
1. A method for use in wireless communication between a transmitter having plural transmit antennas and a receiver having plural receive antennas, said method comprising: (a) simultaneously transmitting to the receiver a first data stream using a first transmit antenna weight vector and a second data stream using a second transmit antenna weight vector; (b) transmitting to the receiver a first perturbation signal corresponding to the first transmit antenna weight vector and a second perturbation signal corresponding to the second transmit antenna weight vector; (c) receiving from the receiver feedback regarding the first transmit antenna weight vector and the second transmit antenna weight vector; and (d) utilizing the feedback to modify the first transmit antenna weight vector and the second transmit antenna weight vector, wherein at least two weights in the first transmit antenna weight vector and at least two weights in the second transit antenna weight vector are non-zero.