Patent ID: 7573945
Filing Date: 2009-08-11
Classification: H04B,H04L,H04W

Abstract:
1. A method for communicating signals using radio frequency (RF) communication techniques, the method comprising: generating a receive filter matrix from a signal received by a plurality of antennas of a first communication device from a second communication device, the receive filter matrix comprised of a plurality of sub-matrices each being a convolution matrix derived from a receive filter sub-vector, wherein each receive filter sub-vector defines complex weights associated with a receive tapped-delay line filter for a corresponding one of the plurality of antennas of the first communication device; computing a principal eigenvector of a product of the receive filter matrix and a Hermitian of the receive filter matrix, the principal eigenvector comprised of a plurality of sub-vectors each having a length corresponding to a number of taps of a transmit tapped-delay line filter associated with a corresponding one of the plurality of antennas of the first communication device; generating from the plurality of sub-vectors of the principal eigenvector a plurality of transmit filter sub-vectors that form a transmit filter vector, each transmit filter sub-vector associated with a corresponding one of the plurality of antennas of the first communication device and defining complex weights associated with the transmit tapped-delay line filter for a corresponding one of the plurality of antennas of the first communication device; and applying the transmit filter vector at the first communication device to a signal to be transmitted from the first communication device to the second communication device.