Patent ID: 8503291
Filing Date: 2013-08-06
Classification: H04B

Abstract:
1. A method for directing a beam towards a receiving device, the method comprising: receiving, at the receiving device, the beam transmitted by a transmission source, the received beam being affected by an interference signal from an interfering source; computing, at the receiving device, a covariance matrix that represents a channel estimate associated with the interfering source; modifying, at the receiving device, a predetermined sounding signal by multiplying the predetermined sounding signal by a precoding matrix corresponding to a square root of an inverse of the covariance matrix, wherein the multiplying comprises using each of one or more antennas of the receiving device to apply a weight to the predetermined sounding signal, the weights corresponding to different columns of the precoding matrix; using the one or more antennas of the receiving device to transmit the modified predetermined sounding signal to the transmission source; and causing the transmission source to estimate an equivalent channel matrix based on (i) the predetermined sounding signal and (ii) the modified predetermined sounding signal, wherein the equivalent channel matrix represents (i) the channel estimate associated with the interfering source and (ii) a channel estimate associated with the transmission source.