Patent ID: 8229017
Filing Date: 2012-07-24
Classification: H04B

Abstract:
1. A method of providing forward channel matrix information within a communication system, the communication system having i) a first transceiver device having a first plurality of antennas and ii) a second transceiver device having a second plurality of antennas, the method comprising: determining a channel estimation matrix describing a forward channel in which a signal travels from the first transceiver device to the second transceiver device; decomposing the channel estimation matrix to derive a unitary matrix and an upper triangular matrix at the second transceiver device; and transmitting at least a portion of the upper triangular matrix to the first transceiver device, wherein transmitting at least a portion of the upper triangular matrix further comprises transmitting diagonal and upper-diagonal matrix elements of the upper triangular matrix to the first transceiver device, wherein the upper triangular matrix is reconstructed from the diagonal and upper-diagonal matrix elements of the upper triangular matrix at the first transceiver device, wherein the upper triangular matrix is used to develop a precoding matrix, and wherein the precoding matrix is used to control transmission of a modulated signal via the first plurality of antennas.