Patent ID: 7620114
Filing Date: 2009-11-17
Classification: H04B

Abstract:
1. A wireless communication system which carries out spatial multiplexing transmission with transmit and receive weights determined by utilizing a channel matrix with elements that are pairs of transmit antennas and receive antennas, the system comprising: a first communication device including a transmit weight separator; a second communication device configured to weight a reference signal with a first weight matrix U* to produce a weighted reference signal and transmit the weighted reference signal to the first communication device, the first weight matrix U* including a conjugate matrix of a second weight matrix U and produce the first weight matrix U* based on singular value decomposition of the channel matrix H in a direction from the first communication device to the second communication device; the transmit weight separator is configured to receive the weighted reference signal from the second communication device and separate the weighted reference signal into a third weight matrix V and a diagonal matrix D; and the first communication device is further configured to weight data with the third weight matrix V to produce weighted data and transmit the weighted data to the second communication device.