Patent ID: 7263132
Filing Date: 2007-08-28
Classification: H04B,H04L,H04W

Abstract:
1. A method for transmitting a stream of data symbols in a muitiple-input/multiple-output wireless communications system including N r transmitting antennas, comprising: demultiplexing the stream of data symbols into M sub-streams, where M=N space-time transmit diversity encoding each sub-stream into a pair of transmit signals; and dynamically allocating power to each transmit signal of each pair according to a corresponding feedback signal received from a receiver, the feedback signal including a ratio of magnitude sums of channel coefficients for channels used for the transmit signal, and the power of the pair of transmit signals being respectively weighted by positive real numbers w where h ij represent the channel coefficients for a channel between an i th transmitter antenna and a j th receiver antenna, where j is 1, . . . , N r .