Patent ID: 7444161
Filing Date: 2008-10-28
Classification: H04B,H04L,H04W

Abstract:
1. A method of adaptive weighting space-time transmit diversity, comprising: a. at a transmitting end of a base station, according to a certain regulation, space-time encoding symbols to be transmitted, every two input of which are made as a block, and then outputting two routes of signals; b. real-timely adjusting current transmission powers of two transmitting antennas respectively according to currently prescribed transmission power weight values, under the precondition of keeping the gross transmission power of two transmitting antennas invariable; c. after the transmission powers are determined, transmitting the space-time encoded output signals at the two independent antennas by a transmitting antenna array in terms of the current transmission powers; d. at a receiving end, estimating fading characters of two wireless channels by a receiver according to the present received signals, encoding fading amplitude characters of two wireless channels which are real numbers, and then feeding back to the transmitting end; e. at the transmitting end, receiving and obtaining the fading amplitude character information of two wireless channels through a feedback channel, calculating new adaptive transmission power weight values which are real numbers in the two transmitting channels, and adjusting the transmission powers according to the weight values; wherein calculating the new adaptive transmission power weight values w where h