Cooperative transmission for wireless networks using power control and beamforming

One of the most promising techniques to increase wireless system capacity is the use of multiple antennas in transmission and reception. When multiple antennas are available only at the base station, the advanced processing algorithms for achieving high data rates in downlink must be supported almost exclusively by the transmitter. Spatial Division Multiple Access (SDMA) schemes have been widely used for this task, and its application together with power control for CDMA networks has obtained good results in order to increase system capacity. In this paper an extended algorithm using beamforming and power control, but allowing for cooperative transmission from all base stations to each active mobile is presented. Main advantages of this extension are discussed and some simulation results are presented.