Recursive adaptive beamforming for wireless CDMA

The increasing demand for mobile communication services without corresponding increases in RF spectrum allocation requires new techniques to improve spectrum utilization. Spatial processing using antenna arrays at the base-station has been proposed to reduce co-channel interference and reduce fading of the desired signal, leading to an increase in system capacity. The use of base station antenna, arrays in wireless CDMA is studied. A recursive, fast, and numerically stable algorithm estimating the array response vector and the optimum beamforming weights is derived. Our approach uses a space-time processing approach for estimating-the array response vector, and hence the optimum beamforming weights. Simulation results are also presented