Downlink multi-beamforming control for the smart antennas of TD-SCDMA base stations

In this paper, we present a scheme for downlink multi-beamformer for time division synchronous code division multiple access (TD-SCDMA) base stations with smart antennas. For improving spatial resolution of the antenna array of the base stations, we propose a triangle antenna array model, and devise the corresponding downlink beamformer control algorithm by LMSE algorithm. The weight coefficients for the downlink beamformer are estimated by the feedback data from its uplink of the TD-SCDMA system. Simultaneously the performance analysis and the simulation results of the downlink beamformer for TD-SCDMA base stations are given. The results show that the control scheme for the smart antenna of TD-SCDMA systems can improve the performance of the systems effectively.