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Joint Beamforming and Precoding in TD-SCDMA Downlink System
Wanhong Ba,Xianzhong Xie 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
In this paper, beamforming and precoding is combined to improve the performance of TD-SCDMA downlink based on MIMO (Multiple-Input-Multiple-Output). We deduced beamforming vector and precoding matrix combined beamforming and precoding. And then, we compared beamforming scheme based signal-to-interference-plus-noise ratio (SINR) and based signal-to-leakage-plus-noise ratio (SLNR) in TD-SCDMA Downlink System. The performance of scheme with precoding based on SINR and SLNR outperform than the scheme without precoding. As the user number or the number of receive antenna increase, the beamforming scheme with precoding outperform the traditional beamforming still, and the beamforming precoding based on SLNR is superior gradually to the beamforming precoding based on SINR.