WCDMA系统发送分集技术的性能分析

Performance of Transmit Diversity Schemes for WCDMA

本文针对WCDMA系统中的开环和闭环两类发送分集技术 ,给出了相干接收的算法模型、性能分析及仿真结果 ,进而揭示了这两类发送分集技术之间的关系 .理论分析及仿真结果表明 ,在总发送比特能量相同的条件下 ,闭环发送分集模式在步行环境下能提供比开环分集模式更好的接收性能 ;开环分集模式的接收性能则在车载环境下比闭环模式有更好的稳定性 .

In the updated WCDMA proposal, the transmit diversity schemes can be classified as open loop mode and closed loop mode. This paper presents the performances of these two schemes based on WCDMA system. Analytic and simulation results show that the closed loop mode outperforms the open loop mode at pedestrian speeds, while the open loop model performs better than the closed loop model at vehicular speeds.