瑞利慢衰落信道下开环与闭环发射分集技术的性能分析  

Performance Analysis to Open and Close Loop Transmit Diversity Schemes in Slow Fading Rayleigh Channel

作　　者：蔡志光[1] 程型清[1] 李道本[1] 

机构地区：[1]北京邮电大学信息工程学院,北京100876

出　　处：《北京电子科技学院学报》2004年第2期31-37,共7页Journal of Beijing Electronic Science And Technology Institute

摘　　要：WCDMA标准在下行信道传输中采用了称作STTD的开环发射分集方案和两种反馈模式的闭环发射分集方案。本文对WCDMA中3种发射分集方案在瑞利慢衰落信道下的性能做理论分析,分别给出接收信噪比和误比特率的理论表达式,并以蒙特卡罗仿真加以验证。仿真结果表明,在理想信道估计情况下,闭环发射分集方案的性能优于STTD,三者中闭环发射分集模式二的性能最优。本文得出的结论对WCDMA标准的实际应用具有重要的指导意义。The open loop transmit diversity scheme, named as STTD, and two feedback close loop transmit diversity schemas in downlink channel communication was defined in WCDMA standard. The performance of the schemes in condition of slow fading rayleigh channel are theoretically analyzed, and the theoretical expression on reception SNR and bit rate are introduced in this paper. The comparison between Monte Carlo simulation and theoretical data shows that the closed loop transmit diversity modes have better performance than STTD scheme, and that the closed loop transmit diversity mode-2 is the most optimal. The results is meaningful to the application of WCDMA standard.

关 键 词：瑞利慢衰落信道 闭环发射分集 开环发射分集 WCDMA 

分 类 号：TN929.533[电子电信—通信与信息系统]