WCDMA中天线开环发分集模式STTD的性能分析  

Analysis of STTD Antenna Transmit Diversity for WCDMA

作　　者：杜志敏[1] 薛强[1] 吴伟陵[1] 

机构地区：[1]北京邮电大学信息工程学院,北京100876

出　　处：《北京邮电大学学报》2001年第1期47-51,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金!重大资助项目 ( 698962 4 3 )

摘　　要：推导了两种空时块编码发分集 (STTD)检测方法在平坦 Rayleigh信道中的理论性能 .仿真结果表明 ,当信道时变速率较小时 ,闭环发分集方案优于 STTD,但随着 Doppler频率的增加 ,闭环模式的性能迅速恶化 ,而 STTD受影响较小 ,故在高时变信道中更适宜采用 STTD方案 .Simple close form expressions for STTD's theoretical performance with or without channel estimation error in flat Rayleigh channel are derived. Simulation comparison between STTD and the two closed loop transmit diversity modes shows that when the maximal Doppler frequency is small the closed loop modes have better performance, but when the Doppler frequency increases this doesn't hold. STTD tends to have a better performance in that case.

关 键 词：STTD天线 移动通信 性能分析 WCDMA 开环发分集模式 

分 类 号：TN929.533[电子电信—通信与信息系统]