瑞利衰落信道采用组合发射机SC/接收机MRC的MQAM性能分析  

Performance Analysis of MQAM with Combined Transmit SC/Receive MRC in Rayleigh Fading Channels

作　　者：李光球[1] 曹晓波[1] 

机构地区：[1]杭州电子工业学院通信工程分院,浙江杭州310037

出　　处：《电子学报》2003年第7期1080-1082,共3页Acta Electronica Sinica

基　　金：国家自然科学基金 (No .69972 0 1 4 );教育部<高等学校骨干教师资助计划>;浙江省自然科学基金 (No 60 0 0 68)

摘　　要：日益增长的无线业务需求要求提高衰落信道上无线通信的频谱利用率 .本文研究一种使用组合发射机SC/接收机MRC(SC/MRC)的MQAM方案 ,推导其在平坦瑞利衰落信道上的误符号率 ,分析无线信道时变特性对系统性能的影响 .The growing demand for wireless services creates the need for improving the spectral efficiency of wireless communications over fading channels. M-ary multilevel quadrature amplitude modulation (MQAM) in conjunction with transmit antenna selection combined with receive maximum-ratio combining is investigated. Based on alternative representations of Q(x), the average symbol error rate of this combined spatial diversity scheme over flat Rayleigh fading channels is derived, and the effects of the time-varying nature of the wireless channels on its performance are analyzed. Numerical results show that the scheme can achieve significant diversity gain over traditional receive diversity schemes by distributing the antennas over transmit and receive side.

关 键 词：正交幅度调制 瑞利衰落信道 最大比合并 选择合并 天线分集 

分 类 号：TN911.3[电子电信—通信与信息系统]