相关阴影Rician信道上广义矩形MQAM的性能  

Performance of General Rectangular QAM over Correlated Shadowed Rician Fading Channels

作　　者：江林超[1] 李光球[1] 

机构地区：[1]杭州电子科技大学通信工程学院,杭州310018

出　　处：《无线通信技术》2009年第3期10-13,23,共5页Wireless Communication Technology

基　　金：国家自然科学基金项目(60772067);浙江省教育厅科技计划重点项目(20060268)

摘　　要：本文使用矩生成函数方法推导了相关视距(LOS)分量和独立散射分量条件下的多输入多输出阴影Rician衰落信道上采用正交空时分组编码(OSTBC)的广义矩形M进制正交幅度调制(MQAM)的平均误符号率(SEP)的精确闭合表达式。利用该表达式可计算信道衰落参数以及天线间的相关性对广义矩形MQAM平均SEP性能的影响。数值计算结果阐明,天线间的相关性恶化了广义矩形MQAM的平均SEP性能,广义矩形MQAM的平均SEP性能随着信道衰落参数的增大而得到改善。Using the moment closed- from average symbol generating function -based analysis approach, we derive the exact error probability （SEP） expression of orthogonal space - time block codes （OSTBCs） with general rectangular M -ary quadrature amplitude modulation （MQAM） over shadowed Rieian multiple- input multiple -output （MIMO） fading channel where the line -of- sight （LOS） component is correlated and the scattered component is spatially white. The above expressions can be used to investigate the impact of fading parameters and the correlation between the antennas on the average SEP of general rectangular MQAM. Numerical results show that the SEP performance of general rectangular MQAM deteriorates with increased correlation between the antennas, and improves with increased channel fading parameters.

关 键 词：误符号率 阴影Rician衰落 多输入多输出系统 正交空时分组码 

分 类 号：TN911[电子电信—通信与信息系统]