一种可变放大增益MIMO放大转发中继系统的误码率分析  

Symbol error rate of a variable gain MIMO AF relay system

作　　者：刘敏[1] 曹张华[1] 

机构地区：[1]南通大学电子信息学院,江苏南通226019

出　　处：《苏州科技学院学报（自然科学版）》2013年第4期64-70,共7页Journal of Suzhou University of Science and Technology （Natural Science Edition）

基　　金：国家自然科学基金资助项目(61071086);江苏省高校自然科学基金资助项目(10KJB510020)

摘　　要：提出了一种可变放大增益MIMO放大转发中继方案,其中多天线节点同时进行天线选择与波束形成。为了降低系统复杂度与成本,节点选择两个天线进行波束形成。在瑞利衰落信道中分析了端到端误码率,在源节点与目的节点天线数量大于等于2时获得了误码率的封闭表达式。在高信噪比条件下得到了端到端误码率的渐进近似表达式,进而分析了系统分集阶数。最后采用MATLAB仿真工具进行了上述中继方案仿真,证明了解析结果的正确性。A variable gain MIMO AF relay scheme is proposed,in which multi-antenna nodes perform antenna selection and beam-forming simultaneously. To reduce complexity and cost, the nodes choose only two antennas before beam-forming. The end-to-end symbol error rate （SER） of the scheme is analyzed over Rayleigh fading channels. The closed expression of SER is obtained when the source and destination nodes have more than two antennas respectively. Besides, the asymptotically approximated expression of SER is gained under high SNR conditions,from which the diversity order of such a system is derived. Finally,simulations are performed by MATLAB and the analytical results are confirmed.

关 键 词：中继系统 放大转发 MIMO 误码率 

分 类 号：TN929.5[电子电信—通信与信息系统]