MIMO协作传输系统的中继选择及中断概率分析  

Relay Selection for MIMO Cooperative Networks and Outage Performance Analysis

作　　者：刘毅[1,2] 张建华[1,2] 李晓帆[1,2] 刘泽民[1] 

机构地区：[1]泛网无线通信教育部重点实验室(北京邮电大学),北京100876 [2]北京邮电大学无线新技术研究所,北京100876

出　　处：《北京邮电大学学报》2010年第5期51-55,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家高技术研究发展计划项目(2009AA011502);国家自然科学基金项目(60772113)

摘　　要：为实现多输入多输出(MIMO)再生中继网络中源节点和目的节点之间的协作传输,提出了一种中继选择算法.被选中的中继节点的两跳链路等效功率增益的最小值在所有备选中继节点中最大.针对该选择策略,采用一种理论近似的方法分析了其中断概率.基于这种协作策略还给出了在总功率受限的条件下,源节点和中继节点之间的功率分配方法.理论分析和仿真结果表明,该选择算法可显著降低系统中断概率.同时,分布式的选择算法在系统性能和复杂度之间取得了较好的平衡,是可使用的中继选择策略.A selection scheme is proposed for the cooperative transmission of multiple-input multiple-out-put （MIMO） regenerative cooperative system. Single relay node is selected to maximize the minimumcase channel power gain among all relay nodes. Outage performance is analyzed through an approximate method. Under this selection scheme, a simple power allocation method is also developed for the sum power constrained network. Analysis and simulation demonstrate that this scheme can achieve a significant improvement in terms of outage performance. A distributed selection scheme is proven to have a good balance between the system performance and the implementation complexity. Therefore, it is a promising choice for practical utilization.

关 键 词：协作通信 译码转发 中继选择 功率分配 

分 类 号：TN911.7[电子电信—通信与信息系统]