单播中继协议性能分析及中继选择  

Performance Analysis on the Unicasting Relay Protocol and Relay Selection

作　　者：龙航[1] 魏梅英[1] 申山山[1] 郑侃[1] 王文博[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

出　　处：《北京邮电大学学报》2010年第4期74-78,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60802082);"十一五"国家重大科技专项项目(2009ZX03003-008-01)

摘　　要：对多入多出多中继系统中的单播中继协议进行了性能分析,给出了接收信噪比表达式,该表达式可表示为中继节点前向/反向信道部分奇异值和部分奇异矢量夹角的函数.基于容量最大化准则,简化了单播中继协议的容量表达式,提出了基于瞬时信道状态信息和平均信道状态信息的中继节点选择方法,实现了信道信息反馈开销与系统各态历经容量之间的折中.The unicasting relay protocols in multi-input-multi-output multi-relay systems are analyzed. The expression of the received signal-to-noise ratio with unicasting relay protocols is derived,which is a function of some singular values and angles between singular vectors related to backward and forward channels. Based on the maximizing capacity criterion,the relay selection strategies with instantaneous and average channel state information are presented with simplifying the capacity expression. With average channel state information it is a trade-off scheme between the feedback overhead and the ergodic capacity performance.

关 键 词：协同中继 单播 性能分析 中继选择 

分 类 号：TN929.53[电子电信—通信与信息系统]