基于译码重传MIMO两跳中继系统遍历容量分析  

Ergodic capacity analysis for MIMO two-hop relay system based on decode-and-forward

作　　者：陈碧蓉[1] 张静[1] 董建萍[1] 

机构地区：[1]上海师范大学信息与机电工程学院,上海200234

出　　处：《上海师范大学学报（自然科学版）》2012年第4期358-363,共6页Journal of Shanghai Normal University(Natural Sciences)

基　　金：上海师范大学科研项目(sk201129)

摘　　要：在MIMO(multiple input multiple output)两跳中继系统下基于译码重传的中继协议,给出了遍历容量的分析.对于MIMO中继系统的无序特征值给出了概率密度函数的表达,通过该概率密度函数在新随机矩阵理论下求得的封闭解,得到了整个系统遍历容量的封闭解.该解适用于任意天线布置的源节点、中继节点以及目的节点.仿真结果发现遍历容量的理论分析和实际仿真结果吻合,较简单的放大重传中继协议,提高了遍历容量.This paper presents an ergodic capacity analysis of MIMO two-hop relaying systems based on the relay protocol of decode-and-forward.Firstly the expression for the probability density function of an unordered eigenvalue of the system is derived.Then a closed-form solution of the ergodic capacity of the entire system is given through the probability density function based on a new random matrix theory.This closed-form solution can be used not only to the SISO system but also to the source,relay and destination of arbitrary numbers of antennas.The result of simulations shows that the theory analysis matches the simulations and the ergodic capacity is improved in comparison with the simple relay protocol of amplify-and-forward.

关 键 词：MIMO中继 编码重传 概率密度函数 遍历容量 

分 类 号：TN929.5[电子电信—通信与信息系统]