协作中继系统中最优化端到端容量的中继选择机制  

Optimization relay selection scheme for end-to-end capacity in cooperative relaying systems

作　　者：朱小刚[1] 肖霖[2] 申晓晨[3] 

机构地区：[1]南昌大学软件学院,江西南昌330047 [2]南昌大学信息工程学院,江西南昌330031 [3]北京邮电大学信息与通信工程学院,北京100876

出　　处：《南昌大学学报（理科版）》2011年第5期504-507,共4页Journal of Nanchang University(Natural Science)

基　　金：江西省科技支撑计划(2010BGB00800)

摘　　要：在协作中继系统中,提出一种最优协作中继选择机制以最大化端到端信道容量。系统中的源端,中继及目的端均配置多天线,且中继采用解码转发中继协议。由于第一跳链路容量受限于两跳链路中容量最小的中继链路,本文提出了一种最大化第一跳链路容量的方法。基于两跳速率匹配且两跳容量最大化,给出了最佳的中继节点个数以及最佳中继选择,以最大化端到端容量提升无线资源利用率。仿真结果表明,提出的中继选择机制下获得的端到端信道容量高于固定中继选择机制下的端到端信道容量。An optimal cooperative relay selection scheme is proposed that maximises the end-to-end link capacity in cooperative relaying systems.The source,destination and relay stations are deployed with multiple antennas and the decode-and-forward relaying protocol is used.Since the first hop link capacity is limited by the minimum relay link capacity between the two hop links,a novel process is given for maximising the first hop link capacity maximisation.Based on the data rate maximisation of the two hop links and matching the capacity of the two hop links,the optimal number of cooperative relay stations and which relay stations should be selected are determined in such a way to maximise the end to end capacity and improve the radio resource efficiency.The numerical simulation results show that the end-to-end capacity performance of the proposed relay selection scheme is much better than that of fixed relay selection scheme.

关 键 词：中继协作 中继选择 最大化容量 

分 类 号：TN929.53[电子电信—通信与信息系统]