低信噪比下增强型解码转发协作的性能分析  

Performance of improved decode-and-forward cooperation in low SNR

作　　者：朱义君[1] 李瑛[1] 田忠骏[1] 陈晋央[1] 

机构地区：[1]信息工程大学信息工程学院,河南郑州450002

出　　处：《通信学报》2010年第2期81-85,共5页Journal on Communications

基　　金：国家自然科学基金资助项目(60872043);国家重大科技专项新一代宽带无线移动通信网基金资助项目(2009ZX03003-005-01)~~

摘　　要：研究了接收节点将其译码状态反馈给其他节点这一增强性手段对解码转发协作的性能改善情况。推导了低信噪比条件下,增量中继、选择中继的中断概率和吞吐量表达式,给出了中断概率的三阶近似式。结合增量中继、选择中继的各自优点,提出了一种联合中继模式。理论分析和数值仿真表明,提出的联合中继模式在中断概率和吞吐量2个方面性能优越。An enhancement was proposed that the receiving node feeds back its decoding state to the other nodes. Further, the enhancement can improve the performance of decode-and-forward cooperative diversity. The outage probability and throughput of incremental relay and selection relay were derived in low SNR, and the three-order approximation of outage probability was presented. Combined with the strong points of incremental relay and selection relay, joint relay was brought forward. The theoretical analysis and numerical simulation reveal that the proposed joint relay has such pre dominant performances as outage probability and throughput.

关 键 词：协作分集 解码转发 增量中继 选择中继 最大流最小集 

分 类 号：TN929.5[电子电信—通信与信息系统]