作　　者： ; ; ;

机构地区： 华南理工大学电子与信息学院

出　　处： 《电子学报》 2010年第10期2410-2415,共6页

摘　　要： 本文基于机会中继协作通信系统的优良特性,改进了传统的多中继ARQ(Automatic Repeat Request)协作分集机制,联合物理层与数据链路层优化了无线频谱与能量的利用率,并且首次提出了采用Markov(马尔可夫)吸收链方法的端到端性能分析模型.在此分析模型的基础上,对本文改进的机会协作重传协议进行了端到端成功传输概率、丢包率、时延、吞吐量等性能参数的数值分析,最后用仿真实验对此模型进行了验证,详细讨论了最大重传次数、信道衰落参数、总发送功率等对性能的影响.结果表明,本文改进的机会协作重传协议在节能、抗信道衰落方面,表现出了比直接重传协议和传统的多中继协作重传协议具有更优越的性能. Based on the eminent characteristics of opportunistic relaying cooperative communication system,this paper improves the conventional multi-relay ARQ（Automatic Repeat Request）cooperative diversity scheme,and optimizes the utility of wireless spectrum and energy by designing physical layer and data link layer jointly.The end-to-end performance analytical model using absorbing Markov chain is firstly proposed.With the application of this proposed analytical model,we analyze our improved opportunistic cooperative retransmission protocol＇s performance parameters in terms of probability of end-to-end delivery success,probability of end-to-end delivery failure,delay,and throughput.Simulation results are finally provided to verify the correctness of our proposed analytical model,and the effects of the maximal retransmission times,channel fading parameters,and total transmission power on performance are discussed in detail.Our numerical results show that our improved opportunistic cooperative retransmission protocol has several desirable characteristics in energy saving and channel fading overcoming compared to other schemes,such as direct retransmission protocol and conventional multi-relay cooperative retransmission protocol.

关 键 词： 协作分集 机会中继 吸收链

领　　域： [自动化与计算机技术] [自动化与计算机技术]