解码转发双向中继系统的ARQ协议研究  

Research on ARQ protocol for a decode-and-forward based two-way relay systems

作　　者：沈泉江 武卓[1] 郑国莘[1] 

机构地区：[1]上海大学特种光纤与光接入网省部共建重点实验室,上海200072

出　　处：《电子测量技术》2016年第6期176-180,共5页Electronic Measurement Technology

基　　金：国家自然科学基金重点项目(61132003);上海市科委重大项目(15511107203);上海市自然科学基金(14ZR1415100)资助项目

摘　　要：研究了结合自动请求重传的解码转发双向中继系统在瑞利衰落信道中的端到端误报率以及频谱效率等性能。双向中继系统的两个源节点及中继节点都有缓冲存储器用来存储重传时不同时隙的接收信号。根据错误发生的节点以及重传情况的不同,为了充分利用不同时隙的接收信号,分别结合使用了最小均方误差信号检测或者最大似然比合并算法。仿真结果表明,在解码转发双向中继系统中,相对于传统自动请求重传协议,采用增强ARQ协议能显著降低解码转发双向中继系统的误包率,从而提升系统的频谱效率。In this paper ,we investigate the performance of the two-way decode-and-forward （DF） relaying system with automatic repeat request （ARQ） protocol in Rayleigh fading channels .In the proposed ARQ scheme ,the ARQ process is carried out by all of the nodes including two source nodes and a relay node which have the buffers to store the signals received from different slots .In order to make full use of the received signals in diffident slots ,MMSE signal detection and maximal ratio combining （MRC） are used in the protocol where retransmission are requested according to different conditions and nodes .In addition ,simulation results show that the proposed protocol can improve the packet error rate （PER） and spectral efficiency of the DF based two-way relay system than the conventional ones .

关 键 词：解码转发 自动请求重传 双向中继 误包率 频谱效率 

分 类 号：TN925[电子电信—通信与信息系统]