一种1×2×4分布式空时编码异步协作方案  

1×2×4 Distributed STBC Asynchronous Cooperative Scheme

作　　者：陈建青[1] 葛利嘉[1] 郑鹤[1] 双涛[1] 

机构地区：[1]重庆通信学院应急通信重庆市重点实验室,重庆400035

出　　处：《电视技术》2013年第9期160-163,179,共5页Video Engineering

基　　金：国家自然科学基金项目(61271251);重庆市科技攻关计划项目(CSTC;2011AB2044);重庆市科委重点实验室专项;重庆邮电大学移动通信技术重点实验室开放研究基金项目

摘　　要：协作分集技术可以有效提高移动通信系统的容量和可靠性。针对时间异步的协作通信系统,提出一种基于分布式Alamouti STBC的1×2×4异步协作方案。对这种方案进行理论分析和算法推导,并且重新定义了中继节点归一化后的发射信号幅度。仿真结果表明,该方案的误比特率性能具有明显优势,能在时间异步的协作通信系统中很好地发挥多天线接收性能。The cooperative diversity technique can efficiently improve coverage and reliability of mobile communication systems. In this paper, a 1 × 2×4 time asynchronous cooperative scheme based on distributed Alamouti STBC is proposed. The theory analysis and algorithm derivation of the scheme are provided. In addition, the normalized range of transmitting signal at relay nodes is redefined. The simulation results demonstrate that the proposed scheme has better bit error rate （BER） performance and realizes multiple antennas receiving performance in time asynchronous cooperative communication system.

关 键 词：异步协作 多天线 正交频分复用 分布式Alamouti空时编码 

分 类 号：TN92[电子电信—通信与信息系统]