MIMO-X双向中继信道并存网络编码  

MIMO-X two-way relay channels coexisting network coding

作　　者：刘锋[1] 牛毅 曾连荪[1] LIU Feng;NIU Yi;ZENG Lian-sun(College of Information Engineering,Shanghai Maritime University,Shanghai 201306,China)

机构地区：[1]上海海事大学信息工程学院

出　　处：《计算机工程与设计》2019年第9期2401-2405,2450,共6页Computer Engineering and Design

基　　金：国家自然科学基金项目(61271283);上海教委科研创新基金项目(14YZ113)

摘　　要：针对K用户MIMO-X双向单中继信道并存模型,研究利用物理层网络编码技术实现用户间的信息交换,提出广义信号对齐(general signal alignment,GSA)方案,使MIMO通信系统的天线效率最大化。以半双工中继节点为参考,双向传输过程分为上行链路阶段和下行链路阶段,具体实现在并存网络中将各个用户间对发的消息在变换的子空间中对齐以消除干扰。仿真分析结果表明,与传统的信号空间对齐(signal space alignment,SSA)方案相比,在相同的用户数条件下,GSA方案具有更高的天线效率和复用增益。Aiming at the K user MIMO-X two-way single relay channel coexistence model,the physical layer network coding technology was used to realize the information exchange between users,a generalized signal alignment(GSA)scheme was proposed.The antenna efficiency of the MIMO communication system was maximized.Refer to the half-duplex relay node,the two-way transmission process was divided into an uplink phase and a downlink phase,specifically,in the coexisting network,the messages sent by each user were aligned in the transformed subspace to eliminate interference.Simulation analysis shows that the GSA scheme has higher antenna efficiency and larger multiplexing gain under the same number of users compared with the traditional signal space alignment(SSA).

关 键 词：多输入多输出X信道 天线效率 广义信号对齐 物理层网络编码 并存网络 

分 类 号：TN929.5[电子电信—通信与信息系统]