结合零空间交与多播的K用户BC网络分析  

Analysis of the Kusers BC network with nullspace intersection and multicast

作　　者：王越 刘锋[1] 曾连荪[1] WANG Yue;LIU Feng;ZENG Liansun(College of Information Engineering,Shanghai Maritime Univ.,Shanghai 201306,China)

机构地区：[1]上海海事大学信息工程学院,上海201306

出　　处：《西安电子科技大学学报》2018年第2期135-140,共6页Journal of Xidian University

基　　金：国家自然科学基金资助项目(61271283);上海市教育委员会科研创新基金资助项目(14YZ113)

摘　　要：由于在多输入多输出网络中自由度受到干扰的影响,故提出一种多用户广播信道多播网络模型以及结合零空间交的迫零干扰消息的新方法.该模型采用"循环模式"为接收端分配期望消息,以构成多播网络;该迫零方法首先根据接收端的干扰消息获取对应的零空间,再取多个零空间的交空间,最后将多个干扰消息同时置于对应的交空间中,即可实现在每个接收端同时迫零多个干扰消息.对于同一个接收端只有一个干扰消息的情况,该迫零方案同样适用.对于该多用户系统,得到了最优天线配置方案及系统自由度的一般化结果.采用Matlab对该系统进行了仿真分析,系统自由度的理论值与仿真结果是一致的.This paper proposes a new method for the multi-user BC multicast network model and forcing-zero with nullspace intersection interference message.The model uses the 11 circular mode"to distribute the desired message to the receiving end to form a multicast network.The zero-forcing method first obtains the interference message from the receiver corresponding to the zero space,then takes a number of zero-space intersection spaces,and finally if a number of interference messages arc simultaneously placed in the corresponding cross-space,you can achieve multi-zero-forcing interference messages at the same time at each receiving terminal.For the multi-user system,the paper obtains the optimal antenna configuration scheme and the generalized result for system degrees of freedom.Based on the system using Matlab simulation analysis,the theoretical value of the degree of freedom and the simulation results arc in agreement.

关 键 词：广播信道 多播 迫零 零空间的交 自由度 

分 类 号：TN929.5[电子电信—通信与信息系统]