纯多播BC信道并存单播MAC信道的天线效率研究  

Research on Antenna Efficiency of Unicast MAC Channel Coexisting on Pure Multicast BC Channel

作　　者：于振超 刘锋[2] YU Zhen-chao;LIU Feng(CETSDEC,Jinan 250000;School of Information Engineering,Shanghai Maritime University,Shanghai 201306)

机构地区：[1]中电装备山东电子有限公司,济南250000 [2]上海海事大学信息工程学院,上海201306

出　　处：《现代计算机》2019年第26期21-26,共6页Modern Computer

摘　　要：随着无线通信新业务的出现,新媒体等日新月异的更新换代,这将给日渐匮乏的无线频谱资源的利用率提出极大的挑战。然而多天线系统能够提供最佳天线配比以及提高频谱利用率,增加信号空间复用增益,实现更高的天线效率。研究基于纯多播BC信道并存单播MAC信道的模型,首先分析有K个接收端的BC信道并存有N个发送端MAC信道的一般情况模型,然后举例分析有3个接收端的BC信道并存有3个发送端的MAC信道的特殊模型。运用迫零方法,设计发送端的预编码矢量,运用线性预编码算法消除网络内以及网络间的干扰消息,最后解码出期望信号与理想信号对比,并且模型的空间复用增益结果通过MATLAB仿真呈现,发现与理想值非常接近,得出每个模型的天线效率,并表明所提出的分析方法准确可靠。With the emergence of new wireless communications business,new media and other ever-changing replacement,which will increasingly scarce wireless spectrum resources utilization put forward a great challenge.However,the multi-antenna system can provide the best anten na ratio and improve the spectrum utilization,increase the signal space reuse gain,to achieve higher antenna efficiency.Studies the model of unicast MAC channel based on pure multicast BC channel,firstly,analyzes the general situation model of the MAC channel with K trans mit ends on the BC channel with N receivers.Then analyzes the special model of the MAC channel with three transmit ends on the BC channel with three receivers.Uses the zero forcing method,designs the precoding vector of the sender,and uses the linear precoding algo rithm to eliminate the interference between the network and the network.Finally,compares the expected signal with the ideal signal,and presents the result of the reuse of the model by MATLAB simulation.It is found that the model is very close to the ideal value,and the an tenna efficiency of each model is obtained,and the proposed method is accurate and reliable.

关 键 词：空间复用增益 迫零算法 信道并存 多播 单播 

分 类 号：TN9[电子电信—信息与通信工程]