利用QR分解法提高多用户MIMO中继容量  

Capacity Increasing of Multi-user MIMO Relay Network by Using QR Decomposition

作　　者：刘志兵[1] 林基明[1] 曹慧[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《电视技术》2010年第8期96-99,共4页Video Engineering

基　　金：广西自然科学基金项目(桂科自09910182;桂科基07310267)

摘　　要：把QR分解法与SVD分解法相结合,通过设计一个零位滤波器将多用户MIMO中继信道等效成多个相互独立的并联子信道,使得期望用户数据得到发送的同时,其他用户信息也得到限制,进一步减小干扰。相比于目前使用的迫零法(ZF)和放大前传(AF)系统,新算法在中继端运用QR分解法对前向和后向信道进行分析,在获得最大的空间复用增益的同时还得到分布式阵列增益和接收阵列增益。理论分析和仿真结果表明,此方案能使整个系统的中继容量获得较大的提升。By combining the QR and SVD decomposition methods,a zero filter is designed,by which the multi-user MIMO relay channel is equivalent to several mutually independent parallel sub-channels.And thus,the data of desired user is sent,and the other information of user is restricted,the interference is further reduced as well.By comparing the Zero Forcing（ZF） and Amplify Forward（AF） system used at present,the new algorithm uses QR decomposition in relay nodes to analyze the backward and forward channels to simultaneously achieve the distributed array gain and receives array gain while maintaining maximum multiplexing gain.The theory analysis and simulating results show that this scheme achieves higher capacity than other existing relay schemes.

关 键 词：MIMO 中继信道容量 QR分解 SVD分解 

分 类 号：TN925[电子电信—通信与信息系统] TP309.41[电子电信—信息与通信工程]