认知MIMO系统基于正交投影的SLNR收发联合设计算法  

Orthogonal Projection Based SLNR Joint Transceiver Design Algorithm for Cognitive MIMO System

作　　者：唐帅[1] 朱世磊[1] 胡捍英[1] 仵国锋[1] 

机构地区：[1]解放军信息工程大学导航与空天目标工程学院,郑州450003

出　　处：《信号处理》2014年第3期268-275,共8页Journal of Signal Processing

基　　金：国家科技重大专项(2011ZX03003-003-02)

摘　　要：为实现认知MIMO系统中认知网络与主用户网络的高效频谱共享,提出一种基于正交投影的SLNR收发联合设计算法。该算法首先通过正交投影预处理将信号投射到干扰信道的零空间从而消除对主用户的干扰,然后针对认知网络,以改进的信漏噪比为优化指标,利用交替迭代的思想联合设计收发处理矩阵,提高认知网络的性能。仿真结果表明,算法能有效抑制用户间的共信道干扰,在保证主用户正常通信的同时,有效提高了认知网络的误码率及和容量性能。An orthogonal projection based SLNR joint transceiver design algorithm is proposed for cognitive MIMO system to realize effective spectrum sharing between cognitive user network and primary user network.The proposed algorithm can be implemented by two steps.Firstly,in order to eliminate the interference to primary user,a pre-processing that orthogonally project the transmitting signal to the null space of interfering channel was used at cognitive base station.Then,aimed at improving performance of the cognitive user network,an alternate iteration method was exploited to jointly design transceiver utilizing the modified SLNR as optimizational target.Simulation results demonstrate that proposed algorithm can efficiently suppress the co-channel interference and improve BER and sum-rate capacity performance of cognitive user network without disturbing the normal communication of primary user network.

关 键 词：认知MIMO 正交投影 信漏噪比 交替迭代 收发联合设计 

分 类 号：TN92[电子电信—通信与信息系统]