V-BLAST系统中选择性最大比合并算法  

Selection/Maximal-Ratio Combining Receiver in V-BLAST Systems

作　　者：张永宏[1] 

机构地区：[1]中国电波传播研究所第2研究部,山东青岛266107

出　　处：《电子科技》2011年第4期1-3,7,共4页Electronic Science and Technology

基　　金：国防预研基金资助项目(D0802030);(D0902001)

摘　　要：通过选择性最大比合并(SC/MRC)算法,在并行干扰抵消(PIC)技术的基础上,对V-BLAST系统各接收天线的干扰抵消结果按照SC/MRC合并,实现了分集接收。该算法最多可以实现与接收天线数等同的分集增益,而通过选择信道条件较好的几个接收天线进行合并,可以在性能与复杂度之间取得折衷。MRC合并只需与选择合并的天线数线性地计算复杂度,远小于PIC算法中的信道伪逆运算。在4×4与8×8的M IMO系统中对新算法进行了仿真实验,实验结果验证了所提算法的性能。The selection combining/maximal ratio combining（SC/MRC） algorithm is introduced into V-BLAST system based on parallel interference cancellation（PIC）,where the cancellation residuals signal at each receiving antenna are combined by SC/MRC,so that diversity reception is achieved.The diversity gain of as much as the number of receiving antennas is obtained by the scheme,and the ratio of performance to complexity can be arrived at by selecting the receiving antennas with better channel transfer characteristics and combining them together.The complexity of MRC is linear with the number of antennas selected to combine,which is much less than the pseudo-inverse in conventional PICs.Simulations are carried out in 4×4 and 8×8 MIMO channels,and the performance of the new algorithm is verified by the simulation results.

关 键 词：MIMO 选择性合并 最大比合并 并行干扰抵消 

分 类 号：TN928[电子电信—通信与信息系统]