基于SQRD方法的STBC-VBLAST系统  

STBC-VBLAST System Based on SQRD

作　　者：张剑[1] 吕锋[1] 

机构地区：[1]武汉理工大学信息工程学院,湖北武汉430070

出　　处：《武汉理工大学学报（信息与管理工程版）》2006年第7期148-151,共4页Journal of Wuhan University of Technology：Information & Management Engineering

基　　金：教育部重点实验室开放基金资助项目(TKLJ0203)

摘　　要：VBLAST可以有效提高多发射天线系统容量,而STBC则具有较高的分集增益,通过将两种方案结合起来组成一个新的系统。根据已有的一种STBC-VBLAST模型,即通过在VBLAST的首层采用STBC编码,增加第一层信息符号的分集度,从而提高系统性能。由于传统的VBLAST解码性能差,并且译码算法相对复杂,于是对原有的解码算法进行了改进,提出了一种SQRD(Sorted QR Decomposition)的解码算法。该算法比原有算法复杂性小很多,性能却相差不大,仿真结果也证实了这一点。The VBLAST can be used to exploit the capacity potential provided by multiple transmit antenna systems.The STBC has higher diversity gain.Combining STBC with VBLAST,a system model is put forward.To raise the performance of the system,STBC at the 1^(st) layer of the VBLAST is adopted to increase the diversity gain of the 1^(st) layer information symbols.A modified SQRD is proposed as a new decoding algorithm,which is used at the receiver on the basis of an issued STBC-VBLAST system,because the decoding performance of the VBLAST traditional algorithm is worse and the computation is more complex. The simulation has verified that the performance is better and the complexity of the algorithm is lower.

关 键 词：STBC VBLAST 排序QR分解 

分 类 号：TN929.5[电子电信—通信与信息系统]