一种基于MIMO系统的改进广义球解码算法  

The Improved Generalized Sphere Decoder Algorithm Based on MIMO System

作　　者：杨梅[1] 陈阳[1] 李满华[1] 

机构地区：[1]安徽工程大学现代教育技术中心,安徽芜湖241000

出　　处：《长江大学学报（自科版）（上旬）》2016年第1期7-11,3,共5页JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG

基　　金：安徽省教育厅省级自然科学研究一般项目(TSKJ2014B03)

摘　　要：基于球解码算法和广义球解码算法的思想,提出了一种基于MIMO系统的改进的广义球解码算法:引入一个置换矩阵,利用矩阵的正交性来简化运算;根据信噪比的特性来选择初始半径;根据Cholesky法分解格莱姆矩阵来进行格点搜索;通过求解格的二次型的最小值来确定范围的上下界。仿真结果表明,该算法有较强的抗多流干扰能力,在高信噪比的情况下性能有所改善,而且复杂度也相对较低。Based on the ideas of sphere decoder algorithm and generalized sphere decoder algorithm,an improved generalized sphere decoder algorithm is studied based on multiple-input and multiple-output(MIMO)system.A permutation matrix is introduced and the orthogonal matrix is used to simplify the operation;then the initial radius is selected on the basis of characteristics of signal-to-noise ratio.According to the Cholesky method,the Gram matrix is decomposed for searching lattice;The upper and lower bounds of the range are determined by solving the minimum value of the two types of lattices.The simulation results show that the proposed detection algorithm has the stronger ability of anti-interference,its performance is improved with lower complexity in the case of high SNR.

关 键 词：广义球解码算法 MIMO系统 复杂度 

分 类 号：TN929.5[电子电信—通信与信息系统]