基于修正扩展信道矩阵的球形解码算法  

Sphere Decoding Algorithm Based on Modified Extended Channel Matrix

作　　者：卢美玲 唐加山[2] 杨慧霞 章歆羡 卓干兵 Lu Meiling;Tang Jiashan;Yang Huixia;Zhang Xinxian;Zhuo Ganbing(Nanjing University of Posts and Telecommunications,College of Telecommunication;Information Enginnering,Nanjing,210003,China)

机构地区：[1]南京邮电大学通信与信息工程学院 [2]南京邮电大学理学院,江苏南京210003

出　　处：《信息通信》2019年第8期5-9,共5页Information & Communications

摘　　要：球形解码算法是多输入多输出(MIMO)系统一种性能较好的信号检测算法,只是其计算复杂度较高,为此,有学者提出运用最小均方误差(MMSE)和压缩系数控制的初始半径来降低复杂度,然而对于16QAM调制的情形,该算法虽能降低复杂度却也损失了部分误码率。针对这一问题,文章提出一种基于修正扩展信道矩阵的球形解码算法,仿真结果表明,改进的算法在16QAM调制时不仅可以改善信号的误码率,而且基本不增加算法的计算复杂度。The sphere decoding algorithm is a good performance signal detection algorithm for multiple input multiple output(MIMO)systems,but its computational complexity is high.For this reason,some scholars have proposed the use of minimum mean square error(MMSE)and compression coefficient controlled radius to reduce the complexity,but for the case of 16QAM modulation,the algorithmcan reduce the complexity but also lose some of the bit error rate.Aiming at this problem,this paper proposes a sphere decoding algorithmbased on modified extended channel matrix.The simulation results show that the improved algorithm can not only improve the bit error rate of the signal in 16QAM modulation,but also does not increase the computational complexity of the algorithm.

关 键 词：球形译码 压缩系数 扩展信道矩阵 低复杂度 

分 类 号：TN919.3[电子电信—通信与信息系统]