一种基于变换域LMS的多用户检测算法  

A Blind Multi-user Detection Algorithm Based on Transform Domain LMS

作　　者：李群[1] 郑翔[2] 周志杰[2] 

机构地区：[1]钟山职业技术学院 [2]解放军理工大学通信工程学院,江苏南京210007

出　　处：《无线电通信技术》2007年第5期14-16,31,共4页Radio Communications Technology

摘　　要：LMS算法收敛速度由输入自相关矩阵特征值的发散程度决定,很多场合下收敛速度慢不能满足需求。变换域自正交LMS算法在变换域对输入信号做正交处理,使得输入自相关矩阵变成单位矩阵,能够有效地提高收敛速度。研究了基于变换域LMS的多用户检测算法,仿真表明该算法能够提高多用户检测器的性能。The convergence speed of LMS algorithm is determined by the spread of the eigenvalue of the input signal＇s auto-correlation matrix,which is too slow to meet the need in many conditions.Transform domain LMS algorithm turns the auto-correlation matrix into unit matrix in transform domain,so it can speed up the convergence effectively.In this paper,transform domain LMS algorithm was applied in multi-user detection.The simulation results showed that the algorithm could improve the performance of multi-user detector.

关 键 词：变换域LMS算法 多用户检测 正交变换 自正交化 

分 类 号：TN929.5[电子电信—通信与信息系统]