基于双曲正切函数的智能天线变步长LMS算法

基于双曲正切函数的智能天线变步长LMS算法

钟慧湘, 郑莎莎, 冯月萍

吉林大学计算机科学与技术学院, 长春 130012

收稿日期:2008-03-25 修回日期:1900-01-01 出版日期:2008-09-26 发布日期:2008-09-26
通讯作者: 钟慧湘

A Variable Step Size LMS Algorithm in Smart AntennasBased on Hyperbolic Tangent Function

ZHONG Huixiang, ZHENG Shasha, FENG Yueping

College of Computer Science and Technology, Jilin University, Changchun 130012, China

Received:2008-03-25 Revised:1900-01-01 Online:2008-09-26 Published:2008-09-26
Contact: ZHONG Huixiang

摘要/Abstract

摘要： 提出一种基于双曲正切函数的智能天线变步长最小均方（LMS）算法. 通过建立步长因子与误差信号的双曲正切函数关系改进LMS算法, 解决了固定步长时收敛速度和稳态误差间的矛盾. 仿真结果表明, 所提出的变步长最小均方算法比标准的最小均方算法有更快的收敛速度和更小的稳态误差.

关键词: 智能天线, 最小均方算法, 变步长, 双曲正切函数

Abstract: A variable step size least mean square algorithm in smart antennas is presented in this paper. The algorithm is established by introducing a hyperbolic tangent function relation between step size and signal error. The contradiction between the convergence speed and maladjustment error is thus solved. The simulationresults show that the proposed algorithm has faster convergence and smaller maladjustment than standard least mean square algorithm.

Key words: smart antenna, least mean square algorithm, variable step size, hyperbolic tangent function

中图分类号:

TP391.9

钟慧湘, 郑莎莎, 冯月萍. 基于双曲正切函数的智能天线变步长LMS算法[J]. J4, 2008, 46(05): 935-939.

ZHONG Huixiang, ZHENG Shasha, FENG Yueping. A Variable Step Size LMS Algorithm in Smart AntennasBased on Hyperbolic Tangent Function[J]. J4, 2008, 46(05): 935-939.