摘要
本文在滑动准最小均方误差瞬变步长LMS(SPLMS)算法基础上提出了一种基于正交小波变换的瞬变步长LMS(WTSPLMS)的改进自适应滤波算法。该算法较好地利用了正交小波具有良好时频局部化的特性 ,使之除具有SPLMS算法的优点外 ,还具有更高的起始收敛速率 ;更小的权失调噪声 ,更大的抑噪能力。计算机仿真效果较好 。
Based on orthogonal wavelet transform,a modified adaptive algorithm(WTSPLMS)using smooth pseudo LMS(SPLMS)with transient step is presented in this paper At the same time,it has taken advantage of the character of orthogonal wavelet with locality in time frequency domains Besides having advantages of SPLMS,it has faster beginning convergence rate,lower misadjustment of weight,and better robustness aganist noise and disturbance The theoretical analysis is confirmed by the computer simulation results
出处
《通信学报》
EI
CSCD
北大核心
2001年第4期123-128,共6页
Journal on Communications
基金
国家自然科学基金资助项目!( 69872 0 30 )
陕西省自然科学基金资助项目!( 98X0 8)
关键词
正交小波变换
瞬变步长
自适应滤波算法
计算机仿真
orthogonal wavelet transform
transient step
misadjustment noise
convergence rate
