摘要
现有的单载波频域均衡技术中的定步长频域批处理LMS(Frequency-DomainBlockLeastMeanSquare,FBLMS)算法,在收敛速度和稳态误差之间存在矛盾。针对这个问题,基于对变步长LMS算法的研究分析,提出了一种新的改进的变步长频域批处理LMS自适应滤波算法,通过变步长因子以及频域权系数抽头泄漏能很好地协调收敛速度和稳态误差之间的矛盾,并且还具有较低的算法复杂度的特点。通过Matlab对提出的新算法进行计算机仿真验证,结果表明该算法有较好的收敛速度和较小的稳态误差。
The fixed step-size FBLMS (Frequency-Domain Block Least Mean Square,FBLMS) which is used in the existing single-carrier system with frequency domain equalization leads to a conflict of convergence speed and steady stage error.Based on the research of variable step-size LMS algorithms,a new improved frequency-domain LMS adaptive filtering algorithm is proposed,which balances the convergence speed and steady stage error by variable step-size and frequency domain weight coefficients leak,and reduces the computation complexity.Through emulations on Matlab platform,it validates that the improved algorithm has the dominance of high convergence speed and small steady stage error.
出处
《计算机工程与应用》
CSCD
北大核心
2009年第1期17-21,共5页
Computer Engineering and Applications
基金
国家高技术研究发展计划(863)~~
关键词
频域
最小均方(LMS)算法
自适应滤波
变步长
泄漏
frequency-domain
Least Mean Square(LMS) algorithm
adaptive filtering
variable step-size
leak