| 一种新的变步长LMS算法 |
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| 引用本文： | 张永华,马社祥,代红维. 一种新的变步长LMS算法[J]. 天津理工大学学报, 2010, 26(1): 62-64 |
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| 作者姓名： | 张永华 马社祥 代红维 |
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| 作者单位： | 天津理工大学,计算机与通信工程学院,天津,300384 |
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| 摘 要： | 对已有的一些变步长LMS自适应滤波算法进行了分析,在此基础上提出一种改进的变步长LMS算法.该算法建立了步长因子与误差信号和权系数变化之间的非线性函数关系,从而使权向量异步更新达到最佳.仿真结果表明,该算法具有更快的收敛速度,更小的稳态误差及更平稳的收敛过程.
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| 关 键 词： | LMS算法 变步长 收敛速度 稳态失调 |
Novel variable step size LMS algorithm |
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| ZHANG Yong-hua,MA She-xiang,DAI Hong-wei. Novel variable step size LMS algorithm[J]. Journal of Tianjin University of Technology, 2010, 26(1): 62-64 |
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| Authors: | ZHANG Yong-hua MA She-xiang DAI Hong-wei |
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| Affiliation: | ZHANG Yong-hua,MA She-xiang,DAI Hong-wei(School of Computer , Communication Engineering,Tianjin University of Technology,Tianjin 300384,China) |
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| Abstract: | Some variable step size LMS algorithms in literature are analyzed,based on which an improved one is presented.This algorithm builds a nonlinear relationship between the step size,the error signal and the weighting coefficients,and then the asynchronous update of the weight vector becomes optimal.Simulation results show that this algorithm has higher speed of convergence,lower steady state error and more stable convergence process. |
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| Keywords: | LMS algorithm variable step size convergence rate steady-state misadjustment |
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