| 一种变步长自适应滤波算法在信号消噪中的应用 |
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| 引用本文： | 张安莉,陈丹.一种变步长自适应滤波算法在信号消噪中的应用[J].西安工业大学学报,2010,30(1):71-74. |
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| 作者姓名： | 张安莉 陈丹 |
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| 作者单位： | [1]西安交通大学城市学院,西安710021 [2]西安理工大学自动化与信息工程学院,西安710048 |
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| 摘 要： | 为了解决自适应LMS算法中收敛速度和稳态失调之间的矛盾,在选择自适应算法的步长时,通过在基于箕舌线的变步长LMS算法中引入自相关估计,对信噪比为SNR=16 dB的染噪信号进行处理.仿真结果表明:该算法使均方误差曲线在500个采样点附近达到稳态,均方误差MSE=2.595.时域波形显示,利用变步长自适应滤波算法能有效地滤除信号中的噪声,获得稳定的消噪效果.
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| 关 键 词： | 变步长 自适应滤波 收敛速度 自相关估计 噪声 |
A Variable Step-size Adaptive Filter Used in Noise Reduction |
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| Authors: | ZHANG An-li CHEN Dan |
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| Affiliation: | 1. Xi＇an Jiaotong University City College,Xi＇an 710021 ,Chinal 2. School of Automation＆ Information, Xi＇ an University of Technology, Xi＇ an 710048, China) |
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| Abstract: | It is a significant problem to select step-size of adaptive filtering algorithm to solve the confliction between convergence speed and steady state error. This paper presents a variable step-size LMS algorithm with autocorrelation estimation used in noise reduction. By the simulation on Matlab, the results show that MSE curve in the vicinity of 500 sampling points to achieves stable state with MSE = 2. 595. The proposed algorithm is effective to improve convergence speed and stable error, and gets the good effects of signal noise reduction. |
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| Keywords: | variable step-size adaptive filter convergence speed autoeorrelation estimate noise |
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