| 一种改进的变步长LMS自适应滤波算法及其在噪声抵消中的应用 |
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| 引用本文： | 余荣贵,叶水生. 一种改进的变步长LMS自适应滤波算法及其在噪声抵消中的应用[J]. 计算机工程与科学, 2009, 31(4) |
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| 作者姓名： | 余荣贵 叶水生 |
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| 作者单位： | 南昌航空大学计算机学院,江西,南昌,330063 |
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| 基金项目： | 江西省教育厅资助项目，江西省自然科学基金 |
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| 摘 要： | 本文提出了一种改进的变步长LMS自适应滤波算法,并将其应用于自适应噪声抵消中。该算法解决了算法收敛时间和稳态误差间的矛盾,为实际应用提供了更大的灵活性。它采用误差信号的相关值去调节步长,使得算法的均方误差小、收敛速度快,并且降低了LMS算法对噪声的敏感性。
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| 关 键 词： | 自适应滤波器 噪声抵消 收敛速度 误差信号 |
A Modified Variable Step Size LMS Adaptive Filtering Algorithm and Its Application in Noise Cancellation |
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| YU Rong-gui,YE Shui-sheng. A Modified Variable Step Size LMS Adaptive Filtering Algorithm and Its Application in Noise Cancellation[J]. Computer Engineering & Science, 2009, 31(4) |
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| Authors: | YU Rong-gui YE Shui-sheng |
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| Affiliation: | School of Computer Science;Nanchang Hangkong University;Nanchang 330063;China |
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| Abstract: | This paper presents a modified variable step size LMS(Least Mean Square)adaptive filtering algorithm which is suitable for adaptive noise cancellation.The algorithm allows more flexibility of misadjustment and convergence time without the compromise one for the other.It uses the correlation of the output error signal to adjust the step size and to obtain the low mean square error and fast convergence.Meanwhile,it decreases the sensitivity of noise on the LSM algorithm. |
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| Keywords: | self-adaptive filter noise cancellation convergence rate error signal |
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