| 有色环境下的LMS算法研究 |
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| 引用本文： | 黎明,刘文华.有色环境下的LMS算法研究[J].湖北师范学院学报(自然科学版),2008,28(3). |
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| 作者姓名： | 黎明 刘文华 |
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| 作者单位： | 湖北师范学院教育信息与技术学院,湖北,黄石,43500 |
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| 基金项目： | 湖北师范学院科研基金资助项目 |
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| 摘 要： | 研究有色噪声和非平稳信号(如回声取消)情况下自适应滤波,提出解相关自适应最小均方(LMS)算法。首先设计出自适应预滤波器同时对输入信号和误差信号解相关,使输入信号和误差信号的白化,然后证明该方法并不改变维纳最优解,最后提出改进的变步长解相关自适应LMS算法。仿真实验表明:无论在有色噪声环境下还是白噪声环境下,该算法都改善了LMS算法性能,即提高了收敛速度又减小稳态误差。
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| 关 键 词： | 有色信号 解相关 自适应滤波器 LMS算法 |
The research of LMS algorithms for colored environments |
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| LI Ming,LIU Wen-hua.The research of LMS algorithms for colored environments[J].Journal of Hubei Normal University(Natural Science),2008,28(3). |
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| Authors: | LI Ming LIU Wen-hua |
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| Institution: | LI Ming; LIU Wen-hua(College of Educational Information and Technology; Hubei Normal University; Huangshi 435002; China); |
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| Abstract: | This paper proposed decorrelating adaptive least mean-square(LMS) algorithms for colored situation and nonstationary signals such as in acoustic echo cancellation.First the adaptive pre-filer operates on input and error signals for decorrelation which whiten input and error signals,also it is proven that the optimal solution will remain unchanged.Finally we presented altering-step decorrelation LMS algorithms.Simulations results confirm that the performance of the adaptive LMS algorithms improved the conver... |
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| Keywords: | colored signal decorrelation adaptive filter LMS algorithms |
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