| 一种新的变步长LMS算法 |
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| 引用本文： | 魏晓妮.一种新的变步长LMS算法[J].科学技术与工程,2011,11(4):749-751,755. |
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| 作者姓名： | 魏晓妮 |
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| 作者单位： | 西北工业大学电子信息学院,西安,710129 |
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| 摘 要： | 为了提高LMS自适应算法的性能,在对传统LMS算法、变步长LMS算法及其改进算法分析的基础上,提出了一种新的步长与误差信号之间的函数关系。既能保证均方误差收敛、有较小的失凋,又能在算法达到稳态时,在低信噪比环境下有很好的跟踪性能,并且不易受噪声影响。理论分析和计算机仿真结果均表明该算法优于传统算法。
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| 关 键 词： | 最小均分(Lease Mean Square)LMS算法 变步长 跟踪能力 |
| 收稿时间： | 2010/11/11 0:00:00 |
| 修稿时间： | 2010/11/19 0:00:00 |
Research on a New LMS Algorithm with Variable Steplength |
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| Wei Xiaoni.Research on a New LMS Algorithm with Variable Steplength[J].Science Technology and Engineering,2011,11(4):749-751,755. |
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| Authors: | Wei Xiaoni |
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| Institution: | WEI Xiao-ni,ZHANG Hui-sheng(College of Information Engineering,Northwestern Polytechnical University,Xi'an 710129,P.R.China) |
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| Abstract: | A type of algorithms of variable step-size LMS adaptive filtering is discussed and presented another new non-linear functional relationship between the step-size and the error signalk,which improves the algorithm perform ance.The new algorithm has better MSE convergence properties and smaller stable-state maladjustment.It also keeps excellent tracking ability at low noise.Finally,simulation results show the algorithm is wuperior to the former algorithms in performance. |
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| Keywords: | LMS algorithm variable step-size tracking ability |
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