NDLI: An novel variable step size LMS adaptive filtering algorithm based on hyperbolic tangent function

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An novel variable step size LMS adaptive filtering algorithm based on hyperbolic tangent function

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An novel variable step size LMS adaptive filtering algorithm based on hyperbolic tangent function

Content Provider	IEEE Xplore Digital Library
Author	Yonggang Yan Junwei Zhao Zhankui Wang Yongpeng Yan
Copyright Year	2010
Description	Author affiliation: College of Electronics and Information, Northwestern Polytechnical University, Xi'an City, Shanxi Province, China (Yongpeng Yan) \|\| Precision Engineering Institute, Henan Polytechnic University, Jiaozuo City, Hen'an Province, China (Yonggang Yan; Junwei Zhao) \|\| Department of Mechanical and Electric Engineering, Henan Institute of Science and Technology, Xinxiang City, He'nan Province, China (Zhankui Wang)
Abstract	Adaptive filtering has been widely used in many fields. However, the disadvantage of the fixed step-size LMS is that the step factor can not meet the convergence rate and the static error at the same time. This paper describes the research work to an improved variable step size Least Mean Square (LMS) adaptive filtering algorithm based on hyperbolic tangent function. The basic principles of some existing variable step LMS adaptive filter algorithms were analyzed firstly. Based on the hyperbolic tangent function, a novel variable step size LMS algorithm is proposed to increase the convergence rate and eliminate the disturbances of existing independent noise. The step size increases or decreases as the mean-square error increases or decreases, allowing the adaptive filter to track changes in the system as well as produce a small steady state error. The convergence and steady state behavior of the algorithm were analyzed. What's more, this algorithm eliminates the influence of independent noise by using the autocorrelation of the current error signal e(n) and the previous error signal e(n-1). The simulations were carried on to testify the effectiveness, and the MSE learning curves were got precisely The results of computer simulation confirm this improved algorithm has smaller computation, faster convergence rate, and lower static error to compare with the other variable step algorithms.
File Size	727990
File Format	PDF
ISBN	9781424472352
e-ISBN	9781424472376
DOI	10.1109/ICCASM.2010.5622332
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-22
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Variable step size Noise Least mean squares algorithm Adaptive filtering Hyperbolic tangent function
Content Type	Text
Resource Type	Article

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