The Filtered-x LMS Algorithm
نویسنده
چکیده
منابع مشابه
Multichannel active noise control algorithms using inverse filters
1.0 Introduction For active noise control (ANC) systems, a common approach is to use adaptive FIR filters trained with the filtered-x LMS algorithm [1], for both feedforward systems and Internal Model Control (IMC) feedback systems, in monochannel or multichannel systems. Variations of the algorithm sometimes called the modified filtered-x LMS algorithm have been published [2], which can achiev...
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The Filtered-x LMS algorithm has been an essential component of many industrial active control systems. This algorithm can be used in mono-channel, as well as multi-channel systems. One of the drawbacks of the multi-channel Filtered-x LMS algorithm is that its convergence speed depends on the autocorrelation and intercorrelation of the different filtered reference signals and can be very slow. ...
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The objective of this letter is to analyze the effects of frequency mismatch for an adaptive algorithm that becomes the Filtered-X LMS algorithm when the reference signals are purely sinusoidal. The Filtered-X LMS algorithm is often used for active control of acoustic noise. For the case of sinusoidal noise sources, if there is a deviation between the frequency used in the adaptive algorithm an...
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FILTERED-X LMS AND MULTIPLE ERROR LMS ALGORITHMS Eric A. Wan Oregon Graduate Institute of Science & Technology Department of Electrical Engineering and Applied Physics P.O. Box 91000, Portland, OR 97291
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This paper presents a stochastic analysis of the Filtered-X LMS algorithm. The mean weight vector recursion is derived for slow adaptation and for a white reference signal without use of independence theory. The Wiener solution is determined explicitly as a function of the input statistics and the impulse responses of the primary and secondary signal paths. It is shown that the steady-state mea...
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Active noise and vibration control (ANC) has become an important application area for adaptive filters. The most popular adaptive algorithm used for ANC is the Filtered-X LMS (FXLMS) algorithm [1,2]. This algorithm is a modification of the well known LMS algorithm. The reference signal is filtered so as to compensate for filters inherent in the electro-acoustic adaptation loop. These additional...
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