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IEICE TRANSACTIONS on Fundamentals

Parallel Composition Based Adaptive Notch Filter: Performance and Analysis

Arata KAWAMURA, Yoshio ITOH, James OKELLO, Masaki KOBAYASHI, Yutaka FUKUI

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Summary :

In this paper we propose a parallel composition based adaptive notch filter for eliminating sinusoidal signals whose frequencies are unknown. The proposed filter which is implemented using second order all-pass filter and a band-pass filter can achieve high convergence speed by using the output of an additional band-pass filter to update the coefficients of the notch filter. The high convergence speed of the proposed notch filter is obtained by reducing an effect that an updating term of coefficient for adaptation of a notch filter significantly increases when the notch frequency approaches the sinusoidal frequency. In this paper, we analyze such effect obtained by the additional band-pass filter. We also present an analysis of a convergence performance of cascaded system of the proposed notch filter for eliminating multiple sinusoids. Simulation results have shown the effectiveness of the proposed adaptive notch filter.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E87-A No.7 pp.1747-1755
Publication Date
2004/07/01
Publicized
Online ISSN
DOI
Type of Manuscript
PAPER
Category
Digital Signal Processing

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