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Journal ArticleDOI

Digital notch filter design procedure

J. Cadzow
- 01 Feb 1974 - 
- Vol. 22, Iss: 1, pp 10-15
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TLDR
In this paper, an analytical procedure for designing a linear digital notch filter is presented, which is implemented by cascading three second-order filters so as to avoid instability which may arise from computer coefficient truncation.
Abstract: 
An analytical procedure for designing a linear digital notch filter is presented. The resultant filter is sixth-order and is implemented by cascading three second-order filters so as to avoid instability which may arise from computer coefficient truncation. The procedure outlined is straightforward, requires only simple algebraic steps, and gives filter parameter selection criteria for reducing the effects of computer coefficient truncation. Notch filters have utility in situations where a desired signal is corrupted by an additive sinusoidal pickup. One thus must process the noisy signal so as to remove the sinusoid without significantly distorting the desired signal.

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Citations
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Journal ArticleDOI

Mechanical vibration reduction control of two-mass permanent magnet synchronous motor using adaptive notch filter with fast Fourier transform analysis

Dong-Hee Lee, +2 more
- 26 Jul 2012 - 
TL;DR: In this article, an adaptive notch filter with automatic searching of the resonant frequency and bandwidth from the speed error without any mechanical signal feedback to reject the mechanical vibration of the linear feeder system is presented.
Journal ArticleDOI

Resonance Suppression for Hydraulic Servo Shaking Table Based on Adaptive Notch Filter

Jianjun Yao, +5 more
- 21 May 2019 - 
TL;DR: In this article, an adaptive notch filter based on least mean square (LMS) error principle is employed to identify the resonance frequencies online and real-time adjust the parameters of the notch filter.
Journal ArticleDOI

General IIR optical notch filter based on Michelson Gires-Tournois interferometer

Juan Zhang, +2 more
- 01 Mar 2012 - 
TL;DR: In this article, a general IIR optical notch filter design is presented from a digital filter design perspective for Michelson Gires-Tournois Interferometer structure, and the results show that the notch filter has the tunability of notch frequency and 3dB rejection bandwidth.
Patent

Low frequency digital notch filter

Nigel P. Dyer
TL;DR: A low frequency digital notch filter (fig.l) comprising two sub-filters - an all-pass-network filter (l) and a T-section filter (3) with a feedback connection from the T-filter to an input node (3l), and feed forward connection from this input node to a terminal output node (33) is presented in this paper.
Journal ArticleDOI

A frequency-domain LMS comb filter

M.G. Amin
- 01 Dec 1991 - 
TL;DR: In this article, a new application of the least mean square algorithm (LMS) to signal analysis and enhancement is presented, where the LMS is implemented in the frequency domain to simulate a fixed-notch filter that nulls sinusoids with harmonically related frequencies.
References
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Journal ArticleDOI

Digital filtering with applications to electrocardiogram processing

C. Weaver, +6 more
- 01 Sep 1968 - 
TL;DR: The design of low-pass, bandpass, high- pass, and notched filter difference equations using Z-transform techniques and applications of these filters to the processing of electrocardiograms.
Journal ArticleDOI

Design of MTI detection filters with nonuniform interpulse periods

R. Roy, +1 more
- 01 Nov 1970 - 
TL;DR: In this article, the authors presented an analysis of the transfer function of digital MTI detection filters of the type (1-z^{-1})^{n} followed by a squarer and a detector where the designer has the freedom to vary the interpulse periods.