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Short Transient Parameter-Varying IIR Filter Based on Analog Oscillatory System

Faculty of Electrical Engineering, West Pomeranian University of Technology, 70-310 Szczecin, Poland
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Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Appl. Sci. 2019, 9(10), 2013; https://doi.org/10.3390/app9102013
Received: 3 April 2019 / Revised: 9 May 2019 / Accepted: 13 May 2019 / Published: 16 May 2019
(This article belongs to the Section Electrical, Electronics and Communications Engineering)
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Abstract

This paper presents a concept for digital infinite impulse response (IIR) lowpass filter with reduced transient response. The proposed digital filtering structure is based on an analog oscillatory system. In order to design the considered digital filter, the analog prototype is subjected to a discretization process and, then, the parameters describing the dynamical properties of the oscillatory system are temporarily varied in time, so as to suppress the transient response of the designed filter. An optimization method, aimed at reducing the settling time by proper parameter manipulation, is presented. Simulation results, along with a real-life application proving the usefulness of the proposed concept, are also shown and discussed. View Full-Text
Keywords: time-varying filters; digital signal processing; IIR filters; oscillatory system time-varying filters; digital signal processing; IIR filters; oscillatory system
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Okoniewski, P.; Piskorowski, J. Short Transient Parameter-Varying IIR Filter Based on Analog Oscillatory System. Appl. Sci. 2019, 9, 2013.

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