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Metrology and Measurement Systems

The Journal of Committee on Metrology and Scientific Instrumentation of Polish Academy of Sciences

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Volume 20, Issue 3 (Sep 2013)

An Efficient Method of Group Delay Equalization for Digital IIR Filters

Piotr Okoniewski
  • Corresponding author
  • West Pomeranian University of Technology, Faculty of Electrical Engineering, ul. Sikorskiego 37, 70-313 Szczecin, Poland
  • Email:
/ Jacek Piskorowski
  • West Pomeranian University of Technology, Faculty of Electrical Engineering, ul. Sikorskiego 37, 70-313 Szczecin, Poland
Published Online: 2013-09-06 | DOI: https://doi.org/10.2478/mms-2013-0034

Abstract

The paper presents the equalization problem of non-linear phase response of digital IIR type filters. An improved analytical method of designing a low-order equalizer is presented. The proposed approach is compared with the original method. The genetic algorithm is presented as an iterative method of optimization. The vector and matrix representation of the all-pass equalizer are shown and introduced to the algorithm. The results are compared with the analytical method. In this paper we have also proposed the use of an aging factor and setting the initial population of the genetic algorithm around the solution provided by the analytical methodology

Keywords: IIR filter; digital filter; group delay; phase response; genetic algorithm; equalizer

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About the article

Published Online: 2013-09-06

Published in Print: 2013-09-01



Citation Information: Metrology and Measurement Systems, ISSN (Print) 0860-8229, DOI: https://doi.org/10.2478/mms-2013-0034. Export Citation

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