Realization of variable low-pass state-space digital filters using step responses

Shunsuke Koshita, Masahide Abe, Masayuki Kawamata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

This paper presents a new realization method of variable low-pass infinite impulse response (IIR) digital filters with high tuning accuracy. We construct the proposed variable filters by using the state-space-based frequency transformation proposed by Mullis and Roberts. Since this transformation requires an inverse matrix that leads to high computational cost, we present a new simple algorithm that obtains this inverse matrix by using the step responses of a simple state-space system. This approach imposes no restrictions on the tuning parameter, and thus the cutoff frequencies of the proposed variable filters can be tuned arbitrarily. Furthermore, we show that the proposed variable filters exhibit high tuning accuracy with respect to quantization effects over the entire tuning range.

Original languageEnglish
Title of host publicationISCIT 2010 - 2010 10th International Symposium on Communications and Information Technologies
Pages566-570
Number of pages5
DOIs
Publication statusPublished - 2010 Dec 1
Event2010 10th International Symposium on Communications and Information Technologies, ISCIT 2010 - Tokyo, Japan
Duration: 2010 Oct 262010 Oct 29

Publication series

NameISCIT 2010 - 2010 10th International Symposium on Communications and Information Technologies

Other

Other2010 10th International Symposium on Communications and Information Technologies, ISCIT 2010
CountryJapan
CityTokyo
Period10/10/2610/10/29

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Information Systems

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