A simple ladder realization of maximally flat allpass fractional delay filters

Shunsuke Koshita, Masahide Abe, Masayuki Kawamata

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

This brief proposes a new ladder structure for the Thiran fractional delay filter (i.e., maximally flat allpass fractional delay filter given by the Thiran approximation). The proposed ladder structure is based on a continued fraction representation. Although there exists a similar approach that was proposed by Tassart and Depalle, their structure is not realizable because of delay-free loops. On the other hand, we show that the proposed method avoids generating delay-free loops and thus successfully yields a realizable ladder structure for the Thiran fractional delay filter in a very simple form.

Original languageEnglish
Article number6718008
Pages (from-to)203-207
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume61
Issue number3
DOIs
Publication statusPublished - 2014 Mar

Keywords

  • Continued fraction
  • Delay-free loop
  • Ladder structure
  • Thiran fractional delay filter

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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