Linear phase design of lattice wave digital filters

Christian Zeintl, Hans Georg Brachtendorf

Research output: Chapter in Book/Report/Conference proceedingsConference contributionpeer-review

1 Citation (Scopus)

Abstract

This paper presents a novel design method and its implementation for Lattice Wave Digital Filters (LWDF) with very low group delay variations. These filters are a particular kind of Infinite Impulse Response (IIR) filters which exhibit excellent hardware implementation characteristics, since they are based on allpass filters with prescribed phase function. Allpass filters are particularly suited for hardware implementation, since the required multiplications are very low. The novel design method described in this paper aims at minimizing the inherent group delay variations of IIR filters using modern approximation techniques from applied linear algebra. The integration into a dedicated LWDF design toolbox allows a broader audience to make use of this design method. The results show the effectiveness of this design method compared to a reference Butterworth implementation. Through the integration into the filter design toolbox it is possible to analyze quantization effects as well as to directly retrieve the filter coefficients needed for hardware implementation.

Original languageEnglish
Title of host publication2018 28th International Conference Radioelektronika, RADIOELEKTRONIKA 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-5
Number of pages5
ISBN (Electronic)9781538624852
DOIs
Publication statusPublished - 8 Jun 2018
Event28th International Conference Radioelektronika, RADIOELEKTRONIKA 2018 - Prague, Czech Republic
Duration: 19 Apr 201820 Apr 2018

Publication series

Name2018 28th International Conference Radioelektronika, RADIOELEKTRONIKA 2018

Conference

Conference28th International Conference Radioelektronika, RADIOELEKTRONIKA 2018
CountryCzech Republic
CityPrague
Period19.04.201820.04.2018

Keywords

  • Allpass filters
  • Collocation method
  • Design method
  • Galerkin method
  • Hilbert transform
  • Lattice Wave Digital Filter
  • Linear phase filters
  • Low multiplier count
  • Low power consumption
  • LWDF
  • Ultra-low group delay

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