Mixed-domain reduced order IIR approximation for FIR filter

Chee Ho Fung, Chi Wah Kok

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

1 Scopus citations


This paper proposed a mixed time and frequency domain approximation algorithm that approximates a high order FIR filter using an IIR filter with lower order. The high order FIR filter is first shortened by an eigenfilter based time domain equalizer. The equalization residue is approximated in the spectral domain using, for example, the minimax criteria, such that the two approximation filters will join together to form the resulting IIR filter. The mixed time and frequency design criteria is based on the observation that both time and frequency domain property are important and inherently inefficient when used alone. Design examples have shown that the proposed design method can obtain very good approximation in both the impulse response and spectral response of the given filter which cannot be obtained by other design techniques.

Original languageEnglish
Title of host publication2004 12th European Signal Processing Conference, EUSIPCO 2004
PublisherEuropean Signal Processing Conference, EUSIPCO
Number of pages4
ISBN (Electronic)9783200001657
StatePublished - Sep 2015
Event12th European Signal Processing Conference, EUSIPCO 2004 - Vienna, Austria
Duration: 6 Sep 200410 Sep 2004

Publication series

NameEuropean Signal Processing Conference
ISSN (Print)2219-5491


Conference12th European Signal Processing Conference, EUSIPCO 2004


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