Cascading tricks for designing composite filters with sharp transition bands

David Shiung, Ya Yin Yang, Chu Sing Yang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This article presents novel tricks regarding cascading two digital filters to produce composite filters with very sharp transition bands for high-performance applications. The key point of the proposed tricks is to shape the magnitude frequency response of a prototype infinite impulse response (IIR) filter by a two-tap finite impulse response (FIR) filter using its nulls. In particular, we choose either a comb filter or a complementary comb filter of coefficients +1/-1, also called a shaping filter, to sharpen the transition bands of a prototype filter. The magnitude frequency response of the shaping filter compensates the Gibbs phenomenon commonly appearing in the passband edge and produces sharp transition bands for the cascaded filter. As compared to an equivalent IIR filter, the price paid is an additional comb/complementary comb filter of low complexity.

Original languageEnglish
Article number7368237
JournalIEEE Signal Processing Magazine
Volume33
Issue number1
DOIs
Publication statusPublished - 2016 Jan 1

Fingerprint

Comb filters
IIR filters
Composite
Filter
Frequency response
Composite materials
FIR filters
Digital filters
Impulse Response
Frequency Response
Prototype
Gibbs Phenomenon
Digital Filter
Low Complexity

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

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Cascading tricks for designing composite filters with sharp transition bands. / Shiung, David; Yang, Ya Yin; Yang, Chu Sing.

In: IEEE Signal Processing Magazine, Vol. 33, No. 1, 7368237, 01.01.2016.

Research output: Contribution to journalArticle

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