Linear Phase Low-Pass IIR Digital Differentiators

A novel approach to designing approximately linear phase infinite-impulse-response (IIR) digital filters in the passband region is introduced. The proposed approach yields digital IIR filters whose numerators represent linear phase finite-impulse-response (FIR) filters. As an example, low-pass IIR d...

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Bibliographic Details
Published in:IEEE transactions on signal processing 2007-02, Vol.55 (2), p.697-706
Main Author: Al-Alaoui, M.A.
Format: Article
Language:English
Subjects:
Al-Alaoui operator
analog filters
Applied sciences
bilinear transformation
Cutoff frequency
Data mining
Detection, estimation, filtering, equalization, prediction
Differentiators
Digital
digital differentiators
Digital filters
Exact sciences and technology
Filtering
Finite impulse response filter
finite-impulse-response (FIR) filters
IIR filters
infinite-impulse-response (IIR) filters
Information, signal and communications theory
Linear approximation
Linear phase
Low pass filters
low-pass digital differentiators
Nonlinear filters
Passband
Signal and communications theory
Signal processing
Signal, noise
Telecommunications and information theory
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Summary:A novel approach to designing approximately linear phase infinite-impulse-response (IIR) digital filters in the passband region is introduced. The proposed approach yields digital IIR filters whose numerators represent linear phase finite-impulse-response (FIR) filters. As an example, low-pass IIR differentiators are introduced. The range and high-frequency suppression of the proposed low-pass differentiators are comparable to those obtained by higher order FIR low-pass differentiators. In addition, the differentiators exhibit almost linear phases in the passband regions
ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2006.885741