Design of real and complex linear-phase IIR modified QMF banks

Alfonso Fernandez-Vazquez, Gordana Jovanovic-Dolecek

Research output: Contribution to conferencePaper

Abstract

A design of linear-phase IIR (Infinite Impulse Response) modified QMF banks including both real and complex valued coefficients is proposed. This design is based on parallel structure of two complex allpass filters. We first introduce a complex analog allpass filter, designed using elliptic functions and the PR (Perfect Reconstruction) conditions. We use bilinear transformation to obtain the digital counterpart of this analog allpass filter. Depending on the parity of the order N of the complex allpass filter, the resulting IIR filters in the filter bank can be either real or complex. If N is even, the IIR filters are real, otherwise they are complex. Using complex IIR analysis filters, the corresponding magnitude responses have an extra zero around ω = 3π/2. The method is illustrated by means of examples. ©2006 IEEE.
Original languageAmerican English
Pages1063-1066
Number of pages956
DOIs
StatePublished - 1 Dec 2006
Externally publishedYes
EventIEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS -
Duration: 1 Dec 2006 → …

Conference

ConferenceIEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS
Period1/12/06 → …

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Fernandez-Vazquez, A., & Jovanovic-Dolecek, G. (2006). Design of real and complex linear-phase IIR modified QMF banks. 1063-1066. Paper presented at IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS, . https://doi.org/10.1109/APCCAS.2006.342272