Open Access

A Novel Approach to the Design of Oversampling Low-Delay Complex-Modulated Filter Bank Pairs

EURASIP Journal on Advances in Signal Processing20092009:692861

Received: 15 December 2008

Accepted: 9 September 2009

Published: 28 October 2009


In this contribution we present a method to design prototype filters of oversampling uniform complex-modulated FIR filter bank pairs. Especially, we present a noniterative two-step procedure: (i) design of analysis prototype filter with minimum group delay and approximately linear-phase frequency response in the passband and the transition band and (ii) Design of synthesis prototype filter such that the filter bank pairs distortion function approximates a linear-phase allpass function. Both aliasing and imaging are controlled by introducing sophisticated stopband constraints in both steps. Moreover, we investigate the delay properties of oversampling uniform complex-modulated FIR filter bank pairs in order to achieve the lowest possible filter bank delay. An illustrative design example demonstrates the potential of the design approach.

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Authors’ Affiliations

Digital Signal Processing Group, Ruhr-Universität Bochum


© Thomas Kurbiel et al. 2009

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.