Filter Bank Design for Subband Adaptive Filtering Applications

Document type: Researchreports
Full text:
Author(s): Jan Mark de Haan, Nedelko Grbic, Ingvar Claesson
Title: Filter Bank Design for Subband Adaptive Filtering Applications
Series: Research Report
Year: 2001
Issue: 5
ISSN: 1103-1581
Organization: Blekinge Institute of Technology
Department: Department of Telecommunications and Signal Processing (Institutionen för telekommunikation och signalbehandling)
Department of Telecommunications and Signal Processing S-372 25 Ronneby
+46 455 38 50 00
Authors e-mail: jmd@bth.se
Language: English
Abstract: Subband adaptive filtering has been proposed to improve the convergence rate while reducing the computational complexity associated with time domain adaptive filters. Subband processing introduces transmission delays caused by the filters in the filter bank and signal degradations due to aliasing effects. One way to reduce the aliasing effects is to impose oversampling in subbands rather than critical sampling and thus reduce signal degradation. By doing so, additional degrees of freedom are introduced for the design of filter banks which may be optimally exploited. In this report, a design method for modulated uniform filter banks with any oversampling is suggested, where the analysis filter bank delay and the total filter bank delay may be specified, and where the aliasing and magnitude/phase distortions are minimized.
Subject: Signal Processing\Speech Enhancement
Signal Processing\Filter Design
Keywords: Filter Bank Design, Subband Adaptive Filtering
URN: urn:nbn:se:bth-00179
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