Design of oversampled uniform dft filter banks with delay specification using quadratic optimization

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Jan Mark de Haan, Nedelko Grbic, Sven Nordholm, Ingvar Claesson
Title: Design of oversampled uniform dft filter banks with delay specification using quadratic optimization
Translated title: Översamplad design av likformig DFT filterbank med specificerad delay med kvadratisk optimering
Conference name: The 2001 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP'01
Year: 2001
Pagination: 3633-3636
Publisher: Institute of Electrical and Electronics Engineers Inc.
City: Salt Lake City
ISI number: 000173806500910
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, ngr@bth.se, sven@atri.curtin.edu.au, icl@bth.se
Language: English
Abstract: Subband adaptive filters have been proposed to avoid the drawbacks of slow
convergence and high computational complexity associated with time domain
adaptive filters. Subband processing introduces transmission delays caused
by the filter bank and signal degradations due to aliasing effects.
One efficient way to reduce the aliasing effects is to allow a higher sample
rate than critically needed in the subbands and thus reduce subband signal
degradation. We suggest a design method, for uniform DFT filter banks with
any oversampling factor, where the total filter bank group delay may be
specified, and where the aliasing and magnitude/phase distortions are minimized.
Summary in Swedish: Filterbank design är av stor betydelse för applikationer där talsignaler skall behandlas. Arbetet beskriver en ny effektiv metod för att skapa översamplade filterbankar för talsignal-applikationer.
Subject: Signal Processing\Filter Design
Signal Processing\Beamforming
Keywords: oversampled, subbands, beamforming, quadratic, optimization
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