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Titolo:
Hybrid subband/frequency-domain adaptive systems
Autore:
Eneman, K; Moonen, M;
Indirizzi:
Katholieke Univ Leuven, ESAT, SISTA, B-3001 Louvain, Belgium Katholieke Univ Leuven Louvain Belgium B-3001 A, B-3001 Louvain, Belgium
Titolo Testata:
SIGNAL PROCESSING
fascicolo: 1, volume: 81, anno: 2001,
pagine: 117 - 136
SICI:
0165-1684(200101)81:1<117:HSAS>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Keywords:
subband adaptive filtering; frequency-domain adaptive filtering; filter bank design; echo cancellation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Eneman, K Katholieke Univ Leuven, ESAT, SISTA, Kardinaal Marcierlaan 94, B-3001 Louvain, Belgium Katholieke Univ Leuven Kardinaal Marcierlaan 94 Louvain Belgium B-3001
Citazione:
K. Eneman e M. Moonen, "Hybrid subband/frequency-domain adaptive systems", SIGNAL PROC, 81(1), 2001, pp. 117-136

Abstract

For many years now, subband and frequency-domain adaptive filtering techniques have been proposed for the identification of high-order FIR systems. Classical LMS-based algorithms are less attractive as their computational load is higher and their convergence behaviour for coloured inputs is worse. Subband processing has many desirable properties. However, when used to implement adaptive filters, various effects (such as residual errors and slow convergence due to aliasing) occur and reduce performance. On the other hand, it is known that frequency-domain adaptive filters do not suffer from these problems despite being (nearly) equivalent to subband adaptive filters,be it with "poor" filter banks (modulated sine frequency responses). In this paper the operation of the frequency-domain techniques are unravelled and explained in the "subband jargon" and among other things it will be shownhow aliasing is compensated for in the frequency-domain approach. This paper aims at generalising frequency-domain aliasing-compensation techniques to subband adaptive systems. Further, some design criteria for subband adaptive systems are formulated. Three realisation conditions and an alternativeadaptation scheme will be proposed. Standard subband adaptive filters cannot fulfil all conditions, whereas for frequency-domain-based algorithms thedesign criteria are met. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 09/07/20 alle ore 20:57:15