Change search
ReferencesLink to record
Permanent link

Direct link
Multicriteria Design of Oversampled Uniform DFT Filter Banks
Responsible organisation
2004 (English)In: IEEE Signal Processing Letters, ISSN 1070-9908, E-ISSN 1558-2361, Vol. 11, no 6, 541-544 p.Article in journal (Refereed) Published
Abstract [en]

Subband adaptive filters have been proposed to avoid the drawbacks of slow convergence and high computational complexity associated with time domain adaptive filters. However, subband processing causes signal degradations due to aliasing effects and amplitude distortions. This problem is unavoidable due to further filtering operations in subbands. In this letter, the problems of aliasing effect and amplitude distortion are studied. Prototype filters which are optimized with respect to those properties are designed and their performances are compared. Moreover, the effect of the number of subbands, the oversampling factors and the length of the prototype filter are also studied. Using the multicriteria formulation, all Pareto optimums are sought via the nonlinear programming technique. We find that the prototype filter designed via the Kaiser window provides the best overall performance among the methods we studied. Also, there is a critical oversampling factor beyond which the improvement of performance is diminishing. Finally, if the length of the prototype filter increases with the number of subbands, an increase in the number of subbands will not deteriorate the performance.

Place, publisher, year, edition, pages
IEEE , 2004. Vol. 11, no 6, 541-544 p.
Keyword [en]
Aliasing effect, amplitude distortion, filter bank, nonlinear programming, Pareto optimum, subband adaptive filter.
National Category
Signal Processing
URN: urn:nbn:se:bth-8481DOI: 10.1109/LSP.2004.826676Local ID: diva2:836205
Available from: 2012-09-18 Created: 2008-08-14 Last updated: 2015-06-30Bibliographically approved

Open Access in DiVA

fulltext(204 kB)42 downloads
File information
File name FULLTEXT01.pdfFile size 204 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text
In the same journal
IEEE Signal Processing Letters
Signal Processing

Search outside of DiVA

GoogleGoogle Scholar
Total: 42 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 25 hits
ReferencesLink to record
Permanent link

Direct link