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Complexity reduction in low-delay Farrow-structure-based variable fractional delay FIR filters utilizing linear-phase subfilters
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Electronics System. (ElektronikSystem)
Linköping University, Department of Electrical Engineering, Electronics System. Linköping University, The Institute of Technology.
2012 (English)Conference paper, Published paper (Refereed)
Abstract [en]

This paper proposes a method to design low-delay fractional delay (FD) filters, using the Farrow structure. The proposed method employs both linear-phase and nonlinear-phase finite-length impulse response (FIR) subfilters. This is in contrast to conventional methods that utilize only nonlinear-phase FIR subfilters. Two design cases are considered. The first case uses nonlinear-phase FIR filters in all branches of the Farrow structure. The second case uses linear-phase FIR filters in every second branch. These branches have milder restrictions on the approximation error. Therefore, even with a reduced order, for these linear-phase FIR filters, the approximation error is not affected. However, the arithmetic complexity, in terms of the number of distinct multiplications, is reduced by an average of 30%. Design examples illustrate the method.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2012. 21-24 p.
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:liu:diva-84866DOI: 10.1109/ECCTD.2011.6043300ISBN: 978-1-4577-0616-5 (print)ISBN: 978-1-4577-0617-2 (print)OAI: oai:DiVA.org:liu-84866DiVA: diva2:562678
Conference
Eur. Conf. Circuit Theory Design
Available from: 2012-10-31 Created: 2012-10-25 Last updated: 2012-10-31Bibliographically approved

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Eghbali, AmirJohansson, Håkan
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