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Adjustable fractional-delay FIR filters using the Farrow structure and multirate techniques
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Electronics System.
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Electronics System.ORCID iD: 0000-0003-3470-3911
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Electronics System.
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Electronics System.
2006 (English)In: Asia Pacific Conference on Circuits and Systems,2006, 2006, 1055-1058 p.Conference paper, Published paper (Refereed)
Abstract [en]

The Farrow structure can be used for efficient realization of adjustable fractional-delay finite-length impulse response (FIR) filters, but, nevertheless, its implementation complexity grows rapidly as the bandwidth approaches the full bandwidth. To reduce the complexity, a multirate approach can be used. In this approach, the input signal is first interpolated by a factor of two via the use of a fixed half-band linearphase FIR filter. Then, the actual fractional-delay filtering takes place. Finally, the so generated signal is downsampled to retain the original input/output sampling rate. In this way, the bandwidth of the fractional-delay filter used is halved compared to the overall bandwidth. Because the complexity of halfband linear-phase FIR filter interpolators is low, the overall complexity can be reduced. In this paper, we present more implementation details, design trade-offs, and comparisons when the filters are implemented using multiple constant multiplication techniques, which realize a number of constant multiplications with a minimum number of adders and subtracters.

Place, publisher, year, edition, pages
2006. 1055-1058 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-37079DOI: 10.1109/APCCAS.2006.342270Local ID: 33613OAI: oai:DiVA.org:liu-37079DiVA: diva2:257928
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2015-03-11

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Johansson, HåkanGustafsson, OscarJohansson, KennyWanhammar, Lars

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  • apa
  • harvard1
  • ieee
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  • vancouver
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  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf