A method for efficient fractional sample delay generation for real-time frequency-domain beamformers

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Description

This paper presents an efficient method for fractional delay filter generation for frequency-domain beamformers. A common misunderstanding regarding frequency-domain beamforming is that any fractional time shift can be achieved using the delay property of the discrete Fourier transform (DFT). Blind application of the DFT delay property introduces circular convolution errors that may adversely affect the beam`s time series. The method presented avoids these errors while enabling real-time processing.

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8 p.

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Breeding, J.E. & Karnowski, T.P. July 1, 1995.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 14 times . More information about this article can be viewed below.

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Description

This paper presents an efficient method for fractional delay filter generation for frequency-domain beamformers. A common misunderstanding regarding frequency-domain beamforming is that any fractional time shift can be achieved using the delay property of the discrete Fourier transform (DFT). Blind application of the DFT delay property introduces circular convolution errors that may adversely affect the beam`s time series. The method presented avoids these errors while enabling real-time processing.

Physical Description

8 p.

Notes

OSTI as DE98000325

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  • 6. international conference on signal processing applicatioins and technology, Boston, MA (United States), 24-26 Oct 1995

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  • Other: DE98000325
  • Report No.: ORNL/CP--94457
  • Report No.: CONF-9510352--
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 642743
  • Archival Resource Key: ark:/67531/metadc695794

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • July 1, 1995

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 21, 2016, 9:55 p.m.

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Breeding, J.E. & Karnowski, T.P. A method for efficient fractional sample delay generation for real-time frequency-domain beamformers, article, July 1, 1995; Tennessee. (digital.library.unt.edu/ark:/67531/metadc695794/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.