Overlap-save frequency invariant generalised sidelobe canceller

C.L. Koh, S. Weiss

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

In this paper, we propose a frequency invariant adaptive broadband beamformer based on an overlap-save frequency domain implementation of the generalised sidelobe canceller (GSC). Broadband signals drawn from a nested array are decomposed into frequency bins which are grouped into octaves. Subsequently, frequency dependent weighting assigned to individual frequency bins restricts the variation in spatial resolution usually associated with broadband arrays of fixed aperture. A GSC beamformer is incorporated to achieve adaptive nulling of interferers, but requires modifications to the constraint equation of the standard GSC in order to account for the frequency-dependent weighting of sensors. Simulation results highlighting the benefits of the proposed approach are presented.

Conference

Conference8th International Symposium on Signal Processing and Its Applications
CountryAustralia
CitySydney
Period28/08/0531/08/05

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Keywords

  • overlap-save
  • frequency
  • invariant
  • generalised
  • sidelobe canceller

Cite this

Koh, C. L., & Weiss, S. (2005). Overlap-save frequency invariant generalised sidelobe canceller. 379-382. Paper presented at 8th International Symposium on Signal Processing and Its Applications , Sydney, Australia. https://doi.org/10.1109/ISSPA.2005.1580275
Koh, C.L. ; Weiss, S. / Overlap-save frequency invariant generalised sidelobe canceller. Paper presented at 8th International Symposium on Signal Processing and Its Applications , Sydney, Australia.4 p.
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Koh, CL & Weiss, S 2005, 'Overlap-save frequency invariant generalised sidelobe canceller' Paper presented at 8th International Symposium on Signal Processing and Its Applications , Sydney, Australia, 28/08/05 - 31/08/05, pp. 379-382. https://doi.org/10.1109/ISSPA.2005.1580275

Overlap-save frequency invariant generalised sidelobe canceller. / Koh, C.L.; Weiss, S.

2005. 379-382 Paper presented at 8th International Symposium on Signal Processing and Its Applications , Sydney, Australia.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Overlap-save frequency invariant generalised sidelobe canceller

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AU - Weiss, S.

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N2 - In this paper, we propose a frequency invariant adaptive broadband beamformer based on an overlap-save frequency domain implementation of the generalised sidelobe canceller (GSC). Broadband signals drawn from a nested array are decomposed into frequency bins which are grouped into octaves. Subsequently, frequency dependent weighting assigned to individual frequency bins restricts the variation in spatial resolution usually associated with broadband arrays of fixed aperture. A GSC beamformer is incorporated to achieve adaptive nulling of interferers, but requires modifications to the constraint equation of the standard GSC in order to account for the frequency-dependent weighting of sensors. Simulation results highlighting the benefits of the proposed approach are presented.

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KW - overlap-save

KW - frequency

KW - invariant

KW - generalised

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Koh CL, Weiss S. Overlap-save frequency invariant generalised sidelobe canceller. 2005. Paper presented at 8th International Symposium on Signal Processing and Its Applications , Sydney, Australia. https://doi.org/10.1109/ISSPA.2005.1580275