A generalised sidelobe canceller architecture based on oversampled subband decompositions

Research output: Contribution to conferencePaper

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Abstract

Adaptive broadband beamforming can be performed in oversampled subband signals, whereby an independent beamformer is operated in each frequency band. This has been shown to result in a considerably reduced computational complexity. In this paper, we primarily investigate the convergence behaviour of the generalised sidelobe canceller (GSC) based on normalised least mean squares algorithm (NLMS) when operated in subbands. The minimum mean squared error can be limited, amongst other factors, by the aliasing present in the subbands. With regard to convergence speed, there is strong indication that the subband-GSC converges faster than a fullband counterpart of similar modelling capabilities. Simulations are presented.
Original languageEnglish
Number of pages4
Publication statusPublished - 2000
Event5th International Conference on Mathematics in Signal Processing - University of Warwick, United Kingdom
Duration: 18 Dec 200020 Dec 2000

Conference

Conference5th International Conference on Mathematics in Signal Processing
CountryUnited Kingdom
CityUniversity of Warwick
Period18/12/0020/12/00

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Beamforming
Frequency bands
Computational complexity
Decomposition

Keywords

  • adaptive broadband beamforming
  • broadband beamforming
  • oversampled subband signals
  • convergence behaviour

Cite this

Weiss, S., Wei, L., & Stewart, R. (2000). A generalised sidelobe canceller architecture based on oversampled subband decompositions. Paper presented at 5th International Conference on Mathematics in Signal Processing, University of Warwick, United Kingdom.
Weiss, Stephan ; Wei, Liu ; Stewart, Robert. / A generalised sidelobe canceller architecture based on oversampled subband decompositions. Paper presented at 5th International Conference on Mathematics in Signal Processing, University of Warwick, United Kingdom.4 p.
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abstract = "Adaptive broadband beamforming can be performed in oversampled subband signals, whereby an independent beamformer is operated in each frequency band. This has been shown to result in a considerably reduced computational complexity. In this paper, we primarily investigate the convergence behaviour of the generalised sidelobe canceller (GSC) based on normalised least mean squares algorithm (NLMS) when operated in subbands. The minimum mean squared error can be limited, amongst other factors, by the aliasing present in the subbands. With regard to convergence speed, there is strong indication that the subband-GSC converges faster than a fullband counterpart of similar modelling capabilities. Simulations are presented.",
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author = "Stephan Weiss and Liu Wei and Robert Stewart",
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Weiss, S, Wei, L & Stewart, R 2000, 'A generalised sidelobe canceller architecture based on oversampled subband decompositions', Paper presented at 5th International Conference on Mathematics in Signal Processing, University of Warwick, United Kingdom, 18/12/00 - 20/12/00.

A generalised sidelobe canceller architecture based on oversampled subband decompositions. / Weiss, Stephan; Wei, Liu; Stewart, Robert.

2000. Paper presented at 5th International Conference on Mathematics in Signal Processing, University of Warwick, United Kingdom.

Research output: Contribution to conferencePaper

TY - CONF

T1 - A generalised sidelobe canceller architecture based on oversampled subband decompositions

AU - Weiss, Stephan

AU - Wei, Liu

AU - Stewart, Robert

PY - 2000

Y1 - 2000

N2 - Adaptive broadband beamforming can be performed in oversampled subband signals, whereby an independent beamformer is operated in each frequency band. This has been shown to result in a considerably reduced computational complexity. In this paper, we primarily investigate the convergence behaviour of the generalised sidelobe canceller (GSC) based on normalised least mean squares algorithm (NLMS) when operated in subbands. The minimum mean squared error can be limited, amongst other factors, by the aliasing present in the subbands. With regard to convergence speed, there is strong indication that the subband-GSC converges faster than a fullband counterpart of similar modelling capabilities. Simulations are presented.

AB - Adaptive broadband beamforming can be performed in oversampled subband signals, whereby an independent beamformer is operated in each frequency band. This has been shown to result in a considerably reduced computational complexity. In this paper, we primarily investigate the convergence behaviour of the generalised sidelobe canceller (GSC) based on normalised least mean squares algorithm (NLMS) when operated in subbands. The minimum mean squared error can be limited, amongst other factors, by the aliasing present in the subbands. With regard to convergence speed, there is strong indication that the subband-GSC converges faster than a fullband counterpart of similar modelling capabilities. Simulations are presented.

KW - adaptive broadband beamforming

KW - broadband beamforming

KW - oversampled subband signals

KW - convergence behaviour

M3 - Paper

ER -

Weiss S, Wei L, Stewart R. A generalised sidelobe canceller architecture based on oversampled subband decompositions. 2000. Paper presented at 5th International Conference on Mathematics in Signal Processing, University of Warwick, United Kingdom.