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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

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Constrained adaptive broadband beamforming algorithm in frequency domain

Liu, Wei and Koh, C.L. and Weiss, S. (2004) Constrained adaptive broadband beamforming algorithm in frequency domain. In: Sensor Array and Multichannel Signal Processing Workshop Proceedings, 2004. IEEE, pp. 94-98. ISBN 0-7803-8545-4

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Abstract

In this paper, the linearly constrained minimum variance (LCMV) beamforming problem is formulated in the frequency domain based on the time-domain formulation of the cost function and the constraints. We then derive a frequency-domain constrained adaptive broadband beam-forming algorithm, which has a much lower computational complexity than the time-domain algorithm, although it suffers from a slower convergence speed, as shown by simulations. It is however an attractive option when the implementation of the time-domain algorithm is prohibitive due to large computational complexity. An alternative implementation of this constrained frequency-domain algorithm using the generalised sidelobe canceller (GSC) structure is also studied.