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Performance and complexity comparison of broadband beamforming structures

Koh, C.L. and Weiss, S. (2004) Performance and complexity comparison of broadband beamforming structures. In: Third IEEE Sensor Array and Multichannel Signal Processing Workshop, 2004-07-18 - 2004-07-21.

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In this paper, we compare low cost implementations of broadband adaptive beamformers, specifically the generalised sidelobe canceller, using least-mean squares type algorithms. DFT based techniques suffer from unjustified narrowband assumptions, or in case of overlap-save implementations, from potential slow convergence. Subband techniques offer a more robust convergence traded-off for a somewhat higher computational cost. Simulation results revealing some of the algorithms' properties are presented.