Design of robust superdirective beamformers as a convex optimization problem

Mabande E, Schad A, Kellermann W (2009)


Publication Language: English

Publication Status: Published

Publication Type: Conference contribution, Conference Contribution

Publication year: 2009

Pages Range: 77-80

Article Number: 4959524

Event location: Taipei TW

ISBN: 978-1-4244-2353-8

DOI: 10.1109/ICASSP.2009.4959524

Abstract

Broadband data-independent beamforming designs aiming at constant beamwidth often lead to superdirective beamformers for low frequencies, if the sensor spacing is small relative to the wavelengths. Superdirective beamformers are extremely sensitive to spatially white noise and to small errors in the array characteristics. These errors are nearly uncorrelated from sensor to sensor and affect the beamformer in a manner similar to spatially white noise. Hence the White Noise Gain (WNG) is a commonly used measure for the robustness of beamformer designs. In this paper, we present a method which incorporates a constraint for the WNG into a least-squares beamformer design and still leads to a convex optimization problem that can be solved directly, e.g. by Sequential Quadratic Programming. The effectiveness of this method is demonstrated by design examples. ©2009 IEEE.

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How to cite

APA:

Mabande, E., Schad, A., & Kellermann, W. (2009). Design of robust superdirective beamformers as a convex optimization problem. In Proceedings of the 2009 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2009 (pp. 77-80). Taipei, TW.

MLA:

Mabande, Edwin, Adrian Schad, and Walter Kellermann. "Design of robust superdirective beamformers as a convex optimization problem." Proceedings of the 2009 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2009, Taipei 2009. 77-80.

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