Design of Robust Steerable Broadband Beamformers with Spiral Arrays and the Farrow Filter Structure
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Authors
Lai, Chiong
Nordholm, Sven
Leung, Yee-Hong
Date
2010Type
Conference Paper
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Lai, Chiong-Ching and Nordholm, Sven and Leung, Yee-Hong. 2010. Design of Robust Steerable Broadband Beamformers with Spiral Arrays and the Farrow Filter Structure, in Gannot, S. and Cohen, I. (ed), International Workshop on Acoustic Echo and Noise Control 2010 (IWAENC 2010), Aug 30 2010, pp. 653-669. Tela Aviv, Israel: Ortra.
Source Title
Proceedings of IWAENC 2010
Source Conference
International Workshop on Acoustic Echo and Noise control (IWAENC)
School
Department of Electrical and Computer Engineering
Collection
Abstract
This paper extends the design of steerable broadband beamformers by incorporating robustness in the design formulation to cater for microphone mismatches and other non-ideal characteristics. In our method, a 2 norm constraint on the filter weights is imposed in the design optimisation problem. This constraint limits the 2-norm of the filter weights, thus reducing the sensitivity of the beamformer towards the non-ideal characteristics of the microphones. Design examples and comparisons are presented to illustrate our approach.
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