Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/9354
Title: A hybrid descent method with genetic algorithm for microphone array placement design
Authors: Li, Z
Yiu, KFC 
Feng, Z
Keywords: Beamformer design
Genetic algorithm
Hybrid descent method
Microphone array
Microphone placement
Issue Date: 2012
Publisher: Elsevier
Journal: Applied soft computing 
Abstract: In beamformer design, the microphone locations are often fixed and only the filter coefficients are varied in order to improve on the noise reduction performance. However, the positions of the microphone elements play an important role in the overall performance and should be optimized at the same time. However, this nonlinear optimization problem is non-convex and local search techniques might not yield the best result. This problem is addressed in this paper. A hybrid descent method is proposed which consists of a genetic algorithm together with a gradient-based method. The gradient-based method can help to locate the optimal solution rapidly around the start point, while the genetic algorithm is used to jump out from local minima. This hybrid method has the descent property and can help us to find the optimal placement for better beamformer design. Numerical examples are provided to demonstrate the effectiveness of the method.
URI: http://hdl.handle.net/10397/9354
ISSN: 1568-4946
EISSN: 1872-9681
DOI: 10.1016/j.asoc.2012.02.027
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