DocumentCode :
1732909
Title :
How to design a delay-and-sum beamformer for rigid rotationally symmetric arrays?
Author :
Helwani, Karim ; Spors, Sascha ; Buchner, Herbert
Author_Institution :
Quality & Usability Lab., Tech. Univ. Berlin, Berlin, Germany
fYear :
2012
Firstpage :
203
Lastpage :
206
Abstract :
In this paper we present two novel techniques with low computational complexity and high robustness for beamforming using rigid microphone arrays. For the first one we show which approximations have to be made in terms of applying techniques that are equivalent to delay-and-sum beamforming on rigid microphone arrays. In the second approach we exploit the technique of focused sinks for creating virtual linear microphone arrays with flexible dimensions and spacing. As a result, simple techniques for beamforming using linear arrays can be applied. We derive our approaches analytically, state their theoretical limits and provide simulation results and discuss the results.
Keywords :
approximation theory; array signal processing; computational complexity; microphone arrays; approximations; delay-and-sum beamformer; low computational complexity; rigid microphone arrays; virtual linear microphone arrays;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signals, Systems and Computers (ASILOMAR), 2012 Conference Record of the Forty Sixth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
ISSN :
1058-6393
Print_ISBN :
978-1-4673-5050-1
Type :
conf
DOI :
10.1109/ACSSC.2012.6488990
Filename :
6488990
Link To Document :
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