A vector-sensor consisting of a monopole sensor collocated with orthogonally oriented dipole sensors is used for direction of arrival (DOA) estimation in the presence of an isotropic noise-field or internal device noise. A maximum likelihood (ML) DOA estimator is derived and subsequently shown to be a special case of DOA estimation by means of a search for the direction of maximum steered response power (SRP). The problem of SRP maximization with respect to a vector-sensor can be solved with a computationally inexpensive algorithm. The ML estimator achieves asymptotic efficiency and thus outperforms existing estimators with respect to the mean square angular error (MSAE) measure. The beampattern associated with the ML estimator is shown to be identical to that used by the minimum power distortionless response beamformer for the purpose of signal enhancement.
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February 2012
February 14 2012
Maximum likelihood estimation of direction of arrival using an acoustic vector-sensor
Dovid Levin;
Dovid Levin
Faculty of Engineering,
Bar-Ilan University
, Ramat-Gan, Israel
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Emanuël A. P. Habets;
Sharon Gannot
Sharon Gannot
Faculty of Engineering,
Bar-Ilan University
, Ramat-Gan, Israel
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a)
Author to whom correspondence should be addressed. Electronic mail: emanuel.habets@audiolabs-erlangen.de
b)
A joint institution between the Friedrich-Alexander University of Erlangen-Nuremberg and Fraunhofer IIS, Germany.
J. Acoust. Soc. Am. 131, 1240–1248 (2012)
Article history
Received:
July 13 2011
Accepted:
December 22 2011
Citation
Dovid Levin, Emanuël A. P. Habets, Sharon Gannot; Maximum likelihood estimation of direction of arrival using an acoustic vector-sensor. J. Acoust. Soc. Am. 1 February 2012; 131 (2): 1240–1248. https://doi.org/10.1121/1.3676699
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