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Eigenbeam-ESPRIT for DOA-Vector estimation

: Herzog, A.; Habets, E.A.P.


IEEE Signal Processing Letters 26 (2019), No.4, pp.572-576
ISSN: 1070-9908
ISSN: 1558-2361
Journal Article
Fraunhofer IIS ()

Several techniques exist to estimate the directions of arrival (DOAs) of sound sources captured with a spherical microphone array. The eigenbeam rotational invariance technique (EB-ESPRIT) uses recurrence relations of spherical harmonics to estimate the DOAs. In this letter, we propose a new EB-ESPRIT method which uses three recurrence relations and a joint-diagonalization procedure to estimate the unit-vectors pointing to the source DOAs. We evaluate the angular estimation errors of the proposed method under noisy and reverberant conditions and compare it to existing EB-ESPRIT methods. We find that our proposed method can estimate the source DOAs with higher accuracy compared to the discussed existing EB-ESPRIT methods, and the estimation accuracy does not depend on the source DOAs.