Eigen-Beam Processing for Direction-of-Arrival Estimation Using Spherical Apertures

Conference contribution


Publication Details

Author(s): Teutsch H, Kellermann W
Publication year: 2005
Language: English


Abstract

In [1] a method of decomposing a 3D wave field into spherical harmonics
(’eigen-beams’) by using spherical microphone arrays was introduced. It
was further shown how the eigen-beams can be used for beamforming
applications by means of a modal beamformer structure. This paper
introduces a method for the unambiguous localization of multiple
wideband acoustic sources in 3D space using the eigen-beams of [1]. It
was shown in [1] that the response of a continuous spherical aperture of
radius R to a plane wave impinging from (θ, φ), can be expressed as, F m
n (kR, θ, φ) = i n bn(kR)Y m n (θ, φ) ∗ = i n bn(kR) where (·) ∗
denotes the conjugate complex operation, i 2 = −1, k is the wavenumber, Y
m n n and degree m, P m n (·) is the associated Legendre function of
order n and degree m, and ⎨ jn(kR) bn(kR) = jn(kR) − h(1) ′ n j ′ n
(kR) h(1)


FAU Authors / FAU Editors

Kellermann, Walter Prof. Dr.-Ing.
Professur für Nachrichtentechnik


How to cite

APA:
Teutsch, H., & Kellermann, W. (2005). Eigen-Beam Processing for Direction-of-Arrival Estimation Using Spherical Apertures. In Proceedings of the Conf. Rec. Joint Workshop for Hands-Free Speech Communication and Microphone Arrays (HSCMA). Piscataway, NJ, US.

MLA:
Teutsch, Heinz, and Walter Kellermann. "Eigen-Beam Processing for Direction-of-Arrival Estimation Using Spherical Apertures." Proceedings of the Conf. Rec. Joint Workshop for Hands-Free Speech Communication and Microphone Arrays (HSCMA), Piscataway, NJ 2005.

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Last updated on 2019-10-06 at 15:10