A reduced complexity approach to IAA beamforming for efficient DOA estimation of coherent sources
López Vicario, José (Universitat Autònoma de Barcelona. Departament de Telecomunicació i Enginyeria de Sistemes)
Barceló Lladó, Marc (Universitat Autònoma de Barcelona. Departament de Telecomunicació i Enginyeria de Sistemes)
Seco Granados, Gonzalo (Universitat Autònoma de Barcelona. Departament de Telecomunicació i Enginyeria de Sistemes)

Date:	2010
Abstract:	We address the 2D direction-of-arrival (DOA) estimation problem in scenarios with coherent sources. More specifically, we adopt beamforming solutions based on the iterative adaptive approach (IAA) recently proposed in the literature. The motivation of such adoption mainly comes from the excellent behavior these beamformers provide in scenarios with coherent sources. Nonetheless, these strategies suffer from a prohibitive computational complexity, especially in 2D scenarios. In order to alleviate the, we propose two reduced-complexity (RC) versions of the IAA and IAA based on maximum likelihood (IAA-ML) algorithms. The proposed beamformers are referred to as IAA-RC and IAA-ML-RC and provide similar results to those obtained with their original counterparts. Computational complexity, however, is further reduced. Numerical results presented in the paper show that the computational burden can be decreased by a 52 with our proposed solutions in the considered scenarios.
Grants:	Ministerio de Ciencia e Innovación TEC2008-06305/TEC Agència de Gestió d'Ajuts Universitaris i de Recerca 2009/SGR-298
Note:	Altres ajuts : Chair of Knowledge and Technology Transfer Parc de Recerca UAB-Santander
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Adaptive approach ; Beamformers ; Coherent sources ; Computational burden ; Direction-of-arrival estimation ; DOA estimation ; Numerical results ; Reduced-complexity
Published in:	Eurasip Journal on Advances in Signal Processing, Vol. 2011 (December 2010) , art. 521265, ISSN 1687-6180

DOI: 10.1155/2011/521265

16 p, 1.2 MB

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