Calibration errors of uniform linear sensor arrays for DOA estimation: an analysis with SRP-PHAT

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Full text:
Author(s): Mikael Swartling, Nedelko Grbic
Title: Calibration errors of uniform linear sensor arrays for DOA estimation: an analysis with SRP-PHAT
Journal: Signal Processing
Year: 2011
Volume: 91
Issue: 4
Pagination: 1071-1075
ISSN: 0165-1684
Publisher: Elsevier
URI/DOI: 10.1016/j.sigpro.2010.09.018
ISI number: 000286864700040
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Electrical Engineering (Sektionen för ingenjörsvetenskap - Avd. för elektroteknik)
School of Engineering S-371 79 Karlskrona
+46 455 38 50 00
http://www.bth.se/ing/
Authors e-mail: msw@bth.se
Language: English
Abstract: This article presents an analysis of the sensitivity of geometrical sensor errors in acoustic source localization using the well-established SRP-PHAT method. The array in this analysis is a uniform linear array and the intended source is human speech in the far field. Two major results are presented: inner-sensor geometrical errors in the linear array produce smaller localization errors than corresponding geometrical errors do in the two end-point sensors, and the localization error rises sharply for a total geometrical error exceeding the equivalence of the acoustic propagation distance of 2/3 of the sample time instance (approximately 3 cm at 8 kHz). The article also provides a mathematical and graphical explanation of the results.
Subject: Signal Processing\General
Keywords: Direction of arrival estimation, Calibration
Edit