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This article is part of the series Sensor Networks.

Open Access Research Article

Energy-Based Collaborative Source Localization Using Acoustic Microsensor Array

Dan Li* and Yu Hen Hu

Author Affiliations

Department of Electrical and Computer Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, WI 53706-1691, USA

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EURASIP Journal on Advances in Signal Processing 2003, 2003:985029  doi:10.1155/S1110865703212075

The electronic version of this article is the complete one and can be found online at: http://asp.eurasipjournals.com/content/2003/4/985029


Received:9 January 2002
Revisions received:13 October 2002
Published:30 March 2003

© 2003 Copyright © 2003 Hindawi Publishing Corporation

A novel sensor network source localization method based on acoustic energy measurements is presented. This method makes use of the characteristics that the acoustic energy decays inversely with respect to the square of distance from the source. By comparing energy readings measured at surrounding acoustic sensors, the source location during that time interval can be accurately estimated as the intersection of multiple hyperspheres. Theoretical bounds on the number of sensors required to yield unique solution are derived. Extensive simulations have been conducted to characterize the performance of this method under various parameter perturbations and noise conditions. Potential advantages of this approach include low intersensor communication requirement, robustness with respect to parameter perturbations and measurement noise, and low-complexity implementation.

Keywords:
target localization; source localization; acoustic sensors; collaborative signal processing; energy-based; sensor network

Research Article