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International Journal of Distributed Sensor Networks
Volume 2011 (2011), Article ID 172902, 8 pages
http://dx.doi.org/10.1155/2011/172902
Research Article

Total Least Squares Method for Robust Source Localization in Sensor Networks Using TDOA Measurements

1College of Mathematics, Sichuan University, Chengdu 610064, China
2Networking Protocols Department, Institute for Infocomm Research, Singapore 138632
3School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798

Received 31 March 2011; Accepted 15 June 2011

Copyright © 2011 Yang Weng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The TDOA-based source localization problem in sensor networks is considered with sensor node location uncertainty. A total least squares (TLSs) algorithm is developed by a linear closed-form solution for this problem, and the uncertainty of the sensor location is formulated as a perturbation. The sensitivity of the TLS solution is also analyzed. Simulation results show its improved performance against the classic least squares approaches.