Table of Contents
ISRN Applied Mathematics
Volume 2012 (2012), Article ID 710979, 10 pages
http://dx.doi.org/10.5402/2012/710979
Research Article

Geometric Location Based on TDOA for Wireless Sensor Networks

Key Libratory of Universal Wireless Network, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received 24 August 2011; Accepted 10 October 2011

Academic Editors: Y.-D. Kwon and V. Plagianakos

Copyright © 2012 Xin-long Luo 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

Wireless sensor networks (WSNs) consist of a large number of low-cost miniature sensors, which can be applied to battlefield surveillance, environmental monitoring, target tracking, and other applications related to the positions of sensors. The location information of sensors is of great importance for wireless sensor networks. In this paper, we propose a new localization algorithm for the wireless sensor network based on time difference of arrival (TDOA), which is a typical algorithm in the wireless localization field. In order to improve the localization accuracy of a sensor, a new strategy is proposed for a localized sensor being upgraded to an anchor node, which is used to localize the position of the next sensor. Performance analysis and simulation results show that the revised TODA localization algorithm has the higher localization accuracy when compared with the original TDOA location method.