Range-Free Localization with the Radical Line

Details Range-Free Localization with the Radical Line Range-Free Localization with the Radical Line

2010-01-21

arxiv.org/abs/1001.3760v1

Computer Science

Information Theory

Proc. IEEE ICC'10, Cape Town, South Africa, May, 2010

Scientific paper

Due to hardware and computational constraints, wireless sensor networks (WSNs) normally do not take measurements of time-of-arrival or time-difference-of-arrival for rangebased localization. Instead, WSNs in some applications use rangefree localization for simple but less accurate determination of sensor positions. A well-known algorithm for this purpose is the centroid algorithm. This paper presents a range-free localization technique based on the radical line of intersecting circles. This technique provides greater accuracy than the centroid algorithm, at the expense of a slight increase in computational load. Simulation results show that for the scenarios studied, the radical line method can give an approximately 2 to 30% increase in accuracy over the centroid algorithm, depending on whether or not the anchors have identical ranges, and on the value of DOI.

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