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15093 A geometrical perspective on localization
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Dulman, S.O. and Baggio, A. and Havinga, P.J.M. and Langendoen, K.G. (2008) A geometrical perspective on localization. In: Proceedings of the first ACM International Workshop on Mobile Entity Localization and Tracking in GPS-less Environments, 19 Sep 2008, San Francisco, California, USA. pp. 85-90. ACM. ISBN 978-1-60558-189-7

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A large number of localization algorithms for wireless sensor networks (WSNs) are evaluated against the Cramer-Rao Bound (CRB) as an indicator of how good the algorithm performs. The CRB defines the lower bound on the precision of an unbiased localization estimator. The CRB concept, borrowed from GPS localization, however, does not translate well to WSNs. In this paper, we show in which cases the CRB fails to capture troublesome anchor configurations leading to erroneous lower bounds. We continue with a study on the geometrical configurations of anchors favorable to localization algorithms. We conclude by proposing a metric to characterize the stability of the geometry of a certain anchor topology. Future work will address the combination of geometry and statistical metrics with the goal of obtaining a clear image on localization algorithms boundaries.

Item Type:Conference or Workshop Paper (Full Paper, Talk)
Research Group:EWI-PS: Pervasive Systems
Research Program:CTIT-WiSe: Wireless and Sensor Systems
Research Project:Featherlight Distributed Systems: A platform for the next generation of ambient systems
Uncontrolled Keywords:algorithms, design, theory
ID Code:15093
Deposited On:12 February 2009
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