Enhanced position estimation via node cooperation
Author
Sahinoglu, Z.
Gezici, Sinan
Date
2010Source Title
2010 IEEE International Conference on Communications
Print ISSN
0536-1486
Publisher
IEEE
Language
English
Type
Conference PaperItem Usage Stats
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Abstract
Two-way time-of-arrival (TW-ToA) is a widely used ranging protocol that can provide the distance between two devices without time synchronization. One drawback of the TW-ToA is poor positioning accuracy in the absence of a sufficient number of reference ranging devices. Also, for a self-positioning system with a limited battery life, it might be necessary to limit the number of transmissions while satisfying accuracy constraints. In this paper, a cooperative positioning protocol [1] is studied, which can improve positioning accuracy compared to the conventional TW-ToA based positioning systems and also facilitate positioning with fewer packet transmissions; hence, it can prolong battery life on average. The maximum likelihood estimator is obtained for the cooperative technique and the limits on the positioning accuracy are quantified in terms of the Cramer-Rao lower bound (CRLB). Simulation results are provided in order to show performance improvements. ©2010 IEEE.
Keywords
Cooperative positioningCramer-Rao lower bound (CRLB)
Maximum likelihood
Time-of-arrival (ToA)
Battery life
Cooperative positioning
Cramer-rao lower bound
Maximum likelihood estimator
Node cooperation
Packet transmissions
Performance improvements
Position estimation
Positioning accuracy
Positioning system
Self-positioning
Simulation result
Time synchronization
Time-of-arrival
Cramer-Rao bounds
Maximum likelihood estimation
Permalink
http://hdl.handle.net/11693/28558Published Version (Please cite this version)
http://dx.doi.org/10.1109/ICC.2010.5502319Collections
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