A distributed positioning algorithm for cooperative active and passive sensors
Date
2010Source Title
21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications
Publisher
IEEE
Pages
1713 - 1718
Language
English
Type
Conference PaperItem Usage Stats
186
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views
123
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downloads
Abstract
The problem of positioning a target node is studied for wireless sensor networks with cooperative active and passive sensors. Two-way time-of-arrival and time-difference-of-arrival measurements made by both active and passive nodes are used to estimate the position of the target node. A maximum likelihood estimator (MLE) can be employed to solve the problem. Due to the nonlinear nature of the cost function in the MLE, an iterative search might converge to local minima which often results in large estimation errors. To avoid this drawback, we instead formulate the problem of positioning as finding the intersection of a number of convex sets derived from measurements. To obtain this intersection, we apply the projection onto convex sets approach, which is robust and can be implemented in a distributed manner. Simulations are performed to compare the performance of the MLE and the proposed method. ©2010 IEEE.
Keywords
Large estimation errorsLocal minimums
Maximum likelihood estimator
Nonlinear nature
Passive sensor
Projection onto convex sets
Target nodes
Time-difference-of-arrival
Time-of-arrival
Wireless sensor
Blind source separation
Estimation
Maximum likelihood estimation
Problem solving
Radio communication
Sensor networks
Sensor nodes
Set theory
Wireless sensor networks
Permalink
http://hdl.handle.net/11693/28457Published Version (Please cite this version)
http://dx.doi.org/10.1109/PIMRC.2010.5671918Collections
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