DocumentCode :
476853
Title :
Localization under random measurements with application to radiation sources
Author :
Rao, Nageswara S V ; Shankar, Mallikarjun ; Chin, Jren-Chit ; Yau, David K Y ; Ma, Chris Y T ; Yang, Yong ; Hou, Jennifer C. ; Xu, Xiaochun ; Sahni, Sartaj
Author_Institution :
Oak Ridge Nat. Lab., Oak Ridge, TN
fYear :
2008
fDate :
June 30 2008-July 3 2008
Firstpage :
1
Lastpage :
8
Abstract :
We consider the problem of estimating the location of a target in 2D using random measurements of sensorspsila distance-differences to it. The linear algebraic solution to this problem becomes incomplete under random measurement errors, while the geometric method that always returns a solution has been developed only for 3-sensor configurations. We present three methods to extend the geometric method to a larger number of sensors, and compare their performance using simulations. We then consider two cases where measurements are collected over the same time-window at all sensors: (a) measurements are time-synchronized, and (b) measurements are independently collected within the time-window. We present the localization methods, mean of estimators and mean of measurements for case (a) and (b), respectively, and compare them using simulations.We describe a method for localizing point radiation sources from intensity measurements which uses the localization as a component. Based on simulation and test-bed results, our estimatorspsila performance improves with the number of sensors, and the mean of estimators method offers a better overall performance.
Keywords :
linear algebra; object detection; sensors; time-of-arrival estimation; differene of time-of-arrival localisation problem; intensity measurements; linear algebraic solution; localization methods; point radiation source localisation; random measurement errors; sensors; Distance-difference; detection and localization; point radiation source;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Fusion, 2008 11th International Conference on
Conference_Location :
Cologne
Print_ISBN :
978-3-8007-3092-6
Electronic_ISBN :
978-3-00-024883-2
Type :
conf
Filename :
4632200
Link To Document :
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