Paper Info
Title
A Study on the Effects of Sensor Position Error and the Placement of Calibration Emitter for Source Localization
Abstract
Modern applications use mobile or randomly deployed sensors whose positions are not precise when locating a signal source. An estimator would require statistical knowledge of the sensor position errors to reach the optimum localization performance. Further accuracy improvement necessitates a calibration emitter whose position is known exactly to correct the sensor positions. Under Gaussian error model, this paper shows that when the covariance matrices of the sensor position errors and the measurement noise satisfy certain relation, taking the sensor position errors into account is not necessary and a simpler estimator that pretends the sensor position uncertainties are absent is sufficient to reach the optimum performance. The performance gain from a calibration emitter depends on where it is placed. We derive the optimum calibration position by improving the Fisher information matrix of the source location estimate. The optimum position is of theoretical interest and may not be practical. A suboptimum criterion for realistic calibration emitter placement is then proposed. We shall use TOA, TDOA, and AOA localizations to illustrate the derived results. Simulations support very much the theoretical developments and performance analysis.
Year
DOI
Venue
2014
10.1109/TWC.2014.2341609
IEEE Transactions on Wireless Communications
Keywords
DocType
Volume
randomly deployed sensors,measurement errors,sensor position error effects,source localization,calibration,source location estimation,TOA,calibration emitter,covariance matrices,TDOA,time of arrival localization,Fisher information matrix,AOA localization,Localization,angle of arrival localization,sensor position error,Gaussian processes,direction-of-arrival estimation,sensor position errors,Gaussian error model,sensor placement,time-of-arrival estimation,calibration emitter placement,statistical knowledge,time difference of arrival localization,measurement noise,optimum localization performance
Journal
13
Issue
ISSN
Citations 
10
1536-1276
8
PageRank 
References 
Authors
0.55
25
2
Name
Order
Citations
PageRank
Zhenhua Ma1192.20
K.C. Ho21311148.28