Motion Detection Using Rao Test in Dual-Satellite Geolocation System

Dual-satellite geolocation system can locate a stationary emitter on Earth by using time and frequency difference of arrival (TDOA/FDOA). However, emitter motion will cause a bias on the FDOA, resulting in calculated positions with unacceptable errors. If motion is detected, the position is known to...

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Bibliographic Details
Main Authors: Hewen Wei, Changxiong Xia, Shangfu Ye
Format: Conference Proceeding
Language:English
Subjects:
Analytical models
Availability
Frequency
Motion detection
Motion estimation
Motion measurement
Performance analysis
Position measurement
Satellite ground stations
System testing
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Summary:Dual-satellite geolocation system can locate a stationary emitter on Earth by using time and frequency difference of arrival (TDOA/FDOA). However, emitter motion will cause a bias on the FDOA, resulting in calculated positions with unacceptable errors. If motion is detected, the position is known to be inaccurate. An algorithm for motion detection based on TDOA/FDOA measurements is proposed by using Rao test which just needs the position estimation of stationary hypothesis. The performance is analyzed, and the availability is verified by the simulation results
ISSN:2164-5221
DOI:10.1109/ICOSP.2006.346051