Abstract
Passive radar based on the global navigation satellite positioning system (GNSS) has become the focus of attention in the field of radar. A parameter estimation method is proposed in the forward scatter radar (FSR) network based on GNSS to extend the application scenarios. For uniformly accelerating moving targets, only the instant times when the target crosses the individual baselines are used to retrieve the target motion parameters. The target position, velocity, and acceleration information can be obtained. Firstly, the minimum network configuration is derived theoretically. Then, the effects of crossing time error, station location error, transmitting/receiving station deployment, and target height on the accuracy are analyzed through Monte Carlo simulations. Finally, the simulation results indicate that the target position estimation error is in the order of 100 m. This paper provides the fundamental theory of aerial target positioning with a GNSS-based FSR network.
Highlights
Passive radar based on global navigation satellite positioning system (GNSS) has been researched for more than twenty years
As for the detection capability of the GNSS-based passive radar system in practical scenarios, some experimental verification results of various countries are summarized in Table 1, from when global position system (GPS) signals were used to detect civil aircraft, military aircraft, and Russian space stations in 1995 [3]
A parameter estimation method based on crossing time was studied in [26], but the transmitters and receivers were required to be deployed at equal intervals and in parallel
Summary
Passive radar based on GNSS has been researched for more than twenty years. GNSSbased passive radar has the advantages of wide coverage [1,2] and good concealment. As for the detection capability of the GNSS-based passive radar system in practical scenarios, some experimental verification results of various countries are summarized, from when global position system (GPS) signals were used to detect civil aircraft, military aircraft, and Russian space stations in 1995 [3]. Two different maritime targets were detected by up to 12 GNSS satellites belonging to different satellite constellations (GPS, Global Navigation Satellite System (GLONASS), and Galileo) simultaneously. Among these satellite constellations, the time difference of arrival (TDOA) location method is used to obtain the target position.
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