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Article

Passive Bistatic Ground-Based Synthetic Aperture Radar: Concept, System, and Experiment Results

1
Graduate School of Environmental Studies, Tohoku University, 980-8579 Sendai, Japan
2
FEMTO-ST, Time & Frequency Department, 25000 Besancon, France
3
Consiglio Nazionale delle Ricerche, Istituto per le Applicazioni del Calcolo, 70126 Bari, Italy
4
Center for Northeast Asian Studies, Tohoku University, 980-8576 Sendai, Japan
*
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(15), 1753; https://doi.org/10.3390/rs11151753
Received: 1 July 2019 / Revised: 15 July 2019 / Accepted: 23 July 2019 / Published: 25 July 2019
A passive bistatic ground-based synthetic aperture radar (PB-GB-SAR) system without a dedicated transmitter has been developed by using commercial-off-the-shelf (COTS) hardware for local-area high-resolution imaging and displacement measurement purposes. Different from the frequency-modulated or frequency-stepped continuous wave signal commonly used by GB-SAR, the continuous digital TV signal broadcast by a geostationary satellite has been adopted by PB-GB-SAR. In order to increase the coherence between the reference and surveillance channels, frequency and phase synchronization of multiple low noise blocks (LNBs) has been conducted. Then, the back-projection algorithm (BPA) and the range migration algorithm (RMA) have been modified for PB-GB-SAR to get the focused SAR image. Field experiments have been carried out to validate the designed PB-GB-SAR system and the proposed methods. It has been found that different targets within 100 m (like the fence, light pole, tree, and car) can be imaged by the PB-GB-SAR system. With a metallic plate moved on a positioner, it has been observed that the displacement of the target can be estimated by PB-GB-SAR with submillimeter accuracy. View Full-Text
Keywords: ground-based synthetic aperture radar (GB-SAR); passive bistatic radar (PBR); satellite digital TV signal; synthetic aperture radar (SAR) imaging; displacement estimation ground-based synthetic aperture radar (GB-SAR); passive bistatic radar (PBR); satellite digital TV signal; synthetic aperture radar (SAR) imaging; displacement estimation
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MDPI and ACS Style

Feng, W.; Friedt, J.-M.; Nico, G.; Wang, S.; Martin, G.; Sato, M. Passive Bistatic Ground-Based Synthetic Aperture Radar: Concept, System, and Experiment Results. Remote Sens. 2019, 11, 1753. https://doi.org/10.3390/rs11151753

AMA Style

Feng W, Friedt J-M, Nico G, Wang S, Martin G, Sato M. Passive Bistatic Ground-Based Synthetic Aperture Radar: Concept, System, and Experiment Results. Remote Sensing. 2019; 11(15):1753. https://doi.org/10.3390/rs11151753

Chicago/Turabian Style

Feng, Weike, Jean-Michel Friedt, Giovanni Nico, Suyun Wang, Gilles Martin, and Motoyuki Sato. 2019. "Passive Bistatic Ground-Based Synthetic Aperture Radar: Concept, System, and Experiment Results" Remote Sensing 11, no. 15: 1753. https://doi.org/10.3390/rs11151753

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