TY - JOUR
T1 - Passive bistatic ground-based synthetic aperture radar
T2 - Concept, system, and experiment results
AU - Feng, Weike
AU - Friedt, Jean Michel
AU - Nico, Giovanni
AU - Wang, Suyun
AU - Martin, Gilles
AU - Sato, Motoyuki
N1 - Funding Information:
Funding: The Besancon Observatory (France) supported this research activity through an SRO grant. This work was also supported by JSPS Grant-in-Aid for Scientific Research (A) 26249058.
Publisher Copyright:
© 2019 by the authors.
PY - 2019/8/1
Y1 - 2019/8/1
N2 - 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.
AB - 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.
KW - Displacement estimation
KW - Ground-based synthetic aperture radar (GB-SAR)
KW - Passive bistatic radar (PBR)
KW - Satellite digital TV signal
KW - Synthetic aperture radar (SAR) imaging
UR - http://www.scopus.com/inward/record.url?scp=85070477095&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85070477095&partnerID=8YFLogxK
U2 - 10.3390/rs11151753
DO - 10.3390/rs11151753
M3 - Article
AN - SCOPUS:85070477095
VL - 11
JO - Remote Sensing
JF - Remote Sensing
SN - 2072-4292
IS - 15
M1 - 1753
ER -