Single Channel Circular SAR Moving Targets Detection Based on Background Subtraction Algorithm
HONG Wen①②③ SHEN Wenjie①②③ LIN Yun①② BAO Qian①②③
①(National Key Laboratory of Science and Technocogy on Micvowave Imaging, Beijing 100190, China) ②(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) ③(University of Chinese Academy of Sciences, Beijing 100049, China)
Abstract：As a new high resolution ground imaging technique, Circular Synthetic Aperture Radar (CSAR) is capable of long time observation and retrieving the information of the targets. By taking the long time observation advantage, a new moving target detecting method is developed based on the single channel CSAR. Moving target signal model is analyzed with equal range equal Doppler equations, then the method is described. This method regards the original SAR image as combination of two images, one is background without moving target, the other one is foreground with moving target. Because the stationary background changes slower than the moving target signal. Thus median filter can be applied to a sequence of overlapping subaperture SAR images along the time to generate the background image. Next, each original frame is used to subtract the background image. Then the moving targets can be obtained. The proposed method is demonstrated on airborne CSAR moving targets dataset.
洪文,申文杰,林赟,鲍慊. 基于背景差分法的单通道圆迹SAR动目标检测算法研究[J]. 电子与信息学报, 2017, 39(9): 2182-2189.
HONG Wen, SHEN Wenjie, LIN Yun, BAO Qian. Single Channel Circular SAR Moving Targets Detection Based on Background Subtraction Algorithm. JEIT, 2017, 39(9): 2182-2189.
CUMMING I G and WONG F H. Digital Processing of Synthetic Aperture Radar Data Algorithms and Implementation[M]. Norwood, MA, US, Artech House Inc, 2005, Chapter 1.
[2]
PONCE O, IROALA P P, SCHEIBER R, et al. First airborne demonstration of holographic SAR tomography with fully polarimetric multicircular acquisitions at L-band[J]. IEEE Transactions on Geoscience and Remote Sensing, 2016, 54(10): 6170-6196. doi: 10.1109/TGRS.2016.2582959.
[3]
PONCE O, IROALA P P, PINHEIRO M, et al. Fully polarimetric high-resolution 3-D imaging with circular SAR at L-band[J]. IEEE Transactions on Geoscience and Remote Sensing, 2014, 52(6): 3074-3090. doi: 10.1109/TGRS. 2013. 2269194.
[4]
PALM S, ORIOT H M, and CANTALLOUBE H M. Radargrammetric DEM extraction over urban area using circular SAR imagery[J]. IEEE Transactions on Geoscience and Remote Sensing, 2012, 50(11): 4720-4725. doi: 10.1109 /TGRS.2011.2166081.
[5]
FROLIND P, GUSTAVSSON A, LUNDBERG M, et al. Circular-aperture VHF-band synthetic aperture radar for detection of vehicles in forest concealment[J]. IEEE Transactions on Geoscience and Remote Sensing, 2012, 50(4): 1329-1339. doi: 10.1109/TGRS.2011.2166081.
[6]
LIN Yun, HONG Wen, TAN Weixian, et al. Airborne circular SAR imaging: Results at P-band[C]. IEEE International Geoscience & Remote Sensing Symposium, Munich, Germany, 2012: 3074-3090. doi: 10.1109/IGARSS.2012.6352051.
[7]
RANEY R K. Synthetic aperture imaging radar and moving targets[J]. IEEE Transactions on Aerospace and Electronic Systems, 1971, AES-7(3): 499-505. doi: 10.1109/TAES.1971. 310292.
[8]
FIENUP J R. Detecting moving targets in SAR imagery by focusing[J]. IEEE Transactions on Aerospace and Electronic Systems, 2001, 37(3): 794-809. doi: 10.1109/7.953237.
[9]
MAKHOUL E, BAUMGARTNER S V, JAGER M, et al. Multichannel SAR-GMTI in maritime scenarios with F-SAR and TerraSAR-X sensors[J]. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2015, 8(11): 5052-5067. doi: 10.1109/JSTARS.2015.2438898.
[10]
PERLOVSKY L, ILIN R, DEMING R, et al. Moving target detection and characterization with circular SAR[C]. IEEE Radar Conference, Washington, DC, USA, 2010: 661-666. doi: 10.1109/RADAR.2010.5494540.
[11]
POISSON J-B, ORIOT H M, and TUPIN F. Ground moving target trajectory reconstruction in single-channel circular SAR[J]. IEEE Transactions on Geoscience and Remote Sensing, 2015, 53(4): 1976-1984. doi: 10.1109/TGRS.2014. 2351419.
[12]
DEMING R, BEST M, and FARRELL S. Simultaneous SAR and GMTI using ATI/DPCA[C]. Proceedings of Society of Photo-Optical Instrumentation Engineers, Baltimore, Maryland, USA, 2014, 90930U-90930U-19. doi: 10.1117/12. 2058264.
[13]
ZHAO Yue, LIN Yun, HONG Wen, et al. Adaptive imaging of anisotropic target based on circular-SAR[J]. Electronics Letters, 2016, 52(16): 1406-1408. doi: 10.1049/el.2016.1764.
[14]
JAO J K. Theory of synthetic aperture radar imaging of a moving target[J]. IEEE Transactions on Geoscience and Remote Sensing, 1991, 39(9): 1984-1992. doi: 10.1109/36. 951089.
[15]
SCARBOROUG S M, CASTEEL Jr C H, GORHAM L, et al. A challenge problem for SAR-based GMTI in urban environments[C]. Proceedings of Society of Photo-Optical Instrumentation Engineers, Orlando, Florida, USA, 2009: 73370G-73370G-10. doi: 10.1117/12.823461.
