Arc Synthetic Aperture Radar (Arc-SAR) is a new operation-mode radar that is suitable for wide observation in certain areas. With its high resolution, wide observation area, and short repetition visit period, Arc-SAR is widely used in monitoring deformation measurements, landslides, and natural hazards. Because of the special movement of Arc-SAR, the BackproPagation Algorithm (BPA) is widely used in its image processing. Here, we propose a novel two-dimensional frequency domain algorithm to process an Arc-SAR signal. First, we derive a signal model of Arc-SAR based on that of frequency-modulated continuous-wave radar. Next, because the length of the arm is far shorter than the distance of the antenna to the target, the signal can be processed in a 2D frequency domain. Finally, we analyze the error of the frequency method used. This algorithm has the advantages of high computation speed and accuracy. The simulation and experimental data results confirm the effectiveness and validity of the proposed method.
路 满, 宋红军, 罗运华. 基于调频连续波信号的圆弧式合成孔径雷达成像方法[J]. 雷达学报, 2016, 5(4): 425-433.
Lu Matt, Song Hongjun, Luo Yunhua. Imaging Algorithm for Arc Synthetic Aperture Radar Using Frequency Modulated Continuous Wave. JOURNAL OF RADARS, 2016, 5(4): 425-433.
Nico G, Leva D, Antonello G, et al.. Ground-based SAR interferometry for terrain mapping: theory and sensitivity analysis[J]. IEEE Transactions on Geoscience and Remote Sensing, 2004, 42(6): 1344-1350.
[2]
Leva D, Nico G, Tarchi D, et al.. Temporal analysis of a landslide by means of a ground-based SAR Interferometer[J]. IEEE Transactions on Geoscience and Remote Sensing, 2003, 41(4): 745-752.
[3]
Luzi G, Pieraccini M, Mecatti D, et al.. Ground-based radar interferometry for landslides monitoring: atmospheric and instrumental decorrelation sources on experimental data[J]. IEEE Transactions on Geoscience and Remote Sensing, 2004, 42(11): 2454-2466.
[4]
Monserrat O, Crosetto M, and Luzi G. A review of ground-based SAR interfer-ometry for deformation measurement[J]. ISPRS Journal of Photogrammetry and Remote Sensing, 2014, 93: 40-48.
[5]
Klausing H. Feasibility of a Synthetic Aperture Radar with Rotating Antennas (ROSAR)[C]. 19 th European Microwave Conference, London, 1989: 287-299.
[6]
Jun Z. The static small object detection based on ground-based arc SAR[C]. 2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 2012, 4: 1-4. doi: 10.1109/ICMMT.2012.6230315.
[7]
Meta A. Signal processing of FMCW synthetic aperture radar data[D]. [Ph.D. dissertation], University of Technology, 2006: 7-11.
[8]
刘悦. FMCW SAR新体制及信号处理方法研究[D]. [博士论文], 中国科学院大学, 2012: 11-24. Liu Y. Study on FMCW SAR-Configurations and Signal Processing[D]. [Ph.D. dissertation], University of Chinese Academy of Sciences, 2012: 11-24.
[9]
Luo Y, Song H, Wang R, et al.. Arc FMCW SAR and applications in ground monitoring[J]. IEEE Transactions on Geoscience and Remote Sensing, 2014, 52(9): 5989-5998.
[10]
Lee H, Lee J H, Kim K E, et al.. Development of a truck-mounted Arc-Scanning Synthetic Aperture Radar[J]. IEEE Transactions on Geoscience and Remote Sensing, 2014, 52(5): 2773-2779.
[11]
曾操, 梁思嘉, 王威, 等. 基于频率步进信号的旋转式合成孔径雷达成像方法[J]. 雷达学报, 2014, 3(4): 401-408. Zeng Cao, Liang Si-jia, Wang Wei, et al.. Imaging algorithm for rotor synthetic aperture radar using stepped-frequency waveform[J]. Journal of Radars, 2014, 3(4): 401-408.
[12]
李东, 廖桂生, 王威, 等. 直升机载调频连续波旋转式SAR信号分析与成像算法研究[J]. 电子与信息学报, 2013, 35(10): 2460-2466. Li Dong, Liao Guisheng, Wang Wei, et al.. Performance analysis and image formation algorithm for helicopter-borne rotating synthetic aperture radar using frequency modulated continue waveform[J]. Journal of Electronics & Information Technology, 2013, 35(10): 2460-2466.
[13]
De Wit J, Meta A, and Hoogeboom P. Modified range-Doppler processing for FM-CW synthetic aperture radar[J]. IEEE Geoscience and Remote Sensing Letters, 2006, 3(1): 83-87.
[14]
Meta A, Hoogeboom P, and Ligthart L. Signal processing for FMCW SAR[J]. IEEE Transactions on Geoscience and Remote Sensing, 2007, 45(11): 3519-3532.
[15]
Carrara W, Goodman R, and Majewski R. Spotlight Synthetic Aperture Radar: Signal Processing Algorithms[M]. Boston, MA: Artech House, 1995: 501-506.
[16]
Carrara W, Goodman R, and Majewski R. Spotlight Synthetic Aperture Radar: Signal Processing Algorithms[M]. Boston, MA: Artech House, 1995: 423-426, 456-464.
[17]
Ian G C and Frank H W. Digital Processing of Synthetic Aperture Radar Data: Algorithms and Implementation[M].Boston, MA, Artech House, 2005: 473-476.
