In recent years, there have been many studies on Synthetic Aperture Radar (SAR), and High- Resolution and Wide-Swath (HRWS) imaging has attracted increasing attention. High-resolution images of a stationary scene enabling the detection of moving targets can be provided by an SAR system combined with Ground Moving Target Indication (GMTI), which is widely used in many civilian applications. A multichannel in azimuth HRWS SAR system has been presented to effectively deal with conflicts between high resolution and low Pulse Repetition Frequency (PRF), which are encountered during HRWS SAR imaging. Because the spatial degrees of freedom in the azimuth can be employed to suppress a clutter, the multichannel configuration offers significant potential for GMTI capability. In this study, a new clutter suppression and moving target imaging method is proposed, which can be operated in an HRWS SAR system without the need for a separate high PRF operation mode.
邢孟道, 孙光才, 李学仕. 用于高分辨率宽测绘带SAR系统的SAR/GMTI处理方法研究[J]. 雷达学报, 2015, 4(4): 375-385.
Xing Meng-dao, Sun Guang-cai, Li Xue-shi. Study on SAR/GMTI Processing for High-resolution Wide-swath SAR System. JOURNAL OF RADARS, 2015, 4(4): 375-385.
Gierull C H and Sikaneta I C. Raw data based two-aperture SAR ground moving target indication[C]. Proceedings 2003 IEEE IGARSS'03, Toulouse, France, 2003, 2: 1032-1034.
[2]
Wang H S C. Mainlobe clutter cancellation by DPCA for space-based Radars[C]. Aerospace Applications Conference, Creasted Butte, CO, USA, 1991: 124-128.
[3]
Shen Chiu. Application of fractional Fourier transform to moving target indication via along-track interferometry[J]. EURASIP Journal on Applied Signal Processing, 2005(20): 3293-3303.
[4]
Breit H, Eineder M, Holzner J, et al.. Traffic monitoring using SRTM along-track interferometry[C]. Proceedings 2003 IEEE IGARSS'03, 2003, 2: 1187-1189.
[5]
Breit H and Eineder M. Traffic monitoring using SRTM along-track interometry[C]. IGARSS 2003, France, 2003: 1187-1189.
[6]
Klemm R. Introduction to space-time adaptive processing[J]. Electronics & Communication Engineering Journal, 1999, 11(1): 5-12.
[7]
Zhang S, Xing M, Xia X, et al.. A novel moving target imaging algorithm for multi-channel in azimuth HRWS SAR based on local maximum-likelihood minimum entropy in range frequency[J]. IEEE Transactions on Geoscience and Remote Sensing, 2014, 52(11): 5333-5347.
[8]
Xia X G. Discrete chirp-Fourier transform and its application to chirp rate[J]. IEEE Transactions on Signal Processing, 2000, 48(11): 3122-3133.
[9]
Madsen S N. Estimating the Doppler centroid of SAR data[J]. IEEE Transactions on Aerospace and Electronic Systems, 1989, 25(2): 134-140.
[10]
Cumming I G, Kavanagh P F, Ito M R, et al.. Resolving the Doppler ambiguity for spaceborne synthetic aperture radar[C]. Proceedings 2003 IEEE IGARSS'03, Zurich, Switzerland, 1986: 1639-1643.
[11]
Zhang S, Xing M, Xia X, et al.. Multi-channel HRWS SAR imaging based on range-variant channel-calibration and multi-Doppler-direction restriction ambiguity suppression[J]. IEEE Transactions on Geoscience Remote Sensing, 2014, 52(9): 4306-4326.
[12]
Delphine C and Ishuwa S. “Optimum GMTI processing for space-based SAR/GMTI systems-Theoretical derivation”[C]. 2010 8th European Conference on Synthetic Aperture Radar, Aachen, Germany, 2010: 390-393.
[13]
Cerutti-Maori D and Sikaneta I. Optimum GMTI processing for spacebased SAR/GMTI systems-Simulation results[C]. 2010 8th European Conference on Synthetic Aperture Radar, Aachen, Aachen, Germany, 2010: 653-656.
[14]
Cerutti-Maori D, Gierull C H, and Ender J H G. Optimum SAR/GMTI processing and its application to the radar satellite RADARSAT-2 for traffic monitoring[J]. IEEE Transactions on Geoscience and Remote Sensing, 2012, 50(10): 3868-3881.