Volume 33 Issue 01
Jan.  2007
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Wang Pengbo, Zhou Yinqing, Chen Jie, et al. Imaging algorithm for high-resolution space-borne spotlight SAR data based on two dimension deramp processing[J]. Journal of Beijing University of Aeronautics and Astronautics, 2007, 33(01): 72-75. (in Chinese)
Citation: Wang Pengbo, Zhou Yinqing, Chen Jie, et al. Imaging algorithm for high-resolution space-borne spotlight SAR data based on two dimension deramp processing[J]. Journal of Beijing University of Aeronautics and Astronautics, 2007, 33(01): 72-75. (in Chinese)

Imaging algorithm for high-resolution space-borne spotlight SAR data based on two dimension deramp processing

  • Received Date: 13 Jan 2006
  • Publish Date: 31 Jan 2007
  • Reduced the data rate is one of the difficulties in high-resolution space-born e spotlight synthetic aperture radar (SAR). Based on two-step focusing algorith m and chirp scaling(CS) algorithm, two dimension deramp chirp scaling(TDDCS) alg orithm for processing high-resolution space-borne spotlight SAR data was prese nted. The algorithm starts with raw data dechirped in range. First, the azimuth s pectral folding phenomenon is overcome by using azimuth deramp processing, and the chirp signal is recovered by using range deramp processing. Second, the prec ise range cell migration correction is achieved by chirp scaling processing and phase compensation. Lastly, the azimuth compression is performed by match filter , and the image is received. Based on the squinted equivalent range model, the c omplete derivation of the algorithm was presented and the realizing approach was given. The computer simulation shows the validity of the algorithm.

     

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  • [1] Carrara W G, Goodman R S, Majewski R M. Spotlight synthe tic aperture radar[M]. Boston:Artech House, 1995 [2] 王国栋,周荫清,李春升. 高分辨率星载聚束SAR的Deramp Chirp Scaling 算法[J]. 电子学报, 2003,31(12):1784-1789 Wang Guodong, Zhou Yinqing, Li Chunsheng. A deramp chirp scaling algorithm for h igh-resolution spaceborne spotlight SAR imaging[J]. Acta Electronic Sinica, 2 003, 31(12):1784-1789(in Chinese) [3] Mittermayer J, Moreiro A, Loffeld O. Spotlight SAR data processin g using the frequency scaling algorithm[J]. IEEE Trans on Geosci Remote Sensin g, 1999, 37(5):2198-2214 [4] Lanari R, Fornaro G, Sansosti E. Spotlight SAR data focusing based on a t wo-step processing approach[J]. IEEE Trans on Geosci Remote Sensing, 2001,3 9(9):1993-2004 [5] Moreira A, Huang Y. Airborne SAR processing of highly squinted dat a using a chirp scaling approach with integrated motion compensation [J]. IEEE Trans on Geosci Remote Sensing, 1994, 32(5):1029-1040 [6] 黄岩,李春升,陈杰,等.高分辨率聚束SAR改进Chirp Scaling成像算法[J]. 电子学报, 2000, 28(3):35-38 Huang Yan, Li Chunsheng, Chen Jie, et al. Refined chirp scaling algorithm for high resolution spaceborne SAR imaging[J]. Acta Electronic Sinica,2000,28(3):3 5-38(in Chinese)
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