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基于变量解耦的俯冲加速段弹载SAR大场景成像算法

江淮 赵惠昌 汉敏 张淑宁

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Citation:

基于变量解耦的俯冲加速段弹载SAR大场景成像算法

江淮, 赵惠昌, 汉敏, 张淑宁

An imaging algorithm for missile-borne SAR with downward movement based on variable decoupling

Jiang Huai, Zhao Hui-Chang, Han Min, Zhang Shu-Ning
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  • 俯冲加速阶段导弹运动状态复杂,成像范围需求大,回波处理困难的特点使得传统的成像算法难以运用. 针对这一问题,本文首先建立了精确的斜距几何和回波模型,并在分析二维频谱的基础上,提出了一种基于变量解耦下的非线性变标算法,有效的补偿了随场景纵向和横向的多普勒调频率,改善了方位聚焦质量和位置的正确性,提高成像质量的同时简化了后期图像几何校正操作. 多个散射点的仿真数据和结果表明了算法的有效性.
    The ordinary SAR imaging algorithms are inapplicable to missile-bo-rne SAR due to the high speed dive and high-squint of missile. Aiming at this problem, this paper firstly sets up the model of echo and analyses of two-dimensional spectrum. By using azimuth nonlinear chirp scaling (NLCS) based on variable decoupling, an imaging algorithm for missile-borne SAR is proposed.It can effectively compensate the scene with longitudinal and transverse Doppler shift and improve the focusing quality while it can also simplify the geometric image correction operation. Simulation results are provided to confirm the effectiveness of the proposed algorithm.
    • 基金项目: 国家自然科学基金(批准号:61171168,60702016)资助的课题.
    • Funds: Project supported by the National Natural Science Foundation of China(Grant Nos. 61171168, 60702016).
    [1]

    Chen S, Zhao H C, Zhang S N, Chen Y 2013 Acta Phys. Sin. 62 218406 (in Chinese)[陈思, 赵惠昌, 张淑宁, 陈勇 2013 物理学报62 218406]

    [2]

    Yi Y S 2009 Ph. D. Dissertation(Xi’an: XiDian University) (in Chinese) [易予生2009 博士论文(西安: 电子科技大学)]

    [3]

    Zhou P 2011 Ph. D. Dissertation(Xi’an: XiDian University) (in Chinese) [周鹏2011 博士论文(西安: 电子科技大学)]

    [4]

    Zhou S, Bao M, Zhou P, Xing M D, Bao Z 2011 J. Electron. Inf. Tech. 33 1421(in Chinses) [周松, 包敏, 周鹏, 邢孟道, 保铮2011 电子与信息学报33 1421]

    [5]

    Wang Z, He X D, Tang B 2013 J. Data Acquis. Process. 28 479 (in Chinsess) [王珍, 和小冬, 唐斌2013 数据采集与处理28 479]

    [6]

    Xiao Z Y, Xu H P, Li C S 2013 J. Electron. Inf. Tech. 35 1090 (in Chinse) [肖忠源, 徐华平, 李春升2013 电子与信息学报35 1090]

    [7]

    Wong F H, Cumming I G, Neo Y L 2008 IEEE Trans. Geosci. Remote Sens. 46 2493

    [8]

    Davidson G W, Cumming I G 1996 IEEE Trans. Aerosp. Electro. Syst. 32 121

    [9]

    Milman A S 1993 Int. J. Remote Sens. 14 1965

  • [1]

    Chen S, Zhao H C, Zhang S N, Chen Y 2013 Acta Phys. Sin. 62 218406 (in Chinese)[陈思, 赵惠昌, 张淑宁, 陈勇 2013 物理学报62 218406]

    [2]

    Yi Y S 2009 Ph. D. Dissertation(Xi’an: XiDian University) (in Chinese) [易予生2009 博士论文(西安: 电子科技大学)]

    [3]

    Zhou P 2011 Ph. D. Dissertation(Xi’an: XiDian University) (in Chinese) [周鹏2011 博士论文(西安: 电子科技大学)]

    [4]

    Zhou S, Bao M, Zhou P, Xing M D, Bao Z 2011 J. Electron. Inf. Tech. 33 1421(in Chinses) [周松, 包敏, 周鹏, 邢孟道, 保铮2011 电子与信息学报33 1421]

    [5]

    Wang Z, He X D, Tang B 2013 J. Data Acquis. Process. 28 479 (in Chinsess) [王珍, 和小冬, 唐斌2013 数据采集与处理28 479]

    [6]

    Xiao Z Y, Xu H P, Li C S 2013 J. Electron. Inf. Tech. 35 1090 (in Chinse) [肖忠源, 徐华平, 李春升2013 电子与信息学报35 1090]

    [7]

    Wong F H, Cumming I G, Neo Y L 2008 IEEE Trans. Geosci. Remote Sens. 46 2493

    [8]

    Davidson G W, Cumming I G 1996 IEEE Trans. Aerosp. Electro. Syst. 32 121

    [9]

    Milman A S 1993 Int. J. Remote Sens. 14 1965

计量
  • 文章访问数:  5021
  • PDF下载量:  605
  • 被引次数: 0
出版历程
  • 收稿日期:  2013-11-17
  • 修回日期:  2014-01-01
  • 刊出日期:  2014-04-05

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