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快速后向投影合成孔径雷达成像的自聚焦方法 被引量：8

Autofocusing the synthetic aperture radar imagery by the fast back-projection algorithm
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摘要 针对机载合成孔径雷达(SAR)的定位和惯导精度不足的问题,提出了一种结合时域快速后向投影(FBP)成像算法的多孔径图像偏移(MAMD)自聚焦算法.该MAMD算法与FBP处理流程完全相容,有效保持了FBP成像处理的高精度和高效率性能.通过该算法有效处理系统定位精度不足导致的FBP成像聚焦下降问题.利用实测机载SAR数据验证了所提算法的有效性. Time-domain Fast Back-Projection （FBP） is an accurate and efficient solver to generate high- resolution Synthetic Aperture Radar （SAR） images. However, motion errors seriously degrade the performance of the FBP image when the accuracy of the position system does not reach the wavelength level. In this paper, we propose a novel multi-aperture map drift （MAMD） algorithm, which is implemented within the FBP iterations. The autofocus processing is realized by estimating the shift of sub- aperture images and it keeps the high accuracy of the FBP algorithm. Experiments by using real airborne SAR data validate the effectiveness of the proposed algorithm.
作者 张磊 李浩林 邢孟道 保铮
机构地区 西安电子科技大学雷达信号处理国家重点实验室
出处 《西安电子科技大学学报》 EI CAS CSCD 北大核心 2014年第1期69-74,共6页 Journal of Xidian University
基金 国家自然科学基金资助项目(61301280) 中央高校基本科研业务费资助项目(72135855)
关键词 合成孔径雷达 快速后向投影 自聚焦 运动补偿 synthetic aperture radar（SAR） back-projection fast back-projection autofocus motion compensation
分类号 TN957 [电子电信—信号与信息处理]
  • 相关文献

参考文献16

  • 1Carrara W G, Goodman R S, Ricoy M A. New Algorithms for Widefield SAR Image Formation[C]//IEEE Radar Conference. Piseataway: IEEE, 2004: 38-43.
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二级参考文献13

  • 1邢孟道,保铮,郑义明.用整体最优准则实现ISAR成像的包络对齐[J].电子学报,2001,29(z1):1807-1811. 被引量：30
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  • 6Ye Wei, Yeo T S, Bao Zheng. Weighted Least-Squares Estimation of Phase Errors for SAR/ISAR Autofocus [J]. IEEE Trans on Geoscience Remote Sensing, 1999, 37(5) : 2487-2494.
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  • 10李军,邢孟道,张磊,吴顺君.一种高分辨的稀疏孔径ISAR成像方法[J].西安电子科技大学学报,2010,37(3):441-446. 被引量：27

共引文献18

同被引文献77

  • 1周希娃,李凉海,张振华,于勇.高动态运动平台85°大前斜视SAR成像算法研究[J].遥测遥控,2013,34(4):12-17. 被引量：1
  • 2阳凡林,吴自银,独知行,金翔龙.多波束声纳和侧扫声纳数字信息的配准及融合[J].武汉大学学报（信息科学版）,2006,31(8):740-743. 被引量：19
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  • 6Ulander L M H, Hellsten H, Stenstrbm G. Synthetic-aperture Radar Processing Using Fast Factorized Back-projection [J]. IEEE Transactions on Aerospace and Electronic Systems, 2003, 39(3) : 760-776.
  • 7Jakowatz C V Jr, Wahl D E. Considerations for Autofocus of Spotlight-mode SAR Imagery Created Using a Beamforming Algorithm [C] //Proceedings of SPIE: 7337. Bellingham: SPIE, 2008 : 73370A.
  • 8Hellsten H, Dammert P, .Ahlander A. Autofocus in Fast Factorized Backprojection for Processing of SAR Images When Geometry Parameters Are Unknown [C]//Proceedings of the IEEE Radar Conference. Piscataway: IEEE, 2010: 603- 608.
  • 9Ash J N. An Autofocus Method for Backprojection Imagery in Synthetic Aperture Radar [J]. IEEE Geoscience and Remote Sensing Letters, 2012, 9(1): 104-108.
  • 10Wahl D E, Eichel P H, Ghiglia D C, et al. Phase Gradient Autofocus--a Robust Tool for High Resolution Phase Correction [J]. IEEE Transactions on Aerospace and Electronic Systems, 1994, 80(3): 827-835.

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二级引证文献22

西安电子科技大学学报
2014年 第1期

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