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用SAR原始數(shù)據(jù)對雷達脈沖信號失真的校正

黃立勝,  王貞松,  徐永建

黃立勝, 王貞松, 徐永建. 用SAR原始數(shù)據(jù)對雷達脈沖信號失真的校正[J]. 電子與信息學(xué)報, 2002, 24(11): 1641-1647.
引用本文: 黃立勝, 王貞松, 徐永建. 用SAR原始數(shù)據(jù)對雷達脈沖信號失真的校正[J]. 電子與信息學(xué)報, 2002, 24(11): 1641-1647.
Huang Lisheng, Wang Zhensong, Xu Yongjian. The correction of chirp radar signals based on SAR raw data[J]. Journal of Electronics & Information Technology, 2002, 24(11): 1641-1647.
Citation: Huang Lisheng, Wang Zhensong, Xu Yongjian. The correction of chirp radar signals based on SAR raw data[J]. Journal of Electronics & Information Technology, 2002, 24(11): 1641-1647.

用SAR原始數(shù)據(jù)對雷達脈沖信號失真的校正

The correction of chirp radar signals based on SAR raw data

  • 摘要: 該文提出了一種對雷達發(fā)射脈沖進行相位估計的算法。該算法利用Chirp Scaling原理對SAR信號進行距離遷移校正,但僅在方位向波束銳化,然后利用自聚焦的方法(Map Drift,PGA),在距離向進行自聚焦處理,提取距離向的相位誤差信息。文中分析了影響相位估計精度的各種因素,并在算法中加入了迭代補償方法,仿真結(jié)果驗證了算法的正確性。
    Abstract: This paper introduces an algorithm used in estimation of the phase error of chirp signal. Firstly, the algorithm applies Range Cell Migration Correction (MCRC) to SAR signals with chirp scaling method, and processes on azimuth compression only. Then the phase error of the radar chirp signal is estimated by applying the auto-focus method, for example, Map Drift (MD) or Phase Gradient Algorithm (PGA) to the azimuth processing of signals. Further correction on estimated phase error is applied to discussion of the factors that influent the phase error estimation. The algorithm is proved by computer simulation.
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  • D.A. Ausherman, A. Kozma, J. L. Walker, H. M. Jones, E. C. Poggio, Developments in radar imaging, IEEE Trans. on Aerospace and Electronic Systems, 1984, 20(4), 363-400.[2]P.H. Eichel, D. C. Ghiglia, C. V. Jakowatz, Jr., Speckle processing method for synthetic-aperture-radar phase, Optics Letters, 1989, 14(1), 1-3.[3]P.H. Eichel, C. V. Jakowatz, Phase-gradient algorithm as optimal estimator of phase drivative,Optics Letters, 1989, 14(20), 1101-1103.[4]C.V. Jakowatz, Jr., D. E. Wahl, Eigenvector method for maximum-likehood estimation of phase errors in synthetic-aperture-radar imagery, Optical Society of America, 1993, 10(12), 2539-2545.[5]D.E. Wahl, P. H. Eichel, D. C. Ghiglia, C. V. Jakowatz, Phase gradient autofocus-A robust tool for high resolution SAR phase correction, IEEE Trans. on Aerospace and Electronic Systems,1994, 30(3), 827-834.[6]Terry M. Calloway, Gregory W. Donohoe, Subaperture autofocus for synthetic aperture radar,IEEE Trans. on Aerospace and Electronic Systems, 1994, 30(2), 617-621.[7]R. Keith Raney, H. Runge, Richard Bamler, Ian G. Cumming, Frank H. Wong, Precision SAR processing using chirp scaling, IEEE Trans. on Geoscience and Remote Sensing, 1994, 32(4),786-799.[8]G.W. Davidson, I. G. Cumming, M. R. Ito, A chirp scaling approach processing squint mode SAR data, IEEE Trans. on Aerospace and Electronic Systems, 1996, 32(1), 121-133.
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出版歷程
  • 收稿日期:  2001-04-13
  • 修回日期:  2001-07-18
  • 刊出日期:  2002-11-19

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