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一種基于極坐標(biāo)格式算法的高分辨SAR成像自聚焦算法

曾樂(lè)天 梁毅 邢孟道

曾樂(lè)天, 梁毅, 邢孟道. 一種基于極坐標(biāo)格式算法的高分辨SAR成像自聚焦算法[J]. 電子與信息學(xué)報(bào), 2015, 37(6): 1409-1415. doi: 10.11999/JEIT141131
引用本文: 曾樂(lè)天, 梁毅, 邢孟道. 一種基于極坐標(biāo)格式算法的高分辨SAR成像自聚焦算法[J]. 電子與信息學(xué)報(bào), 2015, 37(6): 1409-1415. doi: 10.11999/JEIT141131
Zeng Le-tian, Liang Yi, Xing Meng-dao. Autofocus Algorithm of High Resolution SAR Based on Polar Format Algorithm Processing[J]. Journal of Electronics & Information Technology, 2015, 37(6): 1409-1415. doi: 10.11999/JEIT141131
Citation: Zeng Le-tian, Liang Yi, Xing Meng-dao. Autofocus Algorithm of High Resolution SAR Based on Polar Format Algorithm Processing[J]. Journal of Electronics & Information Technology, 2015, 37(6): 1409-1415. doi: 10.11999/JEIT141131

一種基于極坐標(biāo)格式算法的高分辨SAR成像自聚焦算法

doi: 10.11999/JEIT141131
基金項(xiàng)目: 

中央高?;究蒲袠I(yè)務(wù)費(fèi)專(zhuān)項(xiàng)資金(K5051302046)和國(guó)家自然科學(xué)基金優(yōu)秀青年基金(61222108)資助課題

Autofocus Algorithm of High Resolution SAR Based on Polar Format Algorithm Processing

  • 摘要: 針對(duì)機(jī)載聚束合成孔徑雷達(dá)(SAR)慣導(dǎo)精度無(wú)法滿(mǎn)足高分辨SAR成像的問(wèn)題,該文提出了一種結(jié)合極坐標(biāo)格式算法(PFA)的自聚焦算法,即由粗到精的混合多階段參數(shù)化最小熵(Hybrid Multistage Parameterized Minimum Entropy, HMPME)距離單元徙動(dòng)校正方法和基于圖像對(duì)比度增強(qiáng)(Contrast Enhancement, CE)的變步長(zhǎng)迭代相位誤差校正方法。該自聚焦算法可以直接嵌入到PFA處理中,精確地補(bǔ)償了慣導(dǎo)測(cè)量精度不足引起的越距離單元徙動(dòng)(Range Cell Migration, RCM)和相位誤差,且對(duì)于低對(duì)比度、低信噪比場(chǎng)景數(shù)據(jù)有良好的聚焦性能。最后,利用仿真實(shí)驗(yàn)和實(shí)測(cè)機(jī)載聚束SAR數(shù)據(jù)驗(yàn)證了所提算法的有效性。
  • 張磊. 高分辨SAR/ISAR成像及誤差補(bǔ)償技術(shù)研究[D]. [博士論文], 西安電子科技大學(xué), 2012.
    Zhang Lei. Study on high resolution SAR/ISAR imaging and error correction[D]. [Ph.D. dissertation], Xidian University, 2012.
    Yang Lei, Xing Meng-dao, Wang Yong, et al.. Compensation for the NsRCM and phase error after polar format resampling for airborne spotlight SAR raw data of high resolution[J]. IEEE Geoscience and Remote Sensing Letters, 2013, 10(1): 165-169.
    Carrara G, Goodman S, and Majewski M. Spotlight Synthetic Aperture Radar: Signal Processing Algorithm[M]. Boston, MA: Artech House, 1995: 200-244.
    Xu Gang, Xing Meng-dao, Zhang Lei, et al.. Robust autofocusing approach for highly squinted SAR imagery using the extended wavenumber algorithm[J]. IEEE Transactions on Geoscience and Remote Sensing, 2013, 51(10): 5031-5046.
    黃大榮, 張磊, 邢孟道, 等. 基于加權(quán)最大范數(shù)的SAR自聚焦方法[J].?電子與信息學(xué)報(bào),?2014,?36(1):?202-208.
    Huang Da-rong, Zhang Lei, Xing Meng-dao, et al.. A weighted maximize norm method for SAR autofocus[J]. Journal of Electronics Information Technology, 2014, 36(1): 202-208.
    Wahl 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, 30(3): 827-835.
    Ye Wei, Yeo T S, and Bao Zheng. Weighted least-squares estimation of phase errors for SAR/ISAR autofocus[J]. IEEE Transactions on Geoscience and Remote Sensing, 1999, 37(5): 2487-2494.
    Xiong Tao, Xing Meng-dao, Wang Yong, et al.. Minimum- entropy-based autofocus algorithm for SAR data using Chebyshev approximation and method of series reversion, and its implementation in a data processor[J]. IEEE Transactions on Geoscience and Remote Sensing, 2014, 52(3): 1719-1728.
    Gao Yang, Yu Wei-dong, Liu Ya-bo, et al.. Sharpness-based autofocus for stripmap SAR using an adaptive-order polynomial model[J]. IEEE Geoscience and Remote Sensing Letters, 2014, 11(6): 1086-1090.
    Doerry A W. Autofocus correction of excessive migration in synthetic aperture radar images[R]. Sandia Laboratory, 2004.
    Thomas K J and Alaa K A. Monotonic iterative algorithm for minimum-entropy autofocus[C]. IEEE International Conference on Image Processing, Atlanta, USA, 2006: 645-648.
    Josse K. Image reconstruction and restoration using constrained optimization algorithms[D]. [Ph.D. dissertation], Purdue University, 1996.
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出版歷程
  • 收稿日期:  2014-08-27
  • 修回日期:  2014-12-08
  • 刊出日期:  2015-06-19

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