基于方位波数域聚束模式PFA的运动补偿新方法研究

杨磊; 唐禹; 孙光才; 邢孟道; 保铮

doi:10.3724/SP.J.1146.2009.01423

基于方位波数域聚束模式PFA的运动补偿新方法研究

doi: 10.3724/SP.J.1146.2009.01423

基金项目:

国家部委基金资助课题

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出版历程
- 收稿日期: 2009-11-02
- 修回日期: 2010-03-03
- 刊出日期: 2010-11-19

Study on Azimuth Wavenumber Domain Spotlight Mode Motion Compensation Based on PFA

摘要

摘要: 该文在对聚束模式SAR数据进行极坐标算法(PFA)形式成像的过程中，通过研究载机运动误差对散射点方位向波数表达式的影响，给出了一种基于方位波数域进行运动误差估计及相关补偿的新方法。该方法首先应用距离匹配滤波和方位dechirp实现对原始数据的2维调频率去斜处理，同时经过距离FFT和极坐标算法的操作将原来极坐标下的数据重采样到直角坐标系下的2维波数域，最后对数据进行距离和方位的分块误差估计及补偿。这种方法能很好地针对运动误差造成的方位二次及高次误差相位项进行精确补偿，同时也能处理误差相位的空变性问题，因此可以获得相对传统时域补偿方法更好的图像聚焦效果。实测数据的处理和分析，验证了该文所述方法的有效性，证明了与传统时域运动补偿方法相比的优越性。
- 聚束式合成孔径雷达 /
- 运动补偿 /
- 波数域 /
- 极坐标算法
Abstract: In this paper, the motion compensation of spotlight mode SAR data processing is studied with Polar Format Algorithm (PFA). A new approach for motion error estimation and compensation in azimuth wavenumber domain is proposed. The framework applies range matched filtering and azimuth dechirp processing to obtain the two dimensional wavenumber data support. First, range compression via fast Fourier transform and PFA interpolation to transform the polar coordinate support to rectangular one is performed. Then the error phase is estimated and compensated in sub-apertures respectively. This framework can both compensate the second or high order motion error accurately, and solve the spatial-variant errors. Compared with the traditional time domain motion compensation, the proposal can achieve better performance for focusing synthetic aperture radar imagery. Experiment?with real data is done to verify the effectiveness and advantage of the proposal.
- Spotlight SAR /
- Motion compensation /
- Wavenumber domain /
- Polar Format Algorithm (PFA)

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Eineder M, Adam N, and Brcic R. High bandwidth spotlight SAR interferometry with TerraSAR-X[C]. IGARSS 2008, Boston, USA, 2008, 2: II113-II116.[2]Tan Wei-xian, Li Dao-jing, and Hong Wen. Airborne spotlight SAR imaging with super high resolution based on back-projection and autofocus algorithm. IGARSS 2008, Boston, USA, 2008, 4: IV1300-IV1303.[3]Carrara G.[J].Goodman S, and Majewski M. Spotlight Synthetic Aperture Radar Signal Processing Algorithms[M]. Boston London: Artech House.1995,:-[4]Carrara G, Goodman S, and Ricoy M A. New algorithms for widefield SAR image formation[C]. Proc. IEEE Radar Conference 2004, Philadelphia, USA, 2004: 38-43.[5]Tang Yu, Xing Meng-dao, and Bao Zheng. The polar format imaging algorithm based on double Chirp-Z transforms[J].IEEE Geoscience Remote Sensing Letters.2008, 5(4):610-614[6]Zhu Dai-yin, Ye Shao-hua, and Zhu Zhao-da. Polar format algorithm using chirp scaling for spotlight SAR image formation[J].IEEE Transactions on Aerospace and Electronic Systems.2008, 44(4):1433-1448[7]保铮, 邢孟道, 王彤. 雷达成像技术[M]. 北京: 电子工业出版社, 2005, 第7章.[8]Fornaro G. Trajectory deviation in airborne SAR: analysis and compensation[J].IEEE Transactions on Aerospace and Electronic Systems.1999, 35(3):997-1009[9]Prats P, Reigber A, and Mallorqui J J. Topography- dependent motion compensation for repeat-pass interferometric SAR systems[J].IEEE Transactions on Geoscience Remote Sensing.2005, 2(2):206-210[10]Reigber A, Aliviazatos E, and Potsis A. Extended wavenumber-domain synthetic aperture radar focusing with integrated motion compensation[J].IEE Proceedings. Radar Sonar and Navigation.2006, 153(3):301-310[11]Fu Wen-xian, Li Shao-hong, and Hong Wen. Motion compensation for soptlight SAR mode imaging[C]. 2001 CIE International Conference on Radar, Beijing, China, 2001: 938-942.[12]Yuan Y, Sun J, and Mao S. PFA algorithm for airborne spotlight SAR imaging with nonideal motions[J].IEE Proceedings Radar Sonar and Navigation.2002, 149(4):174-182[13]Xing Meng-dao, Jiang Xiu-wei, Wu Ren-biao, Zhou Feng, and Bao Zheng. Motion compensation for UAV SAR based on raw radar data[J].IEEE Transactions on Geoscience Remote Sensing.2009, 47(8-2):2870-2883[14]李刚，许稼，彭应宁，夏香根. 一种稳健的机载雷达杂波多普勒参数估计方法[J].电子与信息学报.2007, 29(12):2867-2870浏览Li Gang, Xu Jia, Peng Ying-ning, and Xia Xiang-gen. A robust algorithm of doppler parameters estimation for airborne radar[J].Journal of Electronics Information Technology.2007, 29(12):2867-2870[15]刘碧丹，韩松，王岩飞. 图像幅度和值最小化自聚焦算法[J].电子与信息学报.2009, 31(4):768-771浏览Liu Bi-dan, Han Song, and Wang Yan-fei. Minimizing sum of image amplitudes autofocus algorithm[J].Journal of Electronics Information Technology.2009, 31(4):768-771[16]邢孟道, 保铮. 基于运动参数估计的SAR成像[J]. 电子学报, 2001, 29(12): 1824-1828.Xing Meng-dao, and Bao Zheng. Motion parameter estimation based SAR imaging[J]. Acta Electronic Sinica, 2001, 29(12): 1824-1828.

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