基于频域的低频UWB SAR极化校准
Polarimetric Calibration for Low Frequency UWB SAR Based on the Frequency Domain
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摘要: 多极化，低频超宽带(Ultra Wide Band, UWB)合成孔径雷达(Synthetic Aperture Radar, SAR)是雷达技术未来发展的一个重要方向。系统的低频特性，UWB特性和大处理角特性使得常规SAR极化校准不再适用。该文基于多极化低频UWB SAR频域处理模型，考虑了极化校准中定标体的低频超宽带电磁散射特性的问题，给出了极化校准方法。计算机仿真验证了该方法的有效性。Abstract: Multi-polarization, low frequency Ultra Wide Band Synthetic Aperture Radar (UWB SAR) is one of the most important aspects of the radar technology. The low frequency, UWB and large processing angle result that the polarimetric calibration for regular SAR system cannot be used. In this paper, based on the frequency-domain processing model of the multi-polarization, low frequency UWB SAR system, with the consideration of the low frequency UWB electromagnetic scattering characteristics of the calibrators, the polarimetric calibration method is proposed. The computer simulation is used to validate the method.
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Freeman A. SAR calibration: an overview. IEEE Trans. on GRS, 1992, 30(6): 1107.1121.[2]Zou Kun, Liang Diannong. Radiometric calibration of low frequency UWB SAR images. EUSAR, Ulm, Germany, 2004: 917.920.[3]邹鲲, 梁甸农, 低频UWB SAR 图像的辐射校准. 系统工程与电子技术, 2005, 27(1): 25.27.[4]Soumekh M. Reconnaissance with ultra wideband UHF synthetic aperture radar[J].IEEE Sig. Process. Magazine.1995, 12(4):21-[5]Geng N, Ressler M A, Carin L. Wide-band VHF scattering from a trihedral reflector situated above a lossy dispersive halfspace, IEEE Trans. on GRS, 1999, 37(5): 26092617. .[6]Rao S.M, Wilton D R, Glisson A W. Electromagnetic scattering by surfaces of arbitrary shape. IEEE Trans. on AP, 1982, 30(5): 409.418.[7]Cockrell C R, Beck F B. Asymptotic Waveform Evaluation (AWE) technique for frequency domain electromagnetic analysis. NASA Technical Memorandum 110292. 1996.[8]邹鲲, 梁甸农, 低频UWB SAR天线方向图的校准, 雷达科学与技术, 2004, l2(3): 188.192. -
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