| 利用电磁仿真数据研究ISAR运动补偿和成像 |
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| 引用本文： | 周建江,朱兆达,邬小青.利用电磁仿真数据研究ISAR运动补偿和成像[J].南京航空航天大学学报,1992(6). |
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| 作者姓名： | 周建江 朱兆达 邬小青 |
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| 作者单位： | 南京航空学院电子工程系
(周建江，朱兆达)，南京航空学院电子工程系(邬小青) |
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| 摘 要： | 本文利用板块法对运动目标进行电磁仿真,根据Stratton-Chu积分,通过目标CAD造形和表面板块生成,每一板块元与目标实际表面之间的最大误差不得大于入射雷达波波长的十六分之一,从而将目标的三维曲面矢量电磁散射积分简化为每一板块面元上的二维平面矢量积分之和,获得静止目标的散射场,然后通过目标运动轨迹模拟,考虑由于目标的运动而引起的雷达回波相位的变化,实现运动目标的电磁仿真。利用这种电磁仿真方法模拟产生64×128个回波数据,用频域法进行距离对准,用最大似然方法进行相位补偿,目标轨迹运动引起的距离变化用时间的二次函数拟合,研究了用X波段雷达对一架匀速直线飞行飞机的ISAR运动补偿和成像。
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| 关 键 词： | 合成孔径雷达 电磁波散射 最大似然法 雷达成像 板块法 |
Research on ISAR Motion Compensation and Imaging by Modeling Electromagnetic Data |
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| Zhou Jianjiang Zhu Zhaoda Wu Xiaoqing.Research on ISAR Motion Compensation and Imaging by Modeling Electromagnetic Data[J].Journal of Nanjing University of Aeronautics & Astronautics,1992(6). |
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| Authors: | Zhou Jianjiang Zhu Zhaoda Wu Xiaoqing |
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| Institution: | Department of Electronic Engineering |
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| Abstract: | This paper studies the electromagnetic simulation of a moving target by means of the panel method. The integration equation of the far-zone electromagnetic scattering of a target is simplified by breaking the target shape up into panels after the CAD of the target configuration is finished,and then the scattering field is obtained for a stationary target. Taking account for the moving orbit of the target, the modeling electromagnetic data of the moving target is established. Using these data,the ISAR motion compensation and imaging of a plane,in straight flight with a constant speed and illuminated by an X-band radar,are accomplished by means of the maximum likelihood method. |
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| Keywords: | synthetic aperture radar (SAR) electromagnetic wave scattering maximum likelihood estimations radar imaging panel method |
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