| 基于脉冲积累的SAR实时聚焦算法 |
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| 作者姓名： | 张峰会 王岩飞 |
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| 作者单位： | 1. 中国科学院电子学研究所, 北京 100190;
2. 中国科学院研究生院, 北京 100190;
3. 上海航天技术研究院804研究所, 上海 200101 |
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| 摘 要： | 在实际的SAR场景中,由于载机平台运动的不规律会引入相位误差,这将导致SAR图像出现模糊,甚至不能形成图像,因此需要准确地估计和补偿相位误差.提出一种较好的SAR相位历史估计算法,在方位向应用延时自相关方法进行准确的相位估计,由此实现SAR的准确聚焦成像.该相位估计方法具有较高的计算效率,非常适合于实时SAR系统.利用对实际SAR数据的聚焦处理证明了该方法的有效性.
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| 关 键 词： | 相位误差 延时消去法 脉冲积累 实时合成孔径雷达 自聚焦 |
| 收稿时间： | 2010-06-07 |
| 修稿时间： | 2011-03-16 |
An improved focusing method for real time SAR |
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| Authors: | ZHANG Feng-Hui WANG Yan-Fei |
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| Institution: | 1. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
2. Graduate University, Chinese Academy of Sciences, Beijing 100190, China;
3. Institute of 804, Shanghai Aerospace Technology Academy, Shanghai 200101, China |
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| Abstract: | For practical SAR systems, the motion errors of radar platform lead to the azimuth phase history errors which lead to defocus images. We propose a modified autofocus method which applies the delay and remove algorithm for more effectively estimating the real phase history based on azimuth data. With this method a better focused image is achieved. The algorithm is efficient for real-time SAR system. The focus processing results of SAR measured data show that the proposed method is effective. |
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| Keywords: | phase error delay and remove algorithm pulse integral real time SAR autofocus auto focus |
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