| 机载三基线干涉合成孔径雷达的系统参数估计 |
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| 作者姓名： | 马萌 李道京 潘舟浩 杜剑波 |
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| 作者单位： | 1. 中国科学院电子学研究所微波成像技术重点实验室, 北京 100190;
2. 中国科学院大学, 北京 100049;
3. 中国电子科学研究院, 北京 100041 |
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| 基金项目： | 国家自然科学基金(61271422)资助 |
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| 摘 要： | 针对机载刚性三基线干涉合成孔径雷达的应用需求,在存在干涉相位噪声的情况下,研究基于2个地面控制点估计系统基线倾角和干涉相位偏差的问题,分析干涉相位噪声对参数估计精度的影响,提出一种三基线联合参数估计方法.使用牛顿法求解系统参数估计方程,根据不同基线的高程测量精度,对目标函数进行加权处理,并使用不同基线得到的高程差来评价参数估计效果.仿真结果表明,相比于传统的单基线参数估计方法,该方法具有较高的参数估计精度.
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| 关 键 词： | 干涉合成孔径雷达 系统参数估计 机载三基线 |
| 收稿时间： | 2014-12-05 |
| 修稿时间： | 2015-04-24 |
System parameter estimation for airborne interferometric synthetic aperture radar with three-baseline |
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| Authors: | MA Meng LI Daojing PAN Zhouhao DU Jianbo |
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| Institution: | 1. Science and Technology on Microwave Imaging Laboratory, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. China Academy of Electronics and Information Technology, Beijing 100041, China |
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| Abstract: | This work investigated the parameter estimation problem for airborne interferometric synthetic aperture radar with rigid three-baseline. The considered system parameters are baseline orientation angle and interferometric phase offsets. So the least number of ground control points can be reduced to two. The effect of phase noise on the estimation accuracy is analyzed and a novel method called three-baseline union parameter estimation is proposed. The proposed method employed Newton optimal algorithm to solve the nonlinear estimation equations and used weighting process to deal with elevation accuracy difference of each baseline. Elevation difference between any two baselines is used to evaluate the efficiency of parameter estimation method. Simulation results indicate that the proposed method can obtain higher estimation accuracy than the conventional single baseline parameter estimation method. |
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| Keywords: | interferometric synthetic aperture radar system parameter estimation airborne three-baseline |
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