| 引用本文: | 陈立福,庞科臣,李银伟,等.双天线干涉SAR系统无控制点场景的高精度参考相位快速估计算法.[J].国防科技大学学报,2017,39(1):159-165.[点击复制] |
| CHEN Lifu,PANG Kechen,LI Yinwei,et al.Fast estimating algorithm for high precision reference phase based on airborne dual-antenna interferometric SAR system[J].Journal of National University of Defense Technology,2017,39(1):159-165[点击复制] |
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| 双天线干涉SAR系统无控制点场景的高精度参考相位快速估计算法 |
| 陈立福1,2, 庞科臣3, 李银伟4, 粟毅1, 袁志辉3, 王静5 |
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(1. 国防科技大学 电子科学与工程学院， 湖南 长沙 410073;2.
2. 长沙理工大学 电气与信息工程学院， 湖南 长沙 410004;3.2. 长沙理工大学 电气与信息工程学院， 湖南 长沙 410004;4.3. 上海无线电设备研究所， 上海 200090;5.4. 西安科技大学 通信与信息工程学院， 陕西 西安 710054)
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| 摘要: |
| 为解决无控制点场景参考相位的快速估计问题，对影响参考相位的因素进行理论分析，给出参考相位与影响因素的解析关系式。结合系统参数进行仿真分析，分析参考相位对高程误差的影响。根据分析结果，结合外部粗精度高程数据、滤波后的干涉相位及相干系数，提出高精度参考相位快速估计算法，并给出算法详细实现流程。对实际机载双天线干涉合成孔径雷达系统获取的数据进行处理，结果表明：算法在文中的系统参数下可以达到优于2 m的相对高程精度，处理4096×6560像素的数据块时，参考相位估计速度至少增大20倍。 |
| 关键词: 干涉合成孔径雷达 相位解缠 参考相位 数字高程模型 快速估计 |
| DOI：10.11887/j.cn.201701025 |
| 投稿日期：2015-09-09 |
| 基金项目:国家自然科学基金资助项目（41201468, 61302133, 61302165)；上海市自然科学基金资助项目（15ZR1439500）；湖南省教育厅优秀青年基金资助项目（16B004） |
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| Fast estimating algorithm for high precision reference phase based on airborne dual-antenna interferometric SAR system |
| CHEN Lifu1,2, PANG Kechen3, LI Yinwei4, SU Yi1, YUAN Zhihui3, WANG Jing5 |
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(1. College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China;2.
2. College of Electrical and Information Engineering, Changsha University of Science & Technology, Changsha 410004, China;3.2. College of Electrical and Information Engineering, Changsha University of Science & Technology, Changsha 410004, China;4.3. Shanghai Radio Equipment Research Institute, Shanghai 200090, China;5.4. Communication and Information Engineering College, Xi′an University of Science and Technology, Xi′an 710054, China)
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| Abstract: |
| In dual-antenna interferometric synthetic aperture radar system, the reference phase was usually estimated by joint calibration with transferring corresponding points for the scene without ground control points, which is too time-consuming. To solve the problem, the factors influencing the reference phase were analyzed. The analytic formula was given, and simulation was done according to the system parameters. The height error caused by reference phase was analyzed. According to the analysis results, the high precision real time reference phase estimating algorithm was presented, combined with the extern coarse precision elevation, the filtered interferometric phase and coherence. The detailed flow of the algorithm was given. The processing results of the real data from airborne dual-antenna interferometric synthetic aperture radar system validate that a 2 m relative elevation precision can be achieved with the system in the paper by the algorithm presented, and the estimated speed can reach more than 20 times faster when processing the data of 4096×6560pixel. |
| Keywords: interferometric synthetic aperture radar phase unwrapping reference phase digital elevation model fast estimation |
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