| 非理想航迹城市建筑群MIMO下视阵列SAR三维仿真 |
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| 引用本文： | 刘辉,徐青,靳国旺,楼良盛.非理想航迹城市建筑群MIMO下视阵列SAR三维仿真[J].武汉大学学报(信息科学版),2019,44(3):413. |
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| 作者姓名： | 刘辉 徐青 靳国旺 楼良盛 |
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| 作者单位： | 1.华北水利水电大学测绘与地理信息学院, 河南 郑州, 450046 |
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| 基金项目： | 国家自然科学基金41071296国家自然科学基金41474010国家自然科学基金61401509国家自然科学基金41371439河南省高等学校重点科研项目19A420008 |
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| 摘 要： | 在缺少真实下视阵列合成孔径雷达（synthetic aperture radar，SAR）系统而带来数据获取和成像算法研究等困难的当下，下视阵列SAR三维仿真的研究具有重要意义。为了还原载机平台真实的飞行航迹，验证阵列SAR技术在高层建筑物密集城区的地形测绘能力，摒弃传统仿真研究基于匀速直线运动的假设，以高度骤变的城市建筑物为对象，分析构建了多输入多输出（multiple input multiple output，MIMO）下视阵列SAR非理想航迹运动误差模型，提出了非理想航迹城市建筑群MIMO下视阵列SAR三维距离多谱勒成像算法。利用航空平台的航迹与姿态建模仿真技术，以及快速高效的回波仿真技术对成像算法进行了仿真实验，验证了方法的正确性和有效性。
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| 关 键 词： | 多输入多输出(MIMO) 下视阵列SAR 城市建筑群 非理想航迹 |
| 收稿时间： | 2018-01-19 |
Urban Buildings MIMO Downward-Looking Array SAR 3D Simulation Under Non-ideal Trajectory |
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| Affiliation: | 1.College of Surveying and Geo-Informatics, North China University of Water Resources and Electric Power, Zhengzhou 450046, China2.Institute of Geospatial Information, Information Engineering University, Zhengzhou 450001, China3.Xi'an Institute of Surveying and Mapping, Xi'an 710045, China |
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| Abstract: | In the era of absence of realistic downward-looking array synthetic aperture radar (SAR) system, the difficulties in data acquisition and further imaging algorithms research have been brought about. So the research of downward-looking array SAR three-dimensional (3D) simulation has great significance. In order to restore the aircraft's real flight path and to verify the topographical mapping ability of array SAR technology in high-rise buildings, the traditional simulation research based on the assumption of uniform linear motion is abandoned. And the non-ideal trajectory motion error model of MIMO(multiple input multiple output) downward-looking array SAR is analyzed and constructed with high-abrupt urban buildings. The 3D range-Doppler (RD) imaging algorithm of urban buildings MIMO downward-looking array SAR under non-ideal trajectory is proposed. Then the flight path and attitude modeling simulation technique of the aeronautical platform, and a fast and efficient echo simulation technique are used to carry out simulation experiments. The correctness and effectiveness of the imaging algorithm are verified by the imaging results. |
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