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): 413-421, 442. DOI: 10.13203/j.whugis20160508
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): 413-421, 442. DOI: 10.13203/j.whugis20160508
LIU Hui, XU Qing, JIN Guowang, LOU Liangsheng. Urban Buildings MIMO Downward-Looking Array SAR 3D Simulation Under Non-ideal Trajectory[J]. Geomatics and Information Science of Wuhan University, 2019, 44(3): 413-421, 442. DOI: 10.13203/j.whugis20160508
Citation: LIU Hui, XU Qing, JIN Guowang, LOU Liangsheng. Urban Buildings MIMO Downward-Looking Array SAR 3D Simulation Under Non-ideal Trajectory[J]. Geomatics and Information Science of Wuhan University, 2019, 44(3): 413-421, 442. DOI: 10.13203/j.whugis20160508

非理想航迹城市建筑群MIMO下视阵列SAR三维仿真

Urban Buildings MIMO Downward-Looking Array SAR 3D Simulation Under Non-ideal Trajectory

  • 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。

     

    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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