The invention discloses a motion error compensation method based on an unmanned aerial vehicle bistatic SAR system. According to the method, the motion sensitivity model is constructed, the motion error parameter is screened based on the sensitivity between the motion error parameter and the imaging quality, the degree of freedom of the motion error is reduced, and therefore the difficulty of motion compensation is reduced; meanwhile, on the basis of sub-image division and sub-aperture imaging, sub-aperture regional fitting compensation is utilized, global motion compensation is achieved, the method is suitable for the imaging environment with few sparse scene strong contrast regions, and the problem that under a small unmanned aerial vehicle BiSAR system, a traditional motion error compensation algorithm is not applicable when the motion error of a transceiver has large space-variant characteristics is solved.
本发明公开了一种基于无人机双基地SAR系统的运动误差补偿方法。本发明通过构建运动灵敏度模型,基于运动误差参量与图像成像质量之间的灵敏度筛选运动误差参量,降低运动误差自由度,从而降低运动补偿的难度;同时基于子图像划分和子孔径成像,利用子孔径分区域拟合补偿,实现全局运动补偿,适用于稀疏场景强对比度区域较少的成像环境,解决了小型无人机BiSAR系统下,当收发机的运动误差存在大空变性时传统的运动误差补偿算法不适用的问题。
Motion error compensation method based on unmanned aerial vehicle bistatic SAR system
基于无人机双基地SAR系统的运动误差补偿方法
29.09.2023
Patent
Elektronische Ressource
Chinesisch
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