National Laboratory of Radar Signal Processing, Xidian University, Xi'an 710071, China.
Sensors (Basel). 2019 Apr 10;19(7):1701. doi: 10.3390/s19071701.
Considering the difficulty of pulse repetition frequency (PRF) design in multi-angle SAR when using ultra-high speed platforms, a multi-angle SAR imaging system in a unified coordinate system is proposed. The digital multi-beamforming is used in the system and multi-angle SAR data can be obtained in one flight. Therefore, the system improves the efficiency of data recording. An improved range migration algorithm (RMA) is used for data processing, and imaging is made in a unified imaging coordinate system. The resolution of different view images is the same, and there is a fixed delay between the images. On this basis, the SAR image fusion is performed after image matching. The results of simulation and measured data confirm the effectiveness of the system and the method.
考虑到使用超高飞行速度平台时多视角 SAR 的脉冲重复频率（PRF）设计的困难，提出了一种统一坐标系下的多视角 SAR 成像系统。该系统采用数字多波束形成技术，可在一次飞行中获取多角度 SAR 数据，从而提高了数据记录的效率。采用改进的距离徙动算法（RMA）进行数据处理，并在统一成像坐标系中进行成像。不同视角图像的分辨率相同，并且图像之间存在固定的延迟。在此基础上，进行图像匹配后进行 SAR 图像融合。仿真和实测数据的结果验证了系统和方法的有效性。
