机载大斜视雷达成像算法研究

基于大斜视合成孔径雷达成像的空间几何模型和回波数据的特点,通过距离向和方位向解线性调频处理和在时域进行距离走动和距离弯曲校正,分别对方位向和距离向进行傅里叶变换将信号压至正确的位置上。该算法从成像的实时性出发,立足于在分辨率达到要求的条件下尽可能降低运算量和复杂性。由于补偿了高次相位项,此算法受斜视角的影响很小,能精确地处理大距离走动和弯曲。点目标仿真和实测数据成像结果证明了算法的可行性。

A Study on Airborne High Squint Radar Imaging Algorithm

Based on high squint SAR imaging of the spatial geometry models and the characteristics of echo data,the solution is processed to the linear frequency modulation in distance and azimuth.It corrected the walking distance and range bending in the time domain.And then the separately Fourier transform of azimuth and distance make the signal to the correct position.The algorithm started from the real-time imaging,based on the resolution of the required conditions,minimize the volume and complexity of operations....