基于波数域算法的FMCW SAR运动补偿

Motion Compensation Basedon Wavenumber Domain Algorithm for FMCW SAR

为了实现机载调频连续波合成孔径雷达(FMCW SAR)的高分辨率成像,文中对Stolt变换进行改进,将传统的波数域算法与两步运动补偿法相结合,提出一种适合FMCW SAR运动补偿的波数域算法。该方法将运动补偿分解为一次运动补偿和二次运动补偿,使得方位聚焦在二次运动补偿之后,有效的补偿了该误差,并得到良好的成像效果。文章最后对点目标成像进行仿真验证,证实该算法是有效的。

In order to get high resolution imaging of aircraft frequency modulated continuous wave synthetic aperture radar（ FMCW SAR）,in this paper,by improving Stolt transform,combining the wavenumber domain algorithm with the traditional two step motion compensation method,a new wavenumber domain algorithm suitable for FMCW SAR was put forward. This method decomposes motion error compensation into first and second compensation,and the azimuth focusing would be after the second motion compensation,which makes the motion error get effective compensation and get a good result of resolution imaging. At the end of this paper,simulation of point target imaging confirmed that the algorithm is effective.