一种高分辨率聚束SAR运动补偿算法研究

聚束SAR模式是获得高分辨率雷达图像的一种有效的方法。由于合成孔径时间较长,载机在合成孔径时间内飞行的非平稳性造成图像严重散焦,并且高分辨率SAR的距离向信号也存在相位误差。该文提出一种新的基于回波数据的运动补偿方法对载机的位置误差、距离向相位误差以及残余包络误差进行有效的估计,得到高分辨率的聚束SAR图像,并通过实测数据验证了该文方法的有效性。

Research on Motion Compensation Algorithm for High Resolution Spotlight SAR

Spotlight SAR is an efficiency way to obtain high resolution radar image. The non-stability of the aircraft motion during the long synthetic aperture time can make the image suffer the severe defocus, and there is phase error in the range direction in the high resolution SAR system. This paper presents a novel signal processing method based on echo signal to get high definition resolution spotlight SAR image, which can make an effective estimation on the aircraft position error, the phase error in range direction and the residual envelop error. The experiment results show that the proposed approach can get the high quality SAR image from raw data.