CAJ | 학술논문

在基于SAR回波的数据处理中，多普勒调频率具有很高的估计精度且对场景的依赖性很小，可以更广泛地用于自聚焦处理。基于多普勒调频率参数估计，针对回波包络及相位分别提出了误差提取模型，并通过包络误差校正和相位误差补偿两个步骤实现了高精度的运动补偿处理。实测数据表明，本文方法可以在低精度导航信息情况下获取高分辨率雷达图像。
재기우SAR회파적수거처리중，다보륵조빈솔구유흔고적고계정도차대장경적의뢰성흔소，가이경엄범지용우자취초처리。기우다보륵조빈솔삼수고계，침대회파포락급상위분별제출료오차제취모형，병통과포락오차교정화상위오차보상량개보취실현료고정도적운동보상처리。실측수거표명，본문방법가이재저정도도항신식정황하획취고분변솔뢰체도상。
For the parameters estimation of synthetic aperture radar (SAR)raw data,the estimation of Doppler rate is robust with the advantage of high estimation precision and less dependence upon situations.Thus it is widely employed in the autofocus correction.Based on the estimation of Doppler rate,two different error extraction models for the range migration and phase are proposed,respectively.The three dimension (3-D)motion errors are removed by correcting the residual range cell migration and compensating the phase errors,respectively.Real SAR data test shows that the proposed method is feasible to generate high resolution SAR image with only low-accuracy navigation information.