摘要
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。
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 autofoeus 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 cnn＇ecting 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.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2014年第4期71-76,共6页
Journal of National University of Defense Technology
基金
国家自然科学基金资助项目(61072116)
关键词
多普勒调频率估计
包络校正
相位补偿
Doppler rate estimation
residual range cell migration
phase error compensation
