基于运动参数估计的窄波束宽幅SAR成像算法  

Wide Azimuth Scene Narrow Beam SAR Imaging Algorithm Based on Motion Parameters Estimated from SAR Data

作　　者：邢孟道[1] 保铮[1] 

机构地区：[1]西安电子科技大学,西安710071

出　　处：《现代雷达》2004年第2期37-41,共5页Modern Radar

基　　金："十五"预研基金 (No :413 0 70 5 0 2 );重点实验室基金 (No :5 14 42 0 10 3 0 1DZ0 1)

摘　　要：近年来 ,国内多家研究所已研制出机载试验SAR。但从这些试验雷达的导航仪器测得的运动参数精度较低 ,为作精确的运动补偿 ,运动参数需要从实测数据估计得到。本文利用基于数据的多普勒中心和调频率估计方法 ,对运动参数的变化历程作了长时间的精确估计 ,并将运动补偿和成像算法有机结合在一起 ,可在飞行状态不很理想时 。In recent years, many research institutes have developed experimental airborne SAR systems. But the precision of motion parameters measured by navigational instruments on these radars are low, so motion parameters must be estimated from raw data for accurate motion compensation. In this paper, Doppler centroid and Doppler rate estimation methods based on raw data are used to estimate the motion parameters precisely for a long time. Then, motion compensations are combined with imaging algorithm. Finally, high quality wide swath SAR images are obtained, though the flying situation of the airplane is not ideal.

关 键 词：运动参数估计 SAR 成像算法 合成孔径雷达 多普勒调频率 运动补偿 

分 类 号：TN958[电子电信—信号与信息处理]