机载SAR的地面运动目标成像处理  

Imaging of ground moving targets based on airborne SAR

作　　者：汤立波[1] 李道京[1] 吴一戎[1] 丁赤飚[1] 

机构地区：[1]中国科学院电子学研究所微波成像技术国家重点实验室

出　　处：《系统工程与电子技术》2005年第10期1681-1684,共4页Systems Engineering and Electronics

基　　金：国家"863"高技术计划资助课题(信息获取与处理)

摘　　要：基于先进的高分辨率机载SAR数据,研究了地面单个和多个运动目标的高分辨率成像问题。利用频域滤波法将地面运动目标信号从杂波中分离出来,在距离频率-方位时间域进行距离走动和距离弯曲校正,并在距离-多普勒域完成运动目标成像。PGA方法被用来对单个运动目标作进一步的聚焦处理。在多目标环境下,提出一种改进的距离弯曲校正方法,并利用时频分析方法有效地解决了多个地面运动目标的成像问题。给出了SAR实际数据成像处理结果。High resolution imaging of single moving target and multiple moving targets is studied based on high resolution airborne SAP. The signals of ground moving target are extracted from ground clutters by the Doppler filter. The linear range migration and range curve for moving target is corrected in “range frequency - azimuth, time” domain as well. The high resolution image of moving target is formed in “Range - Doppler” domain and PGA is used to improve the imaging quality of the single moving target. A new method is presented to correct the range curve of multiple moving targets. The time-frequency analysis is adopted for multiple moving targets imaging. The processing results of real SAR data are shown.

关 键 词：合成孔径雷达 运动目标成像 雷达成像 时频分析 

分 类 号：TN957.51[电子电信—信号与信息处理]