摘要
圆周合成孔径雷达(Circular Synthetic Aperture Radar,CSAR)可以对目标进行360°全方位观测,获得目标全方位散射信息。通过将CSAR成像数据划分成多个子孔径能够直接获取目标高度信息,本文在原有获取目标高度信息的方法基础上,进行了改进和创新,提出了一种新的提取目标高度信息的方法。本文通过对子孔径图像进行高度向投影,在一定程度上提高了计算精度,同时在子孔径选择时,也考虑了子孔径之间的相关性,有效地提高了算法的精确性。最后首次引入自主测量的L波段实测数据对本文所提算法进行验证,证实了该方法的有效性和准确性。
The circular synthetic aperture radar(CSAR)can observe the target in 360°and obtain the target s omni-directional scattering information.By dividing the CSAR imaging data into sub-apertures,the target height information can be directly obtained.Based on the original method of obtaining target height information and through improvement and innovation,this paper proposes a new method of extracting target height information.The height projection of the sub-aperture image improves the calculation accuracy to a certain extent.At the same time,the correlation between the sub-apertures is also considered when the sub-aperture is selected,which effectively improves the accuracy of the algorithm.Finally,for the first time,the L-band measured data is introduced for comparison and verification,which confirms the effectiveness and accuracy of the method proposed in this paper.
作者
李一石
陈乐平
安道祥
冯东
周智敏
LI Yishi;CHEN Leping;AN Daoxiang;FENG Dong;ZHOU Zhimin(College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China)
出处
《雷达科学与技术》
北大核心
2022年第5期507-512,519,共7页
Radar Science and Technology
基金
国家自然科学基金(No.62101566,62101562)。
关键词
圆周合成孔径雷达
目标高度提取
几何形变
子孔径相关性
circular synthetic aperture radar
target height extraction
geometric deformation
subaperture correlation
