摘要
传统合成孔径雷达(synthetic aperture radar,SAR)成像技术假设目标回波是由各向同性的点散射模型的相干叠加形成,在大转角成像时不再适用。且各向同性的散射模型忽略了目标同一结构像素间的相关性,容易导致结构不连续,给后续目标识别带来困难。为此,本文提出了一种基于属性散射中心模型的SAR成像算法,利用不同散射中心表现出的不同特性对其分别进行成像,增强属于同一结构的像素间的相关性,提高SAR图像的可视性。最后,基于仿真和实测数据实验结果,验证了方法的有效性,与现有算法对比,所提算法的图像质量在定性和定量评价指标上都有所提升。
Traditional synthetic aperture radar(SAR)imaging methods assume that radar targets are composed of point based scattering centers,which is not suitable for wide angle imaging.Moreover,gaps of components may be resulted because of neglecting their inherent scattering behaviors.In this way,it is hard to interpret and identify targets from SAR images.Therefore,a component imaging method for SAR is proposed in this paper,taking into account the inherent behaviors of components of radar targets to enhance the integrity of components in SAR.As a result,the SAR image is more likely to be understood by non-expert.Finally,experimental results based on both simulated and real measured data validate the effectiveness of the proposal.Compared with traditional methods,the proposal has improved the quality of the image both qualitatively and quantitatively.
作者
段佳
曹兰英
吴亿锋
DUAN Jia;CAO Lanying;WU Yifeng(Chinese Aviation Industry Company Leihua Electronic Technology Research Institute,Wu’xi 214031,China;School of Electronics and Communication Engineering,Sun Yat-sen University,Guangzhou 510275,China)
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2021年第10期2782-2788,共7页
Systems Engineering and Electronics
关键词
特征增强
散射中心
合成孔径雷达成像
feature enhancement
scattering center model
synthetic aperture radar(SAR)imaging
作者简介
段佳(1989-),女,高级工程师,博士,主要研究方向为雷达成像、电磁特征提取;曹兰英(1976-),女,研究员,博士,主要研究方向为雷达信号处理;通讯作者:吴亿锋(1988-),男,副教授,博士,主要研究方向为雷达目标检测。
