基于时变材料的合成孔径雷达图像二维调制方法  

Two-dimensional SAR image modulation method based on time-varying materials

作　　者：王俊杰[1,2] 冯德军[1,2] 胡卫东[1] WANG Junjie;FENG Dejun;HU Weidong(College of Electrical Science, National University of Defense Technology, Changsha 410073, China;State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System, National University of Defense Technology, Changsha 410073, China)

机构地区：[1]国防科技大学电子科学学院,湖南长沙410073 [2]国防科技大学电子信息系统复杂电磁环境效应国家重点实验室,湖南长沙410073

出　　处：《系统工程与电子技术》2022年第2期455-462,共8页Systems Engineering and Electronics

基　　金：国家自然科学基金(62001481)资助课题。

摘　　要：合成孔径雷达(synthetic aperture radar,SAR)能够通过高分辨图像中的尺寸、姿态、外形轮廓等关键信息对目标进行探测与识别,对关键军事目标造成了严重的威胁。如何有效控制目标的雷达特征,使其不易被SAR发现与分辨,已经成为干扰领域的关键问题。相较于有源干扰,无源干扰具有成本低、响应速度快、操作简单等优势,然而灵活性差、难以脉内调制一直困扰着无源干扰的发展。针对上述问题,提出一种基于时变材料的SAR图像二维调制方法。该方法利用相位调制表面(phase-switched screen,PSS)并采用电控的方式对雷达信号脉内脉间进行联合调制。通过控制调制参数,可以实现距离向、方位向和二维多假目标图像的灵活切换。实测SAR图像数据事后调制仿真验证了所提方法的有效性。Synthetic aperture radar(SAR)can detect and recognize targets through key information such as size,attitude and contour in high-resolution images,which poses a serious threat to key military targets.How to effectively control the radar characteristics of targets so that they are not easy to be found and distinguished by SAR has become a key problem in the field of jamming.Compared with active jamming,passive jamming has the advantages of low cost,fast response speed and simple operation.However,poor flexibility and difficult in pulse modulation have plagued the development of passive jamming.To solve the above problems,a two-dimensional modulation method of SAR image based on time-varying materials is proposed.This method uses phase-switched screen(PSS)and electronic control to jointly modulate the intra pulse and inter pulse of radar signal.By controlling the modulation parameters,the flexible switching of range,azimuth and two-dimensional multi false target images can be realized.Real time simulation of SAR image data shows the effectiveness of the proposed method.

关 键 词：合成孔径雷达 相位调制表面 二维调制 多假目标 

分 类 号：TN955[电子电信—信号与信息处理]