多基站ISAR空间微动目标三维成像方法  

Multi-static ISAR Three-Dimensional Imaging of Spatial Micro-motion Target

作　　者：何兴宇 孙晨阳 方钢 HE Xingyu;SUN Chenyang;FANG Gang(Air Traffic Control and Navigation College,Air Force Engineering University,Xi′an 710051,China)

机构地区：[1]空军工程大学空管领航学院,陕西西安710051

出　　处：《现代防御技术》2025年第2期141-148,共8页Modern Defence Technology

基　　金：中国博士后科学基金(2022M723876);陕西省自然科学基础研究计划(2024JC-YBMS-466)。

摘　　要：对目标三维成像的研究是进行特征提取与识别的重要途径。卫星和弹道导弹等空间目标通常具有进动的运动属性,可用来进行目标的特征提取和识别。进动目标相对于传统逆合成孔径雷达(inverse synthetic aperture radar,ISAR)转台成像目标通常具有快速旋转的特性,利用传统成像方法通常面临越距离单元徙动问题。建立了多基站空间微动目标三维模型,并对微动成像原理进行了分析,推导了不同视角下雷达视线、目标进动轴与成像平面之间的关系,进而提出了散射中心三维重构方法。通过对多基站ISAR图像及模型的分析,完成了不同基站ISAR图像散射中心的关联,最终实现了目标的三维成像。仿真实验证明了所提方法能有效实现微动目标的三维成像。The research on target’s three-dimensional imaging is of significant meaning in feature extraction and recognition.Precession is the typical micromotion for cone-shaped space targets,such as warhead and satellites,which can be used for target feature extraction and identification.Inverse synthetic aperture radar(ISAR)imaging of a precession target,which is a kind of fast spinning target,is faced with migration through range cell when we use traditional imaging algorithms.Target’s micro-motion model is built and the theory of micro-motion imaging is analyzed.The relationship among radar’s line of sight,direction of target’s precession axes and imaging plane is derived.A new three-dimensional reconstruction method of scattering centers is proposed.With the analysis of multi-static ISAR image and the micro-motion model,the association of scattering centers in different station’s ISAR image is built.The target’s three-dimensional imaging is accomplished.Simulation experiments show the presented method is efficient in micro-motion target’s three-dimensional imaging.

关 键 词：雷达图像处理 三维成像 进动 多基站 散射中心关联 

分 类 号：TN957.52[电子电信—信号与信息处理] TN958[电子电信—信息与通信工程] TJ0[兵器科学与技术—兵器发射理论与技术]