基于时变三维坐标重构的空间锥体目标微动特征提取方法  

Micro-Motion Feature Extraction for Space Cone Targets Based on Time-Varying Three-Dimensional Image Reconstruction

作　　者：蒋国建 宫志华 梁婷 李开明[1] 张群[1] JIANG Guojian;GONG Zhihua;LIANG Ting;LI Kaiming;ZHANG Qun(College of Information and Navigation,Air Force Engineering University,Xi'an 710077,China;Unit 63850,Baicheng 137001,Jilin,China)

机构地区：[1]空军工程大学信息与导航学院,西安710077 [2]63850部队,吉林白城137001

出　　处：《空军工程大学学报（自然科学版）》2020年第2期47-52,共6页Journal of Air Force Engineering University(Natural Science Edition)

基　　金：国家自然科学基金(61701530);陕西省自然科学基础研究计划(2020JM-348)。

摘　　要：针对现有微动特征提取方法在散射系数复时变条件下不适用的问题,提出了一种基于时变三维坐标重构的微动特征提取方法。首先建立旋转对称空间锥体目标的微动信号模型,其次通过动态规划进行散射点分离,对各个散射点相位干涉处理后获得目标的时变三维像,最后利用高精度的三维坐标重构提取目标的三维微动特征。通过仿真实验在散射系数复时变的情况下进行微动特征提取,结果显示该方法的微动特征提取精度较传统方法有明显提高,可以较好地适用于散射系数复时变的情况。Aimed at the problem that the existing micro-motion feature extraction method is unapplicable under the condition of the scattering coefficient of the complex time-varying,this paper puts forward a kind of micro-motion feature extraction method based on time-varying 3-D image coordinate reconstruction.By the use of this method,firstly,the micro-motion signal model of the rotating symmetric space cone target is established,then the scattering points are separated by dynamic programming to obtain the time-varying three-dimensional image of the target after the phase interference of each scattering point.And finally,the3-D micro-motion feature of the target is extracted by using high-precision 3-D coordinate reconstruction.The simulation results show that the accuracy of the proposed method is better than that of the traditional method.The proposed method can be well applied to the case of complex time-varying scattering coefficients.

关 键 词：干涉 三维微动特征提取 旋转对称空间目标 进动 

分 类 号：TN957[电子电信—信号与信息处理]