中段弹道目标微多普勒历程修复算法  

The Micro-Doppler History Recovery Algorithm of Ballistic Target in Midcourse

作　　者：许旭光 冯存前[1,2] 李靖卿 贺思三 XU Xu-guang;FENG Cun-qian;LI Jing-qing;HE Si-san(Air and Missile Defense College,Air Force Engineering University,Xi’an,Shaanxi 710051,China;Collaborative Innovation Center of Information Sensing and Understanding,Xi’an,Shaanxi 710077,China;Unit 93786,PLA,Zhangjiakou,Hebei 075000,China)

机构地区：[1]空军工程大学防空反导学院,陕西西安710051 [2]信息感知技术协同创新中心,陕西西安710077 [3]中国人民解放军93786部队,河北张家口075000

出　　处：《信号处理》2018年第7期860-866,共7页Journal of Signal Processing

基　　金：国家自然科学基金(61372166;61501495)

摘　　要：针对由于遮挡效应导致的中段弹道目标微多普勒历程缺失问题,该文提出一种基于压缩感知理论的微多普勒历程修复算法。首先,建立进动目标滑动散射中心模型,分析其微多普勒特性;然后,探究不同观测角度下各散射中心的有效散射性,分析遮挡效应对于散射中心微多普勒历程的影响;最后,根据观测到的缺失的微多普勒历程,设计压缩感知框架下的观测矩阵,采用SP(Subspace Pursuits)算法对为微多普勒历程进行修复。仿真结果验证了遮挡效应对微多普勒历程的影响,证明了该文提出的修复算法能够有效修复缺失的微多普勒历程,同时分析了该算法修复效果与微多普勒缺失率之间的关系。Aiming at the deficiency of micro-Doppler history of ballistic target caused by shielding effects in midcourse,a novel method is proposed to recover the micro-Doppler history based on Compressed Sensing theory.Firstly,the mathematic model of sliding scatters of precession target is built and the micro-Doppler characteristic of each scatter is analyzed;secondly,whether the scatter can reflect the echo effectively in different witness views is researched and the influence of shielding effects on each scatter’s micro-Doppler history is analyzed;finally,according to the incomplete micro-Doppler history witnessed,an observation matrix in the framework of Compressed Sensing is designed and the SP(Subspace Pursuits)algorithm is applied to recover the micro-Doppler history.Simulation experiment shows that the influence of shielding effects on the micro-Doppler history,proves that the recovery algorithm could repair the micro-Doppler history effectively and analyses the relationship between the performance of the method and the missing rate of micro-Doppler.

关 键 词：滑动散射中心 遮挡效应 微多普勒历程 压缩感知 

分 类 号：TN957[电子电信—信号与信息处理]