基于ISAR像序列的弹道目标进动特征提取  

Precession Feature Extraction of Ballistic Targets Based on Dynamic ISAR Image Sequence

作　　者：金光虎[1] 高勋章[1] 黎湘[1] 陈永光[2] 

机构地区：[1]国防科技大学电子科学与工程学院空间电子信息技术研究所 [2]中国人民解放军63880部队

出　　处：《电子学报》2010年第6期1233-1238,共6页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60872134;No.60402032)

摘　　要：中段弹道目标进动特征是分辨弹头及诱饵的重要依据.以二维ISAR图像序列为基础,分析了弹道目标成像特点和目标姿态角的变化过程,提出了基于图像配准的ISAR像姿态差估计方法;采用等间隔配准避免了配准奇异,根据姿态差二次方曲线实现了进动参数的估计,给出了计算目标进动角、进动周期的具体步骤.仿真结果表明,该方法能够实现弹道目标进动特征提取,估计精度较高.The precession parameters of ballistic targets are of great importance to warheads and decoys discrimination.Based on dynamic ISAR image sequence,this paper analyzes the specialties of scattering and ISAR imaging of spatial ballistic targets.The history of posture changing is deduced.And a method for posture difference evaluating based on image registration is proposed.Moreover,equal interval registration method is adopted to avoid singular registration.Precession parameters are extracted based on posture difference curve.And the extraction process is presented detailedly.Experimental results show that the posture difference can be estimated correctly and the precession parameter estimation has good precision.

关 键 词：弹道目标 进动 ISAR像 配准 特征提取 

分 类 号：TN953[电子电信—信号与信息处理]