基于chirplet的弹道目标逆合成孔径雷达回波分解  

Inverse Synthetic Aperture Radar Echo Decomposition of Ballistic Target Based on Chirplet

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 [2]中国人民解放军63880部队

出　　处：《电子与信息学报》2010年第10期2353-2358,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60872134;60402032)资助课题

摘　　要：尾附体回波分量的分离是改善弹道目标主体ISAR成像质量的关键。该文建立了主体和尾附体的LFM回波模型,构建了慢时间域单频信号回波,分析了主体和尾附体的瞬时多普勒差异,提出了一种基于chirplet的慢时间域分解方法,将主体回波分解为若干线性调频信号,并重构了主体及尾附体回波,给出了具体实现步骤,仿真实验结果表明,ISAR成像质量较分离前有显著提高。The radar echo separation of appendix part is the key for improving ISAR image of ballistic target.This paper establishes the echo model of ballistic target.And the Doppler difference of body and appendix part is analyzed.A new decomposition in slow-time domain is proposed.The body echo is decomposed into several LFM signal components.The echo of body and appendix is reconstructed.Explicit procedure is given.Simulation result shows that the ISAR image is much better compared to the image based on original data.

关 键 词：ISAR CHIRPLET 进动 自旋 多普勒差异 

分 类 号：TN958[电子电信—信号与信息处理]