基于时间分段信号的弹道导弹目标微多普勒调制周期估计  

Micro-Doppler Modulation Period Estimation of the Ballistic Missile based on Multi-section Signals

作　　者：刘丽华[1] 胡卫东[1] 郁文贤[2] 

机构地区：[1]国防科学技术大学电子科学与工程学院ATR重点实验室,湖南长沙410073 [2]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《信号处理》2010年第2期190-196,共7页Journal of Signal Processing

基　　金：重点实验室基金(9140C800102050C80)

摘　　要：地基空间探测相控阵雷达因需同时满足多任务、多目标的工作要求,通常采用时间分割的方式照射目标,本文针对这一特点,以弹道导弹为例,建立了单一目标分时段观测回波的数学模型,分析了带尾翼弹道导弹自旋运动对雷达回波的调制效应,从机理上揭示了利用微多普勒周期特征识别弹道导弹目标的可行性。论文针对时间分段信号特点,提出了一种利用Radon-pseudo-STFT提取目标径向半加速度的方法,并成功利用循环平均幅度自相关函数提取了加速度补偿后信号的微多普勒调制周期。Ground based Space Surveillance Phased Array （SSPA） Radar usually works on the mode of multi-tasking and multi-objects,and radiates objects in time segmentations.Aiming at this point,taking the ballistic missile （BM） as an example,the multi-section time segmented radar returns model was developed in the paper.And then the micro-Doppler modulation characteristic induced by finned missiles＇ spinning motion was analyzed.The feasibility of using micro-Doppler modulation period as an important feature parameter to recognize the BM target was opened out in theory.According to the characteristics of the multi-section signals,the Radon-p-STFT method was proposed to estimate the half radial acceleration.Based on the acceleration compensated signal,the micro-Doppler modulation period was extracted successfully utilizing circular Average Magnitude Difference Function （AMDF）.

关 键 词：弹道导弹 时间分段信号 微多普勒调制周期 Radon-p-STFT 加速度补偿 

分 类 号：TN957.524[电子电信—信号与信息处理]