摘要
真假目标识别是弹道导弹防御系统的主要技术瓶颈之一,在一定程度上决定了反导系统的成败。微多普勒是目标的一种新的"唯一"雷达特征,"唯一"是指不同的微运动会产生不同的微多普勒。基于弹头和诱饵微动特性的差异,提取相应的微多普勒特征可用于识别真假目标。在介绍弹头和诱饵运动特性的基础上,引入微多普勒概念,建立了弹头和诱饵的微动模型,并分别用矩阵法和代数法推导了其微多普勒的理论公式。理论计算与仿真实验的结果吻合良好,表明本文数学模型和理论推导的正确性;以微多普勒带宽、周期以及时频面上的变化规律为特征,可以区分真假目标。
Identification of warhead and decoys is one of the main technological bottlenecks in ballistic missile defense system, which determines whether the anti-missile system is successful or unsuccessful to some extent. Micro-Doppler is regarded as a new and unique radar signature of target, where the uniqueness of micro- Doppler signature means different micro-motions have distinguished signatures. Based on differences in micro-motions between warhead and decoys, micro-Doppler signatures might be extracted for target identification. After the motion performance of warhead and decoys is introduced, the concepts on micro-Doppler are displayed, and the micro-motion models of the warhead and decoys are built, and meanwhile the theoretical derivation of the micro-Doppler is carried out with matrix and algebra methods, respectively. The computing result is in accordance with the simulating one, which suggests that the mathematic models and the theoretic derivation are valid; the bandwidth, period and the plane-varying character of micro- Doppler can be used as features to discriminate warhead and decoys.
出处
《电波科学学报》
EI
CSCD
北大核心
2008年第4期775-780,共6页
Chinese Journal of Radio Science
关键词
弹头
诱饵
微动
微多普勒
雷达识别
warhead
decoy
micro-motion
micro-Doppler
radar identification
