摘要
介绍了一种新的雷达辐射源特征提取算法,该算法首先通过伪维纳分布寻找一个随时间变化的最佳窗,基于该窗精确估计信号的瞬时频率,从瞬时频率估计中,可以识别出相位编码信号,然后对于不同的编码类型,利用所估计的瞬时频率,提取瞬时频率的自相关的主瓣峰值和最大旁瓣值的比值作为识别特征。仿真实验证明该算法提取的特征值可有效识别不同体制的雷达信号。
A new algorithm for extracting radar emitters＇ feature is introduced. This algorithm firstly estimates signal＇s instantaneou frequency using pseudo-Wigner distribution （PWD） with varying and data-driven window length, then calculates the feature based on the instantaneous frequency. The feature is described as the ratio of auto-correlation between maximal masterlobe and maximal sidelobe. Simulation shows the algorithm proposed can identify different radar emitters.
出处
《航天电子对抗》
2008年第5期36-39,共4页
Aerospace Electronic Warfare
关键词
辐射源
特征
瞬时频率
自相关
radar emitter
feature
instantan.eous frequency
auto-correlation
