【摘要】 为实现对多分量线性调频辐射源信号的有效检测和识别,提出一种基于独立分量分析(ICA)联合Wigner-Hough时频分析的多分量线性调频辐射源信号分析方法。该方法采用先时域分离再时频分析的思想,在低信噪比情况下,克服了Wigner-Hough变换对多分量线性调频(LFM)信号特征提取受噪声困扰的问题。仿真结果表明,提出的方法与传统时频分析方法相比,对多分量LFM信号的分离及特征提取效果更好。更多还原

【Abstract】 To effectively detect and recognize multi-component Linear Frequency-Modulated(LFM) emitter signals,a multi-component LFM emitter signal analysis method based on the Independent Component Analysis(ICA) which was combined with the Wigner-Hough transform was proposed.The idea adopted to this method was the time-domain separation and then time-frequency analysis,and in the low SNR cases,the problem which is generally plagued by noised of feature extraction of multi-component LFM signal based on Wigner-Hough transform is overcame.Compared to the traditional method of time-frequency analysis,the computer simulation results show that the proposed method for the multi-component LFM signal separation and feature extraction was better.更多还原