摘要
信号特征提取是信息对抗与通信侦察领域的关键技术。首先对信号的时频变换进行了分析,对数字信号进行平滑伪Wigner-Ville变换,并在时频域提取数字信号的Rényi熵值特征,分析了Rényi的阶数与信号特征空间距离的关系。仿真分析表明,数字信号三阶Rényi特征具有良好的特征距离以及特征鲁棒性,说明文章提出的平滑伪Wigner-Ville变换Rényi熵值特征的有效性。
The signal extraction is the key technology of information countermeasure and communication investigation.Firstly,analyzes the time-frequency of the signal,a pseudo-smooth Wigner-Ville transform is proposed for digital signal;And then,the Rényi entropy of digital signal is extracted from the time-frequency domain,the relationship between the order of Rényi and the spatial distance of signal characteristics is analyzed.The simulation analysis shows that the 3-order Rényi feature of digital signal has good characteristic distance and robustness.The effectiveness of Rényi entropy value feature of pseudo-smooth Wigner-Ville transgorm is presented in this paper.
作者
汪亮
杨成杰
王灿
蔡乾
WANG Liang;YANG Cheng-jie;WANG Can;CAI Qian(Shanghai Radio Equipment Research Institue,Shanghai 200090,China)
出处
《制导与引信》
2019年第3期46-50,共5页
Guidance & Fuze
关键词
时频变换
特征提取
信息熵
time-frequency conversion
feature extraction
information entropy
