雷达辐射源信号符号化脉内特征提取方法

Intra-Pulse Feature Extraction of Radar Emitter Signals Based on Symbolization Method

提出一种对雷达辐射源信号进行符号化分析的雷达辐射源信号脉内特征提取方法,该方法能够从信号中快速有效地提取定量信息。将符号化过程中反映信号自相关特性的采样时延和反映信号调制规律特性的香农熵作为脉内特征。通过对7种雷达辐射源信号仿真实验和数据分析表明:提取的样本特征在低信噪比(0~5 dB)情况下具有很好的抗噪性和可聚类性,同时算法计算简单快捷,能够简化分类器的设计,故有利于工程应用。

An approach for intra-pulse feature extraction of radar emitter signals is presented based on symbolic time series analysis.The method can efficiently obtain the quantitative information from signals.The sampling time-delay and the Shannon entropy are used as a two-dimensional feature vector.The time-delay feature can determine the length of time series and the entropy feature can reveal deterministic and complexity of radar modulation signals.Experimental result and data analysis indicate that features of ...