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通信工程2019年1期

基于短时傅里叶变换的雷达信号脉内特征 自动识别研究
晁娇
(中国船舶重工集团公司第七二三研究所,江苏 扬州 225001)

摘  要:一种能够同时对信号时域和频域分析的方法——短时傅里叶变换(STFT),可以在时频二维角度准确地描述信号的时间、频域的局部特性,与其他算法不同,通过该算法可以得到信号的瞬时频率随时间变化的变化规律,其在雷达信号的脉内特征分析中的效果明显。本文根据仿真结果,对不同类型信号经短时傅里叶变换后的结果进行统计,形成了基于短时傅里叶变换的雷达信号脉内特征自动识别流程,对电子侦察情报的获取及应用有重要的意义。


关键词:短时傅里叶变换;脉内特征;自动识别



中图分类号:TN957.51         文献标识码:A         文章编号2096-4706(2019)01-0050-04


An Auto Recognition Method for In-pulse Features of Radar Signal Based on STFT

CHAO Jiao

(The 723 Institute of CSIC,Yangzhou 225001,China)

Abstract:Short-time Fourier Transform(STFT),a method that can analyze signals in both time and frequency domains atthe same time,can accurately describe the local characteristics of signals in time and frequency domains from two-dimensional angleof time and frequency. Unlike other algorithms,this algorithm can obtain the variation law of instantaneous frequencies of signals withtime,and its effect is obvious in the analysis of radar signals’in-pulse features. According to the simulation results,the results ofdifferent types of signals after short-time Fourier transform are counted,and the automatic recognition process of radar signal in-pulsefeatures based on short-time Fourier transform is formed,which is of great significance to the acquisition and application of electronicreconnaissance information.

Keywords:short-time Fourier transform(STFT);in-pulse features;automatic recognition


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[3] 刘东霞. 脉内调制信号的分析与自动识别 [D]. 西安:西安电子科技大学,2003.


作者简介:晁娇(1991.05-),女,汉族,陕西合阳人,助 理工程师,硕士研究生,研究方向:电子对抗总体。