摘要
针对多种脉内调制信号同时存在的识别问题,提出了基于分数阶傅里叶变换(FRFT)和多重相位差分相结合的雷达信号脉内调制识别算法,通过两种识别算法的嵌套使用,实现了信号的粗分到细分。采用FRFT区分线性调频(LFM)信号与其它编码信号,采用多重相位差分识别频率编码信号与相位编码信号,通过仿真实验验证了该信号识别算法的有效性。
In view of the recognition of several in-pulse modulation signals,this paper proposes a radar signal in-pulse modulation recognition algorithm based on the combination of fractional Fourier transform(FRFT)and multiple phase differences,through the nesting of two recognition algorithms,realizes the signal recognition from coarsely to finely,uses FRFT to distinguish linear frequency modulation(LFM)signals from other coded signals,and uses multiple phase differences to identify frequency coding signals and phase coding signals,validates the effectiveness of the signal recognition algorithm through simulation experiment.
作者
王书豪
阮怀林
吴世俊
WANG Shu-hao;RUAN Huai-lin;WU Shi-jun(National University of Defense Technology,Hefei 230037,China;Unit 96713 of PLA,Shangrao 334109,China)
出处
《舰船电子对抗》
2019年第4期71-75,104,共6页
Shipboard Electronic Countermeasure
关键词
信号识别
脉内调制信号
分数阶傅里叶变换
多重相位差分
signal recognition
in-pulse modulation signal
fractional Fourier transform
multiplephase difference
