基于椭圆滤波和RAT/FRT的雷达信号调制样式识别  

Identification of Radar Signal Modulation Form Based on Elliptical Filtering and RAT/FRT

作　　者：万铮 王建[1] 张宁 WAN Zheng;WANG Jian;ZHANG Ning(The 724th Research Institute of CSIC,Nanjing 211106,China)

机构地区：[1]中国船舶重工集团公司第七二四研究所

出　　处：《火力与指挥控制》2019年第8期158-162,共5页Fire Control & Command Control

摘　　要：雷达信号波形的调制样式识别方法是电子情报侦察领域的重要研究内容。针对线性调频(LFM)、二进制频移键控(BFSK)、相位调制(包括高阶巴克码(HOB)、弗兰克码(Frank)、P1、P2、P3、P4码)等多种脉内调制样式的雷达信号,提出一种基于模糊域椭圆高斯滤波预处理的波形增强表示方法,并结合拉东-模糊变换(RAT)和分数傅里叶变换(FRT)算法实现脉内调制类型的自动识别。仿真结果表明,该方法结构简单,易于工程实现,并具备较高的分类准确率和低信噪比下良好的鲁棒性。The modulation type identification method of radar signal waveform is an important research direction in the field of electronic intelligence reconnaissance. For different intrapulse modulation types of radar signal such as linear frequency modulation(LFM),binary frequency shift keying(BFSK),phase modulation(including higher order Barker(HOB),Frank,P1,P2,P3,P4,etc.),this paper propose a waveform enhancement representation method based on ambiguity-domain elliptical Gaussian filtering for preprocessing. Then,some special technology such as Radon ambiguity transform(RAT)and fractional Fourier transform(FRT)are used to realize the automatic intrapulse modulation recognition. The simulation results show that the proposed method has higher classification accuracy and robustness in low signal-to-noise ratio situation and it is simple in structure and easy for engineering realization.

关 键 词：低截获概率雷达信号 调制分类 椭圆高斯滤波 电子侦察 

分 类 号：TN957.51[电子电信—信号与信息处理]