基于时频特征提取的雷达有源干扰识别  

Radar Active Jamming Identification Based on Time-Frequency Characteristic Extraction

作　　者：郝万兵 马若飞[1] 洪伟[1] Hao Wanbing;Ma Ruofei;Hong wei(Xi'an Electronic Engineering Research Institute,Xi'an 710100)

机构地区：[1]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2017年第4期11-15,共5页Fire Control Radar Technology

摘　　要：论文围绕典型的雷达有源干扰展开,研究了几种干扰信号的产生机理,建立了干扰模型,分析了五种典型干扰信号的特征差异,采用Choi-Williams分布作为干扰信号的描述方法,给出了基于得到的干扰信号时频二维分布图像,提取了有效的时频域特征参数集,通过仿真对比,对特征集进行降维,最后采用支持向量机(SVM)对雷达有源干扰进行识别,为后续雷达抗干扰提供先验信息。论文通过MATLAB仿真实验对使用方法进行了验证,分析了使用方法的性能和可行性。On basis of typical radar active jamming,mechanism of generating several jamming signals is studied;jamming model is established;characteristic difference of 5 kinds of typical jamming signal is analyzed;time-frequency 2-dimensional distribution image based on obtained jamming is given by using Choi-Williams distribution as describing method of jamming signal;effective time-frequency characteristic parameter set is extracted.The dimensionality reduction of characteristic set is performed by simulation and contrast;and finally,SVM(support vector machine)is used to identify active jamming,providing prior information for subsequent radar anti-jamming.The used method is verified by MATLAB simulation experiment;and its performance and feasibility is analyzed.

关 键 词：雷达抗干扰 有源干扰 干扰识别 特征提取 分类器设计 

分 类 号：TN97[电子电信—信号与信息处理]