雷达抗欺骗式干扰信号特征提取方法

欺骗式干扰由于与雷达回波特征相近,对军用雷达造成严重威胁,迫切需要研究雷达抗欺骗式干扰新方法。为了分析提取欺骗式干扰和目标回波信号之间的不同特征,从而实现雷达抗欺骗式干扰,该文通过对欺骗式干扰和目标回波数学模型进行分析和仿真,比较了欺骗式干扰和目标回波在幅度起伏、高阶累积量和双谱特征方面的不同特征;并提出了特征提取方法,定义3组特征因子,构建了抗欺骗式干扰特征参数集。通过仿真和外场试验的数据对部分特征进行了验证。

Signal Feature Extraction Methods of Radar Anti-deception Jamming

Since the features of jammer are similar to that of target echoes, the deception jamming poses a most serious threat to military radar. Therefore, there is an urgent need for new radar anti deception jamming methods. In order to accomplish radar anti deception jamming, it is necessary to analyze and extract the different features of the deception jamming and target echo. The mathematical models of deception jamming and target echo are given and studied firstly, then the differences in the amplitude undulation features, high order cumulant features and bispectrum features between the deception jamming and target echo are compared. Based on the results of feature analysis, the feature extraction methods applied in radar anti deception jamming are proposed and three feature factors are defined, then the feature parameters aggregate is built. Finally, the feature extraction methods are verified with simulation and real data in an actual deception jamming experiment.