复AR双谱及在常规雷达目标分类中的应用

根据飞机喷气发动机调制(JEM)特征产生机理和参数模型及常规雷达回波特点,本文采用复AR双谱技术分析了常规雷达回波中的JEM特征,揭示了回波中JEM频率和径向Doppler频率之间的耦合关系,并从双谱切片中提取了相对不变的JEM周期特征。提出了基于JEM周期特征的目标分类方法。实测数据分类实验表明:JEM周期特征用于常规雷达飞机目标分类是有效的。

Complex AR Bispectrum and Application to Target Classification in the Conventional Radar

This paper analyses JEM (Jet Engine Modulation) signatures of the aircraft returns in the Conventional Radar (CR) by using complex AR bispectrum and uncovers the coupling between JEM and radial Doppler frequencies, based on induction mechanism of JEM signatures, parameter modeling and returns characteristics of the CR. A relatively unchangeable JEM periodic signature is extracted from the bispectrum slice. A method of target classification based on JEM periodic signature is proposed. The classification results using actual data demonstrate that JEM periodic signature is effective for classification of aircraft in the CR.