防空雷达螺旋桨飞机回波JEM特征的模型与分析  

Jet Engine Modulation signatures of propeller aircraft in Air-Defense Radar signals

作　　者：丁建江[1] 张贤达[1] 

机构地区：[1]清华大学自动化系,北京100084

出　　处：《清华大学学报（自然科学版）》2003年第3期418-421,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(69772023)

摘　　要：为了从防空雷达实际回波中提取可识别的喷气发动机调制(JEM)特征,建立了适用于防空雷达实际的JEM参数模型。在理想螺旋桨飞机JEM模型的基础上,讨论了实际螺旋桨飞机结构和飞行姿态对JEM特征的影响和防空雷达有关参数对JEM特征的限制,并用实际螺旋桨飞机和防空雷达参数对该模型进行了仿真分析,再通过分析不同飞行姿态螺旋桨飞机实际回波的JEM特征验证了该模型。结果表明:JEM周期特征只取决于桨叶数量和转速,能可靠地从防空雷达回波中提取出来,而JEM其它特征与飞机结构、飞行姿态和雷达参数有较复杂的关系。The identifiable features in AirDefense Radar signals were extracted using a Jet Engine Modulation (JEM) parameter model designed for the radar system. The influence of propeller aircraft on the JEM signatures and the related radar limitations were analyzed using an ideal JEM model of the propeller aircraft. The model was validated by analyzing JEM signatures of actual radar signals. The results demonstrated that the JEM periodicity depended only on the blade number and the rotational speed so it can be reliably extracted from the actual radar signal. Other JEM features have a complicated relation with the actual propeller aircraft configuration and orientation.

关 键 词：防空雷达 螺旋浆飞机 参数模型 JEM特征 

分 类 号：TN951[电子电信—信号与信息处理] TN957[电子电信—信息与通信工程]