基于旋翼结构微多普勒特征的目标识别方法

Target identification method based on rotor structure micro-Doppler characteristics

根据飞机目标旋转部件周期运动对电磁波的调制特性,建立了旋翼目标回波信号的数学模型;在分析雷达回波谱特性基础上提取了表征目标姿态及旋翼调制信息的能量特征、对称性特征,并用双谱法获取旋转部件回波(JEM)周期调制特征;最后,提出了一种新的飞机目标自动辨识方法,仿真证实了该方法具有较高综合辨识能力和正确辨识率.

According to the modulation mechanism of periodic motion of the aircraft rotating components, a rotor target echo signal mathematical model is established, After analyzing the echo spectral characteristic, the energy and symmetry feature are obtained, by using bispectra algorithm obtain the jet engine modulation（JEM） cycle characteristics. A new method is proposed for identifying targets. Simulation and analysis result confirms the effectiveness of the method.