基于最优核时频分布的装甲车辆微多普勒特征分析  

Analysis of Micro-Doppler Effect of Armored Vehicle Based on Adaptive Optimal Kernel Time-frequency Distribution

作　　者：张万君 牛敏杰[1] 杨雨迎[1] 吴晓颖[1] 

机构地区：[1]装甲兵工程学院,北京100072

出　　处：《火力与指挥控制》2015年第6期14-17,20,共5页Fire Control & Command Control

基　　金：国家自然科学基金资助项目(61174219)

摘　　要：依据微多普勒效应原理,构建了装甲车辆微动的雷达回波数学模型,推导了装甲车辆点目标的回波信号解析关系,并针对回波信号非平稳非线性的特点,利用最优核时频分布结合求时频脊的方法,仿真提取了装甲车辆微动线目标的回波微多普勒特征。仿真结果表明:线目标模型更能凸现、解析装甲车辆微动特征;采用的最优核时频分布结合求时频脊方法,具有比经典二次型分布更好的时频像,能较好地提取出微多普勒特征。最后,利用该方法分析了低信噪比下目标加速度、身管长度等参数对微多普勒特征的影响。An echo signal model of armored target is established by micro-motion line target model based on micro-doppler effect in this paper,for the non-stationary and nonlinear echo signal,feature parameters of echo signal can be extracted by adaptive optimal kernel time-frequency distribution（AOK TFR）and ridges-computed method. Simulation results show that the method is evidently better than point target model and other time-frequency methods,and the influences of different feature parameters such as the length of gun barrel and acceleration of vehicle on micro-doppler features at low signal-to-noise ratio is analyzed.

关 键 词：装甲车辆 线目标 时频分析 微多普勒效应 

分 类 号：TJ410[兵器科学与技术—火炮、自动武器与弹药工程]