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.
出处
《火力与指挥控制》
CSCD
北大核心
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)
关键词
装甲车辆
线目标
时频分析
微多普勒效应
armor target
line target
time-frequency analysis
micro-doppler effect
