CAJ | 학술논문

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。
의거미다보륵효응원리，구건료장갑차량미동적뢰체회파수학모형，추도료장갑차량점목표적회파신호해석관계，병침대회파신호비평은비선성적특점，이용최우핵시빈분포결합구시빈척적방법，방진제취료장갑차량미동선목표적회파미다보륵특정。방진결과표명：선목표모형경능철현、해석장갑차량미동특정；채용적최우핵시빈분포결합구시빈척방법，구유비경전이차형분포경호적시빈상，능교호지제취출미다보륵특정。최후，이용해방법분석료저신조비하목표가속도、신관장도등삼수대미다보륵특정적영향。
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.