基于微多普勒的雷达目标特征参数提取方法比较

COMPARISON OF SEVERAL METHODS OF WARHEAD TARGET PARAMETER ESTIMATION AND FEATURE EXTRACTION BASED ON THE MICRO-DOPPLER EFFECT

从雷达探测到的众多目标中识别出真目标,进而进行有效的拦截是导弹防御系统中的关键技术。利用雷达获得的微多普勒效应进行真伪目标判定是目前较为先进的目标识别方法之一。选择弹道导弹的弹头目标建立其运动模型,通过对基于微多普勒的时频分析法、频谱与倒谱法、延时共轭法等三种常用方法对弹头目标的微多普勒特征参数提取的计算、仿真和分析,给出了各种方法的优缺点和适用范围。仿真结果表明:在散射点数目较少时,延时共轭法可以快速准确地估计目标的微动特性。

It is a key technology in the missile defense system to identify the true target from the many targets detected by the radar and to effectively intervene. The use of radar to obtain the micro-Doppler effect of the authenticity of the target decision is one of the more advanced target recognition methods. Based on the micro-Doppler time-frequency analysis method, frequency spectrum and cepstrum method and delay conjugation method, the micro-Doppler characteristic parameters of the warhead target are established by using three kinds of common methods of ballistic missile target. Extraction of the calculation, simulation and analysis, given the advantages and disadvantages of various methods and the scope of application. The simulation results show that the delay conjugation method can quickly and accurately estimate the fretting characteristics of the target when the number of scattered points is small.