近场目标特性的研究是研制导弹引信的基础,因此必须对近场目标特性进行必要的研究和分析。采用多散射点合成方法建立了伪码调相PD引信的目标近场散射模型,得出了引信处于目标电磁散射近区时的多普勒信号,并且讨论了该信号及其频谱的变化规律。在此基础上,给出了多普勒信号频谱受多点目标尺寸和脫靶量大小影响的仿真结果。

The designing of missile fuze was based on the research of the targets near field characteristic, it was necessary to study and analyze the targets near-field characteristic the targets near field scattering characteristic model of pseudo-noise code phase modulation pulse Doppler fuze are established by multiple scatter point synthesized method, in order to get the multi-point target s Doppler signal when this fuze locates in the target electromagnetic scattering near field of the target. Moreover, the variable law of multi-point target's Doppler signal and its frequency spectrum are also discussed. Based on the above findings, the simulation results of the influences of the size of multi point target and the miss distance on the Doppler signal frequency spectrum are given.