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为了定量分析和表征脉冲多普勒引信的抗干扰性能,以处理增益为参量,研究了周期调制干扰信号对脉冲多普勒引信的作用效果,明晰了脉冲多普勒引信抗干扰性能的影响因素。理论推导了典型周期调制干扰信号作用下,脉冲多普勒引信从接收回波到相关检测这一过程的处理增益,获得了脉冲多普勒引信抗干扰性能与影响因素之间的量化关系,既为脉冲多普勒引信抗干扰设计提供了理论依据,又为脉冲多普勒引信抗干扰性能评估提供了技术支撑。理论推导、仿真和实测结果表明:脉冲多普勒引信抗周期性调幅干扰性能弱于抗周期性调频干扰性能;抗周期调制干扰性能主要受距离门脉冲宽度、多普勒滤波器类型和带宽影响。
In order to quantitatively analyze and characterize the anti-jamming performance of pulsed Doppler fuze, the effect of periodic modulated interference signal on pulsed Doppler fuze is studied by taking the gain as the parameter, and the influencing factors of anti-jamming performance of pulsed Doppler fuze . The theoretical processing gain of pulse Doppler fuze from receive echo to correlation detection is deduced theoretically under the effect of typical periodic modulated interference signal. The quantitative relationship between the anti-interference performance of pulsed Doppler fuze and the influencing factors is obtained. It provides a theoretical basis for the anti-interference design of pulsed Doppler fuze and provides technical support for the anti-interference performance evaluation of pulsed Doppler fuze. The theoretical results show that the anti-cyclical AM performance of pulse Doppler fuze is weaker than that of anti-periodic FM interference. The performance of anti-periodic modulation is mainly affected by the distance gate pulse width, Doppler filter type and bandwidth .