机载PD雷达的速度欺骗干扰机理研究

The interfering mechanism research of the airborne PD radar velocity deception

针对原有的对脉冲多普勒雷达的假多普勒频率速度欺骗干扰存在一些不足的问题,提出了一种基于周期方波信号调制的假多普勒频率速度欺骗干扰技术。简述了原有多普勒频率欺骗干扰的原理及其不足、分析了基于周期方波信号假多普勒频率速度欺骗干扰的具体原理。通过仿真验证了干扰的可行性,并分析了合适的干扰参数取值,发现当调制周期方波信号的脉冲重频小,占空比足够小、功率足够大时,就能够在多普勒滤波器组的滤波器中产生多条干扰谱线,即是将会有多个假多普勒频率,起到干扰效果。

For the reason that early false Doppler frequency interfering methods towards the Pd radar have some shortcomings,this paper brought forward a new false Doppler frequency interfering method by using the cycle square wave signal.Firstly we Introduced the principle of early false Doppler frequency interfering methods and its deficiencies,then analyzed the specific principle of false Doppler frequency interfering by using the cycle square wave signal. Finally by simulation we verified the feasibility of false Doppler frequency interfering method by using the cycle square wave signal and analyzed the appropriate interference parameter to select. In conclusion,we found that if we use low PRF,small duty ratio,high power cycle square wave signal to modulate echo signal we can produce multiple interference spectral lines between filters of Doppler filter group and the interference effects.