伪码无线电引信抗有源干扰分析

The Study on Active Jamming of Pseudorandom Code Radio Fuze

设计了伪随机编码调相无线电引信电路,分析了该引信的工作原理。通过有源干扰信号和伪码信号的互相关特性与伪码信号互相关函数对比,从理论上得出当干扰信号早于目标回波信号作用于引信时,只有干扰机发射的信号和引信发射的信号完全一致,引信才能误动作,其他情况下都不会对引信构成威胁。当干扰信号和目标回波信号同时作用于引信时,只要干扰信号的载波频率同引信的载波频率,有可能使引信瞎火。

Designs the circuit of pseudorandom code phase modulation radio fuze, and studies the characteristics of this fuze. According to the contrast on cross correlation characteristics and coefficient of active jamming signal and pseudorandom code signal, in theory when the fuze receives the jamming early than the target echo signal, the jamming signal which has the same carrier frequency and the same modulating signal will have big influence on fuze, others can be ignored. When the fuze receives the jamming along with the target echo signal., the jamming signal that has the same carrier frequency will have big influence on fuze.