扫频式干扰对超宽带无线电引信干扰机理

Research on Interference Mechanism of Swept-frequency Jamming to UWB Radio Fuze

针对超宽带引信实施干扰,需要在分析超宽带引信的工作原理、瞄准式干扰与扫频式干扰信号特征基础上,构建干扰信号与超宽带无线电引信交互作用模型。以信干比增益为表征参量,解析推导干扰信号作用下超宽带引信从接收干扰信号到接收机相关输出部分的处理增益,并进行仿真实验,理论计算、仿真结果与实验室静态对抗实验结果相吻合。研究结果表明:与点频干扰相比,扫频调幅类干扰是对超宽带无线电引信成功实施干扰的有效敏感波形样式,其中正弦波调幅类干扰效果最优;通过合理设置扫频式干扰参数,可以有效提高干扰效果。

An interference waveform pattern is studied for effective interference to UWB radio fuze.An interaction model of UWB radio fuze and periodically modulated interference signal are established.Based on the signal-to-interference ratio gain,the response characteristics of the fuze are analyzed under different noises,sine-wave amplitude modulation signals,sine-wave frequency modulation(FM)signals,and swept-frequency sinusoidal amplitude modulation(AM)signals.The simulated results are consistent with the theoretical values and verified by laboratory static confrontation tests.The results show that the swept-frequency AM interference is the most effective interference mode,and sine-wave AM interference is the best.By reasonably setting the parameters of the frequency sweep interference,the interference effect can be effectively improved.