基于光纤延时的多域复合雷达干扰方法

Multi-domain Complex Radar Jamming Method Based on Fiber Time Delay

结合光纤延时技术,针对采用线性调频技术的脉冲压缩雷达信号,设计了一种基于光纤延时的多域复合噪声干扰方法。这种方法通过对目标信号在时域上间歇采样与噪声卷积、在频域上固定偏移和光纤延时环路中可控的不同延时处理形成干扰。目标回波经间歇采样后,迅速进行匹配滤波和光纤延时后产生超前于真实目标的假目标。仿真结果显示,基于光纤延时的多域复合噪声干扰方法能够达到预计效果。

Combining fiber time delay technology,aiming at pulse compression radar signal using linear frequency modulation(LFM)technology,this paper designs a multi-domain complex noise jamming method based on fiber time delay.For the target signal,this method performs intermittence sampling and noise convolution in time domain,fixed shift in frequency domain,different time delay processing in fiber time delay loop,thus jamming signal forms.After the target echo is sampled intermittenctly,matching filtering and fiber time delay are fast performed then the false target outstripping true target occurs.The simulation result shows that multi-domain complex noise jamming method based on fiber time delay can reach expected effect.