脉内步进频信号非均匀间歇转发干扰特性研究

Research on Non-uniform Intermittent Forwarding Interference Characteristics of Intra-pulse Step Frequency Signal

随着数字射频存储技术的快速发展,间歇采样转发干扰凭借其突出的欺骗和压制效果,在实际的干扰场景中有广泛的运用,对雷达的识别和探测造成了严重的威胁。区别于常规的均匀间歇干扰,采样信号非均匀的样式进一步拓展了干扰的灵活性和欺骗性,对雷达有更明显的干扰压制效果。通过研究雷达发射脉内步进频信号和非均匀间歇采样转发干扰类型的产生机理,对其脉压后的时频特性进行分析,最后通过仿真实验对脉内捷变步进频受到非均匀间歇采样干扰的效果进行验证。

With the rapid development of DRFM technology,and its outstanding deception and suppression effect,intermittent sampling and forwarding interference has been widely used in actual interference scenarios,which poses a serious threat to radar identification and detection.The non-uniform pattern of the sampling signal further expands the flexibility and deception of interference,and has a more obvious interference suppression effect on radar which is different from the conventional uniform intermittent interference.Through studying the generation mechanism of the in-pulse step frequency signal and non-uniform intermittent sampling and forwarding interference types in the radar transmission,this paper analyzes the timefrequency characteristics after pulse pressure.Finally,the degree of in-pulse agile step frequency interfered by non-uniform intermittent sampling is verified by simulation experiments.