基于间歇采样的正弦加权调频干扰研究

Sinusoidal Weighted Frequency Modulation Jamming Technique Based on Intermittent-sampling Repeater

针对间歇采样转发干扰样式单一,干扰滞后等缺点,采用将调频干扰与其结合的方法,提出一种针对线性调频信号的新的干扰样式。阐述了间歇采样转发干扰和正弦加权调频干扰的基本原理。分析了影响干扰效果的关键参数,对假目标的空间分布特点进行了研究,指出决定干扰空间覆盖范围和形成多假目标干扰或压制干扰的关键因素。结果表明,通过对采样信号进行加权调频来控制干扰的空间分布特性和干扰效果,解决了干扰信号滞后的问题,且干扰样式随干扰参数的改变灵活变化。这种干扰样式能对雷达进行有效干扰,仿真结果验证了理论分析的正确性。

A new jamming technology for linear frequency modulation signal was presented in the paper. We used the method which combines weighted frequency modulated jamming with intermittent-sampling,to overcome the disadvantages of intermittent-sampling repeater jamming. The principles of intermittent-sampling repeater jamming and weighted frequency modulated jamming were introduced. The effect of key parameters on the jamming effectiveness was discussed. The characteristic of false targets＇ spatial distribution was studied. The key factors that determine multiple false targets or suppress interference were discussed in detail. The distribution and jamming effectiveness can be controlled by weighted frequency modulation with the sampling signal,and the problem of interference signal delay was solved. The jamming type can be changed by flexibly utilizing jamming parameters. This new jamming technology is effective for linear frequency modulated radar. Simulation results validate the correctness of theoretical analysis.