间歇采样灵巧噪声重复转发干扰研究

Research on Smart Noise Jamming Based on Interrupted-Sampling and Periodic Repeater Techniques

为研究如何对线性调频脉冲压缩雷达进行有效干扰,针对间歇采样重复转发干扰假目标分布相对均匀易被雷达识别、次假目标群衰减较大等问题,提出一种间歇采样灵巧噪声重复转发干扰。首先,从理论上分析了基于间歇采样的灵巧噪声重复转发干扰效果,然后进行了仿真实验。结合理论分析和仿真实验结果可知,间歇采样灵巧噪声转发干扰在具备原间歇采样重复转发干扰特性的基础上,使假目标幅度和分布随机,不易被雷达识别。同时,通过灵巧噪声卷积调制,干扰无需测频自动瞄准雷达信号,干扰能量利用率高,明显优于传统的射频噪声干扰;通过调节噪声时宽,可以有效选择进行欺骗干扰或压制干扰,干扰方式较为灵活。

In order to study how to make effective jamming to linear frequency modulated pulse compression radar,a kind of interrupted-sampling smart noise periodic repeater jamming is proposed to solve the problems that the false targets are distributed evenly and easily identified by radars and the secondary target groups are attenuated quickly for interrupted-sampling periodic repeater jamming.First of all,the effect of periodic repeater jamming of smart noise has been studied theoretically based on interrupted-sampling and then the simulation experiment is carried out.Combining the theoretical analysis and simulation results,it can be seen that the jamming not only has the characteristics of the original interrupted-sampling periodic repeater jamming,but also can make the false targets and their amplitude distributed randomly,rendering radar recognition more challenging.At the same time,through the smart noise convolution modulation,the jamming can automatically zero in on the radar signal without measuring frequency,hence having higher utilization ratio of the jamming energy,which is significantly better than the traditional RF noise jamming.Furthermore,noise time width adjustment contributes to flexible transition between deceptive jamming and suppressive jamming.