基于三角波调制的加权调频干扰技术研究

针对线性调频雷达发射信号特点,提出一种新的应答式干扰技术—三角波加权调频干扰,即干扰机利用三角波频率调制接收到的雷达信号,再经放大之后转发出去。阐述了具体的干扰机理,分析了干扰信号的时频特性和干扰效果。分析结果表明:不同调制参数条件下可以达到欺骗性和遮盖性干扰效果,且干扰信号与发射信号具有相干性可以获得脉压增益,从而降低功率要求。最后通过仿真实验证明了理论分析的正确性和可行性。

A Study on Technique of Weighted Frequency Modulated Jamming Based on Triangle Wave Modulation

According to the characteristics of the linear frequency modulation radar transmit signal, a new kind of jamming technique is proposed and named as triangle wave weighted frequency modulated jamming. The jamming machines receive the radar signal and modulate it in the frequency domain by triangle wave, then it is transmitted after enlarge. The specific interference mechanism is stated, the time-frequency characteristics and jamming effects is analyzed. It shows that the interference signal can produce the deception and masking double jamming effects under the change of parameters, it is similar to the radar signal that it is coherent in the pulse, therefore it can obtain the processing gain and reduce the power requirements. The correctness and feasibility of this technique is proved by simulation experiment at last.