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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。
Aiming at the characteristics of the LFM radar transmitting signal, a new adaptive jamming technique called triangular wave weighted FM interference is proposed. The jammer modulates the received radar signal by triangular wave frequency modulation and then amplifies the signal and forwards the amplified signal. The specific interference mechanism is described, and the time-frequency characteristics and interference effects of the interference signal are analyzed. The analysis results show that the deceptive and obscure interference effects can be achieved under different modulation parameters, and the coherence of the interference signal and the transmitted signal can obtain the pulse compression gain, thereby reducing the power requirement. Finally, the simulation experiment proves the correctness and feasibility of theoretical analysis.