一种低截获概率雷达的移频干扰研究

摘要

A combined modulation LPI radar signal-frequency modulated continuous wave-phase shift keying (FMCW-PSK) was designed ,and the effect to matched filtering of the two characteristics ,carrier frequency and frequency rate of the signal were analyzed .Starting from these two characteristic ,their changes on the radar signal's jamming were studied .The false Doppler shift-frequency jamming on radar signals influence and jamming effects were analyzed in detail .Based on this an improved method was proposed ,which was sawtooth wave frequency-shift jamming ,and a detailed theoretical analysis and simulation was given .The results showed that the jamming can achieve better results ,verified the shift frequency jamming was an effective jamming method to the low probability of intercept radar .%设计了一种调频连续波-相移键控复合调制的低截获概率雷达信号，并分析了频率、调频斜率两个特征对信号匹配滤波的影响。从这两个特征入手研究利用特征变化对雷达信号的干扰。详细分析了假多普勒移频干扰对雷达信号的影响和干扰效果，在此基础上提出了锯齿波移频改进干扰方法，并给出了仿真实验，结果表明可以实现较好的干扰效果，验证了移频干扰是对低截获概率雷达的一种有效干扰。