对LFM-PC雷达的分布式合成欺骗干扰效果分析

以线性调频脉冲压缩(LFM-PC)雷达为例，研究了3种典型欺骗干扰(直接延迟转发、间歇采样干扰、移频干扰)对雷达测距和测角的影响机理。通过控制干扰机幅度、相位和延迟时间，可对雷达产生相干和非相干的合成欺骗干扰效果。信号级仿真表明，通过控制时延和频率，可在距离维产生大量假目标，形成距离欺骗效果；通过控制幅度和相位时延可在角度维形成多点源干扰，形成角度欺骗效果，这是分布式集群干扰的独特优势。3种干扰样式中，直接转发干扰和移频干扰更容易形成角度欺骗效果；间歇采样由于固有的间歇性，在距离维较容易形成欺骗干扰，而角度维的干扰效果稍差一些。

Analysis of the effect on distributed synthetic deception jamming to LFM-PC radar

Linear Frequency Modulation Pulse Compression(LFM-PC) radar is taken as an example to study the influence mechanism of three typical deception jamming(direct delay forwarding jamming, the interrupted-sampling and repeater jamming, frequency-shifting jamming) on the ranging and angle measurement of radar. By controlling the amplitude, phase and delay of the jammer, it can produce coherent and non-coherent synthetic deception jamming on the radar. Signal level simulation shows that by controlling the delay and frequency, a large number of false targets can be generated in the distance dimension to form a distance deception effect. By controlling the amplitude and phase delay, multi-source jamming can be formed in the angle dimension to form the angle deception effect, which is the unique advantage of distributed cluster jamming. Among the three jamming patterns, direct delay forwarding jamming and frequency-shifting jamming is more likely to form angle deception effects; the interrupted- sampling and repeater jamming is more likely to form deception jamming in the distance dimension due to the inherent intermittentness, and the angular dimension interference effect is slightly worse.