CAJ | 학술논문

针对LFM脉冲压缩雷达回波信号距离和多普勒频率存在耦合这一特点，在阶梯波移频干扰的基础上，提出了随机移频的干扰方法。在雷达回波信号中心频率正负二分之一带宽内附加随机的多普勒移频分量，可产生分布在真实目标周围的随机假目标。随机移频干扰技术产生的假目标随机性强，使得雷达无法通过假目标频率补偿得出真实目标的位置，并且随机移频产生的假目标相对于雷达是部分适配的，因此假目标在一定程度上会展宽，当附加随机移频点接近于雷达中心频率时，产生的假目标甚至可以覆盖真实目标，从而达到较好的干扰效果。
침대LFM맥충압축뢰체회파신호거리화다보륵빈솔존재우합저일특점，재계제파이빈간우적기출상，제출료수궤이빈적간우방법。재뢰체회파신호중심빈솔정부이분지일대관내부가수궤적다보륵이빈분량，가산생분포재진실목표주위적수궤가목표。수궤이빈간우기술산생적가목표수궤성강，사득뢰체무법통과가목표빈솔보상득출진실목표적위치，병차수궤이빈산생적가목표상대우뢰체시부분괄배적，인차가목표재일정정도상회전관，당부가수궤이빈점접근우뢰체중심빈솔시，산생적가목표심지가이복개진실목표，종이체도교호적간우효과。
LFM radar signal has coupling between the range and Doppler frequency .Based on the method of ladder wave jamming,a method of random frequency-shift jamming was proposed .Random Doppler frequency-shift component was added in center frequency bandwidth of the positive and negative half ,and false targets could be generated,randomly distributed around the real target .Random frequency-shifting technique has high randomness,thus the radar can't obtain the position of the real target through frequency compensation of multi-false-target.The false-target generated by random frequency-shifting is partially adaptive to the radar,thus the false-target range can be broadened .When the random frequency-shifting is close to radar's center frequency,the generated false-targets can even cover the real-target and achieve very good effect .