距离目标像欺骗干扰的效果分析

Analysis of deception jamming effect in range imaging

国外在研与现役雷达大多采用线性调频脉冲压缩技术,为了对其进行有效的欺骗干扰,利用数字射频存储(DRFM)技术,采用时移,幅度加权和移频调制的方法,分别产生静止假目标,整体运动假目标以及有局部运动的假目标,模拟一定信干比条件下的雷达回波与干扰经该类雷达的信号处理过程,对其进行距离速度欺骗。分析当干扰存在时合成目标像位置及运动速度偏离真实目标像位置速度的程度。当干扰能量变大时,合成目标的参数就越接近于干扰假目标的参数,从而隐藏了真实目标的方位与运动状态,取得较好的干扰效果。

The linear frequency modulation signal and the pulse-compressed tech nique have been widely used in model radar. In order to jam effectively the radar, the DRFM technique and the ways of time-shift, weighing and frequency-shift were adopted to produce immobile false targets, moving false targets, and false targets with a few moving parts, respectively. The simulation of jamming signals and echo signals via the signal processing with a certain ratio of energy and deception jamming in range and velocity were analyzed. As the jamming energy grows greater, the parameters of synthetic targets gets much closer to those of jamming targets, so the velocities and sites of the real targets are concealed, and a better jamming effect is obtained.