二维间歇采样延迟转发SAR干扰技术及其应用

为确保重要目标的信息安全,提出了一种二维间歇采样延迟转发的SAR干扰技术,该技术直接攻击SAR的脉内相干特性,使雷达在干扰机附近的距离向和方位向同时产生多个以主假目标为中心对称分布的逼真假目标串,干扰效果取决于距离向和方位向的采样周期和占空比。因结合延迟转发技术,产生的距离向主假目标和方位向主假目标将不再重叠,且会偏离干扰机的所在位置,既可得到逼真的干扰效果,又保护了干扰机的安全。针对现有文献研究干扰技术多、研究应用少的问题,建立了二维间歇采样转发干扰技术的应用模型,给出了高阶假目标能量补偿的调制系数。仿真实验验证了上述理论和方法的有效性和优越性。

SAR jamming technology based on 2-D intermittent sampling delay repeater and its application

In order to ensure the safety of intelligence in important places, a novel synthetic aperture radar (SAR) jamming technology based on the 2-D intermittent sampling delay repeater is brought forward. This technique uses the intra-pulse coherent characteristic of SAR directly, so it can produce multiple false targets in both the range and the azimuth directions of the jammer nearby. The jamming effect is determined by the sampling period and the duty cycle in the range and the azimuth directions. Due to combination with the time delay repeating technique, the main false targets produced in the range and the azimuth directions will not overlap each other, and will deviate from the position of the jammer. So the jamming effect will not only be vivid, but also protect the jammer. In allusion to the phenomena of focus on the jamming technique but application, the application model of this technique brought forward in this paper is established, which is followed by the modulation factors in energy compensation of high order false targets. The availability and advantage of this method are proved in the simulation experiments.