相干转发干扰对低分辨率雷达回波特征的影响

Influence of Coherent Repeater Jamming on Echo Characteristics of Low-resolution Radar

当前雷达领域的研究愈发深入,提出了大量新型雷达的概念,雷达的分辨率也随着发展得到提高。针对这些新型雷达,电子对抗专家们提出多种新型干扰技术。其中,基于数字射频存储器的相干转发干扰由于易于实现且能获得雷达系统的增益而得到广泛的使用。在干扰与雷达双方都向更新型的体制演进的同时,却忽略了低分辨率雷达仍在全世界范围内大规模列装的现实。较为新型的相干转发干扰样式对低分辨率雷达的影响尚未见有详细的分析。采用信号级仿真的方式,针对目前仍在广泛使用的低分辨率雷达,分析了相干转发干扰对回波特征的影响,重点分析了灵巧噪声干扰、间歇采样转发干扰、多普勒微调干扰这3种代表性相干转发干扰样式对低分辨率雷达回波特征的影响。

At present,the research in the radar field is becoming more and more in-depth,a large number of new radar concepts have been proposed,and the radar resolution has also been improved with the development.In response to these new radars,electronic countermeasure experts have proposed a variety of new jamming technologies.Among them,coherent repeater jamming technology based on digital radio frequency memory is widely used because it is easy to implement and can obtain the gain of radar system.While both jamming and radar are evolving to newer systems,the reality that low-resolution radars are still deployed in large scale all over the world is ignored.The influence of newer coherent repeater jamming patterns on low-resolution radar has not been analyzed in detail.In this paper,aiming at the low-resolution radar still widely used at present,the influence of coherent repeater jamming on echo characteristics is analyzed by means of signal-level simulation,and the influence of three representative coherent repeater jamming patterns,namely smart noise jamming,interrupted sampling repeater jamming and Doppler fine-tuning jamming on the echo characteristics of low-resolution radar is focused on.