OTH雷达MTD与频率捷变兼容问题分析

Analysis of the Compatibility Between MTD and Frequency Agility in OTH Radar

随着电磁环境的日益复杂，要求雷达具有多模式反干扰能力。OTH地波超视距雷达的动目标检测（MTD）系统具有良好的反杂波干扰能力，可以在强杂波干扰背景下，利用回波多普勒信息，提取出所需要的动目标参量，但对来自于敌方的窄带瞄准式干扰无能为力，从而大大限制了其应用；而作为现代电子对抗的产物，采用脉间跳频的频率捷变体制具有极强的反有源干扰能力。本文从OTH雷达信息提取的特点和频率捷变体制的特点出发，就两种反干扰技术在一部雷达中的融合问题以及之间的兼容性问题进行了分析，得出了相关结论。

Along with the complexity of the electromagnetic environment, radars are required to possess the capability of anti-interference with muhimodes. The MTD system of Over The Horizon （OTH） radar is able to extract the moving target parameter making use of the doppler of the echo. However, this system has no means to deal the aiming interference with narrowband,limiting its applications deeply. As the result of modem electronic countermeasures , the system of freqency agility has a strong capability of confonting the active jamming. The issue of fuse and compatibility of the two anti-interference technologies in one radar is analyzed in this paper based the characteristics of information extraction in OTH Radar and the system of frequency agility.