随机共振理论在雷达信号截获中的应用  

Application of Stochastic Resonance in Radar Signal Interception

作　　者：刘利民[1] 程呈[1] 贾晓东 韩壮志[1] 张亮 

机构地区：[1]军械工程学院 [2]通用装备保障部采购中心军械站 [3]解放军65154部队

出　　处：《火力与指挥控制》2016年第4期99-103,108,共6页Fire Control & Command Control

摘　　要：雷达侦察主要通过无源侦察接收设备对空域中敌方雷达辐射源信号进行检测,若要实现对敌辐射源信号的截获,基本条件就是敌雷达信号能量能够达到雷达信号侦收设备的截获灵敏度。然而现代战场中,电磁环境复杂多变,敌雷达信号往往被干扰信号、噪声等掩盖,导致侦收设备漏警概率提高。针对以上问题,提出基于随机共振原理的雷达信号截获判断的方法,增大了截获信号的输出信噪比,解决了由于噪声过大掩盖的雷达信号的侦收问题。将该方法应用于雷达告警接收机的前端截获部分,大大降低了截获系统的漏警概率,保证了整个截获系统的稳定性。仿真实验验证了该方法的有效性。Radar reconnaissance is to detect enemy radar emitter signals by passive reconnaissance equipment. When the energy of enemy radar signals reach interception sensitivity,it can be thought that signal is unintercepted. However,in the modern battlefield,electromagnetic environment is complex and the enemy radar signals are always covered by noise or interference signals,so the result is false dismissal rate improved. In view of the above problems,a radar signals detection method based on stochastic resonance theory is proposed. The detection problem of signal is covered by excessive noise can be solved. Apply the detection method to front-end intercept in radar warning receiver system,it can reduce the false dismissal rate of system and ensure the system robustness. Simulation results verify the detection method feasibility.

关 键 词：随机共振 雷达信号 前端截获 分数傅里叶变换 信噪比 

分 类 号：TN711.23[电子电信—电路与系统]