基于直升机载雷达告警设备的无源定位技术

Passive Location Technology Based on Helicopter-borne Radar Warning Equipment

直升机载雷达告警设备只具备粗略测向功能,无目标定位能力,实现机载单站无源高精度快速定位是提高电磁态势感知的必要手段。因此,提出一种相关曲线拟合插值方法提高相差/时差测量精度,通过适用不同场景的旋转多普勒定位方法和基于相位差变化率的定位方法的设计,对现有的四通道数字化雷达告警设备的天线组件、微波处理单元和信号处理单元进行软硬件适应性升级改造,实现机载雷达告警设备对辐射源高精度快速无源定位功能。

The helicopter-borne radar warning equipment only has the function of rough direction finding without the capability of target positioning.In order to improve electromagnetic situational awareness,it is necessary to achieve the passive,high-precision and fast positioning of airborne single station.A correlation curve fitting interpolation method is proposed to improve the measurement accuracy of phase difference and time difference.Through the design of the rotating Doppler positioning method applicable to different scenarios and the positioning method based on phase difference change rate,the adaptable upgrade and improvement of the software and hardware is conducted in the antenna components,the microwave processing units and the signal processing units of the existing fourchannel digital radar warning equipment,enabling the passive,high-precision and fast positioning of the airborne radar warning equipment when it is confronted with the radiation source.