高频地波雷达抗雷电干扰研究

A STUDY OF HF GW RADAR SUPPRESSING LIGHTNING INTERFERENCE

高频地波雷达（ＨＦ－ＧＷＲａｄａｒ）作为探测超视距目标的有效手段在海防武器系统中担当重要的角色。高频段电磁环境恶劣，近区雷电在这一频段激发的天电噪声对ＨＦ－ＧＷ雷达的正常工作构成了严重干扰。通过分析雷电在ＨＦ－ＧＷ雷达多普勒域表现的奇异性，本文提出了利用小波变换在多普勒域检测雷电干扰的方法和一种抑制雷电干扰的方案。

High frequency ground wave radar as an effective indicator of the over the horizon targets plays an important role in the coast defense system.High frequency band is a hostile electromagnetic environment.In this band atmospheric noise emitted by lightning in a short distance may badly affect HF GW radar's normal function.Analyzing the lightning's singularity showed in the Doppler domain of HF GW radar,this paper presents a method to detect lightning interference in Doppler domain using wavelet transform and a scheme to suppress lightning interference.Experiments show that the anti lightning ability of HF GW radar is enhanced.