基于空间谱估计的闪电定位算法研究与分析

为了减少闪电对人类生命财产和各种电子设备造成的损失,同时研究雷暴活动的形成机制,并为闪电监测预警提供技术支持,开展闪电定位算法研究具有重要意义。闪电发生时辐射从极低频到甚高频范围的电磁脉冲,通过闪电定位系统获取闪电辐射源脉冲信号参数便可定位闪电。概述了闪电定位原理及基本方法,比较了基于空间谱估计的Capon算法、MUSIC算法及2种改良算法,介绍了基于均匀圆阵的二维MUSIC算法。采用Matlab分析了这几种闪电定位算法的性能,最后提出二维修正MUSIC算法,为闪电定位系统提供坚实的理论依据。

Lightning Location Algorithms Research and Analysis based on Spatial Spectrum Estimation

In order to reduce the loss of life,property and a variety of electronic devices damage caused by lightning,and to study the formation mechanism of thunderstorm activity so as to provide a technical support to the lightning monitoring and early warning,it has great significance to study the lightning location algorithm.When Lightning occurs,it exposure electromagnetic pulse ranges from very low to very high frequency.We can acquire the parameters of the lightning radiation pulse signal of the lightning system to locate its position.This paper summarizes the basic principles and methods of lightning location,focusing on comparing Capon algorithm,MUSIC algorithm and its two modified algorithm based on spatial spectrum estimation,and introduces the 2-D MUSIC algorithm based on uniform circular array.It uses Matlab to analyze the performance of these lightning location algorithms.Finally,the paper puts forwards the 2-D modified MUSIC algorithm,providing a solid theoretical basis for lightning location system.