天气雷达降水回波信号特征研究  

A Study on Weather Radar Precipitation Echo Signal Characteristics

作　　者：张振仟 胡明宝[1,2] 孟鑫[1] 魏浩[1] 

机构地区：[1]解放军理工大学气象海洋学院,南京211101 [2]南京气象雷达开放实验室,南京210008

出　　处：《现代雷达》2016年第9期12-16,共5页Modern Radar

摘　　要：引入偏斜度、峰度、均方差等三个信号特征参数,对天气雷达获取的大量降水回波信号的多普勒频谱进行分析。初步研究结果显示:降水回波信号的多普勒频谱分布与回波谱宽大小有关,当回波速度谱宽大于3.5 m/s时,降水回波信号多普勒频谱与高斯谱偏差较大;当回波速度谱宽小于3.5 m/s时,降水回波信号多普勒频谱与高斯谱非常接近。Aiming at analyzing a large number of Doppler spectra of real precipitation signal, introduce three signal feature parameters, including of skewness, kurtosis, and mean square error, the result indicated： the precipitation signal Doppler spectral shape is associated with echo spectrum width, when the velocity spectrum width is more than 3.5 m/s, the Doppler spectra shape is not Gaussian ; when the velocity spectrum width is less than 3.5 m/s, the Doppler spectra shape is close to the fitted Gaussian curve.

关 键 词：天气雷达 信号处理 降水回波信号多普勒频谱 非高斯谱 

分 类 号：TN959.4[电子电信—信号与信息处理]