一种基于谱连续的极化-多普勒气象雷达信号重构方法  

A method for signal reconstruction of polarization-Doppler weatherradar based on spectral continuity

作　　者：安孟昀 殷加鹏[1] 黄建开 李永祯[1] 王雪松[1] AN Mengyun;YIN Jiapeng;HUANG Jiankai;LI Yongzhen;WANG Xuesong(School of Electronic Science,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学电子科学学院,湖南长沙410073

出　　处：《系统工程与电子技术》2024年第7期2285-2293,共9页Systems Engineering and Electronics

基　　金：国家自然科学基金(61971429,61921001,62171447);博士后国际交流计划引进项目(48132);湖南省科技创新人才计划优秀博士后创新人才项目(2020RC2042)资助课题。

摘　　要：谱极化滤波技术广泛应用于气象雷达杂波抑制中,但是当地杂波与降雨目标混叠时,这些方法在滤除杂波的同时会损失气象信息。针对这一问题,提出一种基于谱连续的极化-多普勒气象雷达信号重构方法。该方法利用气象回波和杂波在距离-多普勒图上的特征差异实现气象目标的保留和杂波的滤除。具体是利用气象目标的多普勒速度和谱宽的空间连续性,采用多项式拟合和高斯拟合的方法补偿降雨区域。业务气象雷达实测数据验证了所提方法的有效性。Spectral polarization filtering technology is widely used in weather radar clutter suppression,but when ground clutter is mixed with precipitation,these methods will lose precipitation while filtering out clutter.To address this issue,a polarization-Doppler weather radar signal reconstruction method based on spectral continuity is proposed.This method utilizes the characteristic differences between precipitation and clutter on the range-Doppler map to achieve the preservation of precipitation and the filtering of clutter.Specifically,the spatial continuity of Doppler velocity and spectral width of precipitation is utilized to compensate for precipitation using polynomial fitting and Gaussian fitting method.The effectiveness of the proposed method is verified by the measured data of the operational weather radar.

关 键 词：极化-多普勒气象雷达 杂波抑制 信号恢复 谱连续 

分 类 号：TN95[电子电信—信号与信息处理]