回波功率筛选与数字地表分类数据辅助的低空风切变风速估计方法  

Echo Power Screening and Digital Land Classification Data-assisted Wind Speed Estimation of Low-altitude Wind-shear

作　　者：李海[1] 宋迪 程伟杰 王杰 LI Hai;SONG Di;CHENG Weijie;WANG Jie(Tianjin Key Laboratory for Advanced Signal Processing,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学天津市智能信号与图像处理重点实验室,天津300300

出　　处：《电子与信息学报》2021年第8期2286-2291,共6页Journal of Electronics & Information Technology

基　　金：民机项目(MJ-2018-S-28);天津市自然基金(20JCZDJC00490);航空基金项目(20182067008);中央高校基本科研业务费项目(3122018D008);中国民航大学蓝天教学名师培养经费。

摘　　要：针对非均匀杂波环境下,低空风切变风速估计不准的问题,该文提出一种回波功率筛选与数字地表分类数据(DLCD)辅助的低空风切变风速估计方法。该方法首先利用样本回波功率对训练样本进行初选,然后利用DLCD计算各样本间的相似度,并从功率较大的训练样本中选取样本相似度较高的训练样本估计待测距离单元的杂波协方差矩阵,最后利用广义相邻多波束(GMB)-局域联合处理(JDL)的方法实现低空风切变风速的有效估计。In order to solve the problem of inaccurate estimation of low-altitude wind-shear wind speed under non-uniform clutter environment,a kind of low-altitude wind-shear wind speed estimation method based on echo power screening and Digital Land Classification Data(DLCD)-assisted is proposed.The method firstly uses the sample echo power to select initially the training samples,then uses the DLCD to calculate the similarity between the samples,and selects the training samples with higher sample similarity from the higherpowered training samples to estimate the clutter covariance matrix,finally uses the Generalized adjacent Multiple-Beam(GMB)-Joint Domain Localized(JDL)method to achieve wind speed effective estimation of low-altitude wind-shear.

关 键 词：风速估计 低空风切变 非均匀杂波 回波功率筛选 数字地表分类数据 

分 类 号：TN959.4[电子电信—信号与信息处理]