超分辨率处理技术在多普勒天气雷达中的应用探究  

Discuss of the Application of Super-resolution Technique in Doppler Weather Radar

作　　者：何建新[1,2] 李学华[1,2] 

机构地区：[1]成都信息工程学院电子工程学院,四川成都610225 [2]中国气象局大气探测重点开放实验室,四川成都610225

出　　处：《成都信息工程学院学报》2013年第1期1-7,共7页Journal of Chengdu University of Information Technology

基　　金：国家自然科学基金资助项目(41075010);四川省教育厅重大培育资助项目(11ZZ015)

摘　　要：超分辨率处理技术有利于提高天气雷达对中小尺度气旋和龙卷风等灾害性天气探测能力,有利于天气雷达获得更精细的天气过程回波特征。文中分析了多普勒天气雷达实现超分辨率的工作原理及一些实际应用问题;针对其中谱矩估计精度降低的问题,提出采用距离过采样和白化算法的解决方法,并给出白化滤波器的设计方法和白化后的谱矩估计算法。雷达仿真和实际数据试验表明,结合距离过采样及白化技术,超分辨率技术在多普勒天气雷达中的应用是可行的。Super resolution processing technology can be beneficial to improve the severe weather detection ability of the weather radar for small-scale mesocyclone and tornado, and is also helpful for weather radar to get much finer characteristics of weather echo. In this paper, the method of super resolution technique and its problem for applica- tion have been analyzed. Aiming at the decrease of the accuracy in spectral estimation, a method of range oversam- pling and whitening technique has been proposed to resolve it and the detailed design of whitening filter and the algo- rithm of spectral estimation after whitening has been given in this paper. Experiments of simulated data and radar ac- tual data have tested the supper-resolution technique combined with range oversampling and whitening technique is feasible in application of Doppler weather radar.

关 键 词：超分辨率 距离过采样 白化算法 多普勤天气雷达 

分 类 号：TN959.4[电子电信—信号与信息处理]