现代雷达2016，Vol.38Issue(5)：33-36,57,5.DOI:10.16592/j.cnki.1004-7859.2016.05.009
提高天气雷达探测能力的互相关方法和中值滤波技术
Cross CorrelationM ethod and Median Filtering Technology for En hancing Detection Capabiliyt in Weather Radar
摘要
Abstract
The method using dual polarization weather radar to detect the signal has interested meteorological science and technology personnel at home and abroad .Dual channel transceiver system of dual polarization weather radar devides transmission channel into horizontal and vertical way by power divider .So energy of each channel will be cut in half and the echo signal energy will decrease a -bout 3 dB.In order to avoid the negative influence of 3 dB loss, the dual polarization radar detection performance should be im-proved.The sum of the cross-correlation estimates as well as the power and autocorrelation from each of the dual -polarization returns should be gained.If the sum exceeds a predetermined threshold ,the signal will be considered present .Otherwise,the data are consid-ered to be noise and are censored .Based on the X -band dual polarization radar data , the detection effect with and without cross-cor-relation algorithm is constracted ,and the sum of three portion is proved to be the best method for deciding signal present .In addition, median filtering technology is used to censor point clutter ,and improve signal detection in dual polarization weather radars .关键词
双偏振天气雷达/互相关方法/中值滤波/点杂波/气象探测/信号与信息处理Key words
dual polarization weather radar/coherence method/median filtering technology/point clutter/meteorological detec-tion/signal and information processing分类
信息技术与安全科学引用本文复制引用
雷亚会,史朝..提高天气雷达探测能力的互相关方法和中值滤波技术[J].现代雷达,2016,38(5):33-36,57,5.基金项目
国家自然科学基金资助项目 （）
