| 基于希尔伯特-黄变换的激光云高仪后向散射信号去噪方法 |
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| 引用本文： | 何俊峰,刘文清,张玉钧,陈臻懿,阮俊,王立明.基于希尔伯特-黄变换的激光云高仪后向散射信号去噪方法[J].光学学报,2011(2):9-18. |
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| 作者姓名： | 何俊峰 刘文清 张玉钧 陈臻懿 阮俊 王立明 |
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| 作者单位： | 中国科学院安徽光学精密机械研究所环境光学与技术重点实验室; |
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| 基金项目： | 公益性行业(气象)科研专项基金(GYHY200706023)资助课题 |
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| 摘 要： | 基于希尔伯特-黄变换(HHT)和Savitzky-Golay滤波,提出了一种结合HHT时频分析的半导体激光云高仪后向散射信号去噪方法.该方法在对云高仪后向散射信号的噪声特性及传统去噪方法的缺陷进行研究的基础上,选择截止分量阶一定的自适应时变时空滤波器组(TFB)结构并辅助Savitzky-Golay滤波抑制噪声,最后利...
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| 关 键 词： | 大气光学 希尔伯特-黄变换 激光云高仪 后向散射信号 Savitzky-Golay滤波 |
A Denoising Method for Backscatter Signal of Laser Ceilometer Based on Hilbert-Huang Transform |
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| He Junfeng Liu Wenqing Zhang Yujun Chen Zhenyi Ruan Jun Wang Liming.A Denoising Method for Backscatter Signal of Laser Ceilometer Based on Hilbert-Huang Transform[J].Acta Optica Sinica,2011(2):9-18. |
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| Authors: | He Junfeng Liu Wenqing Zhang Yujun Chen Zhenyi Ruan Jun Wang Liming |
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| Institution: | He Junfeng Liu Wenqing Zhang Yujun Chen Zhenyi Ruan Jun Wang Liming(Key Laboral of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Science,Hefei,Anhui 230031,China) |
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| Abstract: | A denoising method combined with Hilbert-Huang transform(HHT) time-frequency analysis for backscatter signal of laser diode ceilometer based on HHT and Savitzky-Golay filtering is proposed.Considering characteristics of ceilometer backscatter signal proper structure of adaptive time-variant time-space filtering bank(TFB) assisted by Savitzky-Golay filtering is selected to suppress noise.Then,HHT time-frequency analysis is used to observe signal features and test denoising effect.It is proved by plenty of te... |
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| Keywords: | atmospheric optics Hilbert-Huang transform laser ceilometer backscatter signal Savitzky-Golay filtering |
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