| 盖强,殷福亮.二维信号Hilbert-Huang变换时频谱研究[J].,2009,(3):445-448 |
| 二维信号Hilbert-Huang变换时频谱研究 |
| Study of 2-dimensional signals time-frequency spectrum of Hilbert-Huang transform |
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| DOI：10.7511/dllgxb200903025 |
| 中文关键词: Hilbert-Huang变换 二维信号 时频谱 |
| 英文关键词: Hilbert-Huang transform 2-dimensional signals time-frequency spectrum |
| 基金项目:中国博士后科学基金资助项目(20060400969). |
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| 摘要点击次数: 1371 |
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| 中文摘要: |
| Hilbert-Huang变换(HHT)自适应时频分析是处理非平稳数据较为有效的新方法．根据一维Hilbert-Huang变换信号时频谱变换原理，研究了二维信号的分解和时频谱分析方法．通过把二维信号按指定方向进行一维分解和时频谱变换，构造出二维信号时间(空间)-频率-能量谱图，使二维信号在指定方向的时频特性能正确地显示出来，从而拓展了Hilbert-Huang变换的应用范围．该方法为分析非平稳二维信号提供了新的工具． |
| 英文摘要: |
| Hilbert-Huang transform (HHT) is a new effective method for processing non-stationary data. According to 1-dimensional Hilbert-Huang transform time-frequency spectrum analyzing principle, 2-dimensional signals time-frequency spectrum analyzing principle of Hilbert-Huang transform is put forward. Through decomposing and time-frequency transforming along a designating direction, a time (space)-frequency-energy distribution of 2-dimensional signals can be got, and the 2-dimensional signals time-frequency characters can be displayed correctly. It makes the Hilbert-Huang transform more universal than it was before. It provides a new tool for processing 2-dimensional non-stationary signals. |
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