| 小波变换和傅立叶变换在信号频率分析中的比较 |
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| 引用本文： | 刘海忠.小波变换和傅立叶变换在信号频率分析中的比较[J].天水师范学院学报,2005,25(5):29-30. |
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| 作者姓名： | 刘海忠 |
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| 作者单位： | 兰州交通大学,数理与软件工程学院,甘肃,兰州,730070 |
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| 摘 要： | 小波变换和傅立叶变换都是信号频率分析的有力工具,本文通过两者对模拟信号的频率分析,比较了两者的优缺点:傅立叶变换分辨率较高,不能同时提供时频信息的;小波变换分析信号频率时可以时间频率同时定位,但是需要选择合适的母小波,处理较复杂。
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| 关 键 词： | 小波变换 傅立叶变换 信号频率 |
| 文章编号： | 1371-1351(2005)05-0029-02 |
| 修稿时间： | 2005年6月12日 |
Comparison of wavelet transform and Fourier transform in analyzing signal frequency |
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| LIU Hai-zhong.Comparison of wavelet transform and Fourier transform in analyzing signal frequency[J].Journal of Tianshui Normal University,2005,25(5):29-30. |
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| Authors: | LIU Hai-zhong |
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| Abstract: | Wavelet transform and Fourier transform are both strong tools for frequency analysis of signal frequency. This paper compared their advantage and shortcoming by analyzing frequency of a simulated signal with the two techniques, Fourier transform had higher resolution, it didn't provide time and frequency information at the same time; wavelet transform could located both time and frequency, but it need select mother wavelet and had more steps in its procession. |
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| Keywords: | wavelet transform fourier transform signal frequency |
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