| 基于FRFT及Wigner—Hough变换的非平稳信号时频分析 |
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| 引用本文： | 韩俊,王茜,秦开宇. 基于FRFT及Wigner—Hough变换的非平稳信号时频分析[J]. 自动化信息, 2012, 0(5): 48-50 |
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| 作者姓名： | 韩俊 王茜 秦开宇 |
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| 作者单位： | 电子科技大学空天科学技术研究院,成都611731 |
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| 摘 要： | 考虑到时频分析在非平稳信号处理中的广泛应用，本文比较了几种常用的时频分析技术，提出了一种基于分数傅里叶变换和Wigner-Hough变换的非平稳信号时频分析方式。仿真实验结果表明，基于分数阶傅里叶变换和Wigner—Hough变换的方法较之常用的二次型时频分布不同的是它消除了交叉项的干扰，同时也很容易估计参数，分析信号的瞬时频率，恢复信号的信息。
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| 关 键 词： | 时频分析 分数阶傅里叶变换 Wigner—Hough变换 非平稳信号 |
The Time-frequency Analysis of Non-stationary Signal Based on FRFT and Wigner-Hough Transform |
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| HAN Jun,WANG Qian,QIN Kai-yu. The Time-frequency Analysis of Non-stationary Signal Based on FRFT and Wigner-Hough Transform[J]. Automation Information, 2012, 0(5): 48-50 |
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| Authors: | HAN Jun WANG Qian QIN Kai-yu |
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| Affiliation: | (Institute of Astronautics and Aeronautics, University of Electronic Science and Technology of China, Chengdu 611731, China) |
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| Abstract: | Taking into account the widespread use of the time-frequency analysis in non-stationary signals processing, the sev- eral common time-frequency analysis techniques are compared with each other, and a method of time-frequency analysis of non-sta- tionary signal based on Fractional Fourier Transform （FRFT） and Wigner-Hough Transform is proposed in this paper. The simulation experiment results show that comparing the method of non-stationary signal time-frequency analysis based on FRFT and the Wigner- Hough Transform with the method of commonly used quadratic time-frequency distribution, the difference between them is that the interference of the cross term has been eliminated, meanwhile, it also easily estimates the parameters, analyzes the instantaneous fre- quency of the signal, and restores the phase information. |
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| Keywords: | Time-frequency Analysis Fractional Fourier Transform Wigner-Hough Transform Non-stationary Signal |
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