| 应用小波变换于电磁场目标后向散射信号的时频图分析 |
| |
| 引用本文： | 彭玉华,刘亚询.应用小波变换于电磁场目标后向散射信号的时频图分析[J].电子学报,1995,23(9):109-111. |
| |
| 作者姓名： | 彭玉华 刘亚询 |
| |
| 作者单位： | 西安交通大学信息与控制工程系 |
| |
| 摘 要： | 本文将Ｍｏｒｌｅｔ小波用于电磁场后向散射信号的时频分析，为了更好地提高时频分析的时间和频率分辨率，我们对Ｍｏｒｌｅｔ小波进行了改进，并合理地选择尺度的变化规律，数据结果证明无论地同时提高时频分辨率还是抗噪声能力上，改进的Ｍｏｒｌｅｔ小波时频分析都优于短时傅里叶变换和Ｗｉｇｎｅｒ－Ｖｉｌｌｅ分布。
|
| 关 键 词： | 小波变换 时频分析 目标辨识 |
The Application of Wavelet Transform to Time-Frequency Analysis of Transient Electromagnetic Backscatter Signals |
| |
| Peng Yuhua,Liu Yaxun,Wang Yuping, Wang Wenbing.The Application of Wavelet Transform to Time-Frequency Analysis of Transient Electromagnetic Backscatter Signals[J].Acta Electronica Sinica,1995,23(9):109-111. |
| |
| Authors: | Peng Yuhua Liu Yaxun Wang Yuping Wang Wenbing |
| |
| Abstract: | The Morlet wavelet analysis is applied to analyze the time-frequency properties of electromanetic backscattered signals from targets. To improve the time and frequency resolution,we construct a related wavelet with instantaneous frequency that increases linearly with time,and make the scale increase properly. Compared with the conventional short-time Fourier transform and Wigner-Ville distribution, the numerical results show that the wavelet time-frequency analysis provides high time resolution in the early-time high frequency resolution in the late-time,and high detectivity in nolses. |
| |
| Keywords: | Wavelet transform Time-frequency analysis Object detecting |
| 本文献已被 CNKI 维普 等数据库收录！ |
