| 小波变换用于Wigner-Ville分布交叉项的抑制 |
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| 引用本文： | 傅海威,傅君眉. 小波变换用于Wigner-Ville分布交叉项的抑制[J]. 西安石油大学学报(自然科学版), 2001, 16(5): 37-39 |
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| 作者姓名： | 傅海威 傅君眉 |
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| 作者单位： | 1. 西安石油学院信息科学系,
2. 西安交通大学电信学院, |
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| 基金项目： | 国家自然科学基金项目(4997426) |
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| 摘 要： | 基于 Wingner- Ville分布良好的时频性质 ,针对它的交叉项的高频振荡特性 ,利用二维张量积小波对信号的 Wigner- Ville分布进行分解 ,用低频系数重构时频图 ,使交叉项干扰受到抑制 ,并就以 4个高斯包络正弦信号和 Wigner- Ville分布为例 ,用双正交小波作分解和重构说明了交叉项抑制的方法和过程 .数值计算表明 ,该方法对交叉项的抑制优于伪 Wigner- Ville分布
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| 关 键 词： | 小波变换 时频分布 Wigner-Vill分布 干扰项 |
| 文章编号： | 1001-3361(2001)05-0037-03 |
| 修稿时间： | 2001-02-20 |
Applying Wavelet Transform to the Suppression of the Interference-terms of Wigner-Ville Distribution |
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| FU Hai wei,FU Jun mei. Applying Wavelet Transform to the Suppression of the Interference-terms of Wigner-Ville Distribution[J]. Journal of Xian Shiyou University, 2001, 16(5): 37-39 |
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| Authors: | FU Hai wei FU Jun mei |
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| Abstract: | Wingner Ville distribution has good time frequency characteristic. Its interference terms are oscillatory at high frequency. But after Wigner Ville distribution of a signal is decomposed and reconstructed by 2D tensor product wavelet analysis, the interference terms can be suppressed. The method is stated in detail. And an example is presented for illustrating the application of it. The result of the example shows that the method is very effective. |
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| Keywords: | wavelet transform time frequency distribution Wigner Ville distribution interference terms |
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