| 基于Sobel算子实现WVD交叉项的衰减 |
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| 引用本文： | 牛萌,刘光斌,刘冬.基于Sobel算子实现WVD交叉项的衰减[J].宇航计测技术,2007,27(2):38-40. |
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| 作者姓名： | 牛萌 刘光斌 刘冬 |
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| 作者单位： | 第二炮兵工程学院,西安,710025 |
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| 摘 要： | 针对在分析多分量信号时,WVD的交叉项使得时频分布图变得难于解释,提出了一种基于Sobel算子的WVD交叉项衰减方法。该方法首先利用模糊函数将信号聚集在原点附近,再利用Sobel算子作为滤波算子,对AF进行滤波,最后通过二维傅里叶变换,得到交叉项衰减后的WVD。实验结果证明该方法可以很好的抑制WVD交叉项。
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| 关 键 词： | Sobel算子 模糊函数 交叉项 傅里叶变换 |
| 文章编号： | 1000-7202(2007)02-0038-03 |
| 修稿时间： | 2006年8月11日 |
Sobel Operator Based Cross-Terms Attenuation in the Wigner-Ville Distribution |
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| NIU Meng,LIU Guang-bin,LIU Dong.Sobel Operator Based Cross-Terms Attenuation in the Wigner-Ville Distribution[J].Journal of Astronautic Metrology and Measurement,2007,27(2):38-40. |
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| Authors: | NIU Meng LIU Guang-bin LIU Dong |
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| Abstract: | As to multi-signals,the figure of time-frequency distribution becomes difficult to understand due to cross-terms in the Wigner-Ville distribution(WVD),a method of cross-terms attenuation in the WVD based on Sobel operator is proposed.Firstly signals gather round the origin with Ambiguity Function(AF),secondly AF is filtered with Sobel operator as filter operator.Finally the WVD with cross-term attenuation is obtained by 2-D Fourier transformation.Experiments demonstrate the efficiency of the method in cross-term suppression in the WVD. |
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| Keywords: | WVD |
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