| 基于图像处理的Wigner-Ville分布交叉项抑制 |
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| 引用本文： | 赵培洪,平殿发,邓兵,徐小毛. 基于图像处理的Wigner-Ville分布交叉项抑制[J]. 电子测量技术, 2009, 32(7): 146-148 |
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| 作者姓名： | 赵培洪 平殿发 邓兵 徐小毛 |
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| 作者单位： | 海军航空工程学院电子信息工程系,烟台,264001;海军航空工程学院电子信息工程系,烟台,264001;海军航空工程学院电子信息工程系,烟台,264001;海军航空工程学院电子信息工程系,烟台,264001 |
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| 摘 要： | 将图像处理技术同Wigner-Ville分布相结合得到一种新的交叉项抑制方法。先对信号做伪Wigner-Ville变换，然后对时频图旋转一定角度，再逆方向旋转相同的角度，则此时信号的时频分布在交叉项地方存在明显的偏差；利用这种偏差检测到交叉项，最后设计二值滤波将交叉项滤去，得到没有交叉项的信号时频表示。仿真结果表明了该方法的有效性。
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| 关 键 词： | 时频分析 伪Wigner分布 交叉项 图像处理 |
Cross-terms suppression in Wigner-Ville distribution based on image processing |
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| Zhao Peihong,Ping Dianfa,Deng Bing,Xu Xiaomao. Cross-terms suppression in Wigner-Ville distribution based on image processing[J]. Electronic Measurement Technology, 2009, 32(7): 146-148 |
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| Authors: | Zhao Peihong Ping Dianfa Deng Bing Xu Xiaomao |
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| Affiliation: | Dept.of Electronic and Information Engineering;Naval Aeronautical and Astronautical University;Yantai 264001 |
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| Abstract: | After combining with image processing technology and Wigner-Ville distribution,we can obtain a new method of cross-term suppression. Fist we make pseudo-Wigner transform towards signal ,then rotate the time-frequency figure according to some angle and revole the same angle by adverse direction. So the time-frequency distribution of these two exist obvious mismatch,and the cross-terms can be detected using this mismatch. Finall,the cross-termswill be removed through designing a filter of 2-value,the new time... |
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| Keywords: | time-frequency analysis pseudo-Wigner distribution cross-terms image processing |
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