| 一种抑制时频分布交叉项的新方法 |
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| 引用本文： | 王勇,姜义成. 一种抑制时频分布交叉项的新方法[J]. 电子学报, 2008, 36(Z1): 161-165 |
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| 作者姓名： | 王勇 姜义成 |
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| 作者单位： | 哈尔滨工业大学电子工程技术研究所,黑龙江哈尔滨,150001 |
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| 基金项目： | 教育部博士点基金(No.20060213009) |
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| 摘 要： | 提出一种抑制时频分布交叉项的新方法,该方法在Wigner-Ville分布(WVD)的基础上,引入一相位校正函数,可抑制信号的非线性导致的自交叉项影响.对于多分量信号,文中采用洁净(CLEAN)技术对每个信号分量进行带通滤波,抑制了信号分量间的互交叉项影响.该方法在抑制时频分布交叉项的同时,保持着较高的时频聚集性,计算机仿真实验验证了本文算法的有效性.
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| 关 键 词： | 交叉项 相位校正函数 洁净技术 时频聚集性 |
| 收稿时间： | 2006-10-20 |
A New Method for Restrain the Cross-terms of Time-Frequency Distributions |
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| WANG Yong,JIANG Yi-cheng. A New Method for Restrain the Cross-terms of Time-Frequency Distributions[J]. Acta Electronica Sinica, 2008, 36(Z1): 161-165 |
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| Authors: | WANG Yong JIANG Yi-cheng |
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| Affiliation: | Research Institute of Electronic Engineering Technology, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China |
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| Abstract: | A new method for restrain the cross-terms of time-frequency distributions is presented.By introducing a phase-adjust function(PAF)based on the WVD,this method can restrain the cross-terms induced by the nonlinear character of the signal.And for multi-component signal,the CLEAN technique is adopted to filter out each component by a band-pass filter,and the cross-terms between the components are restrained.At the same time,this method has a high time-frequency convergency,the simulated results demonstrate the... |
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| Keywords: | cross-terms PAF CLEAN technique time-frequency convergency |
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