| 基于信号分类的时频分布 |
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| 引用本文： | 刘伟,刘光斌,刘冬,吴红. 基于信号分类的时频分布[J]. 宇航计测技术, 2002, 22(6): 34-38 |
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| 作者姓名： | 刘伟 刘光斌 刘冬 吴红 |
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| 作者单位： | 1. 第二炮兵工程学院,陕西,西安,710025
2. 第二炮兵第二研究所,北京,100080 |
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| 摘 要： | 在将时频分析应用于模式识别的应用中 ,传统的方法是先用时频分析方法表示所获得的信号 ,然后根据时频分布提取相应的特征 ,最后将所提取到的特征输入到分类器进行分类。为了使得时频分布具有好的局部聚焦性和抑制交叉项 ,学者对一些分布进行改进 ,如采用平滑函数 ,或者是采用降低干扰核设计等等。但其目的是获得良好的时频分布 ,其最终目的不是应用于信号分类。介绍了一种基于信号分类的时频分布设计 ,其目的不是获得良好的时频分布 ,而是获得很好的分类效果。
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| 关 键 词： | 时频分布 信号分类 信号分析 Subject terms Signal classification Time-frequency distributions Feature Research |
| 文章编号： | 1000-7202(2002)06-0034-04 |
| 修稿时间： | 2002-05-29 |
Time-frequency distributions for signal classification |
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| Liu Wei Liu Guangbin Liu Dong Wu Hong. Time-frequency distributions for signal classification[J]. Journal of Astronautic Metrology and Measurement, 2002, 22(6): 34-38 |
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| Authors: | Liu Wei Liu Guangbin Liu Dong Wu Hong |
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| Affiliation: | Liu Wei 1 Liu Guangbin 1 Liu Dong 1 Wu Hong 2 |
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| Abstract: | In many pattern recognition applications based time-frequency analysis, features are traditionally extracted from standard time-frequency distributions(TFDs) and then are inputted into classifier for class. To improve the local focus and restrain cross term, people adopted smoothing functions or reduced interfere kernel et al. But its purpose is for enhancing readability, not for signal classification. The method introduced in this paper is depended on the signal and it aimed to signal classification, so it can obtain good class effect. |
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| Keywords: | Subject terms Signal classification Time-frequency distributions Feature Research |
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