|
|||||
|
|
| 基于自项窗的WVD交叉项抑制技术 | |
| 引用本文： | 李耀东,冯涛,袁超伟. 基于自项窗的WVD交叉项抑制技术[J]. 无线电通信技术, 2010, 36(4): 39-42 |
| 作者姓名： | 李耀东 冯涛 袁超伟 |
| 作者单位： | 1. 中国电子科技集团公司第五十四研究所,河北石家庄,050081 2. 中国电子科技集团公司第五十四研究所,河北石家庄050081;北京邮电大学信息与通信工程学院,北京100876 3. 北京邮电大学信息与通信工程学院,北京,100876 |
| 摘 要： | 为了解决维格纳-维利分布(WVD)的交叉项干扰问题,提出一种覆盖自项支撑区的时频窗——自项窗,通过对信号的WVD进行加窗处理,得到改进的时频分布。首先分析了多分量信号WVD中自项和交叉项的不同特点,接着论述了自项窗法的原理及自项窗的构造方法,分析了改进的时频分布的性质,最后进行了仿真验证。结果表明,自项窗法能够有效消除WVD中的交叉项,并保留WVD良好的时频分辨率和能量聚集性,适合于非平稳信号的时频分析。 |
| 关 键 词： | 维格纳-维利分布 自项窗 交叉项 时频聚集性 |
Auto-term Window Method for Cross-term Reduction of Wigner-Ville Distribution |
|
| LI Yao-dong,FENG Tao,YUAN Chao-wei. Auto-term Window Method for Cross-term Reduction of Wigner-Ville Distribution[J]. Radio Communications Technology, 2010, 36(4): 39-42 | |
| Authors: | LI Yao-dong FENG Tao YUAN Chao-wei |
| Affiliation: | 1.The 54th Research Institute of CETC,Shijiazhuang Hebei 050081,China;2.School of Information and Telecommunication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China) |
| Abstract: | To reduce the cross-term interference of Wigner-Ville distribution（WVD）,a window in time-frequency plane named auto-term window is put forward,which can localize the area of auto-term of WVD.Via windowing the auto-term of WVD,an improved time-frequency distribution is achieved.Firstly,the respective features of auto-term and cross-term are analyzed.Then the principle and implementation method of auto-term window is discussed,and the property of the improved time-frequency distribution is proved.Finally,a computer simulation is conducted.The result shows that the method is effective to reduce the cross-term interference of WVD and keep a high time-frequency resolution simultaneously;therefore,it is suitable for time-frequency analysis of non-stationary signals. |
| Keywords: | Wigner-Ville distribution cross-term auto-term window time-frequency concentration |
| 本文献已被 维普 万方数据 等数据库收录！ | |