| 用小波包变换降低 MCM 系统中并存的脉冲干扰和窄带干扰的影晌 |
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| 引用本文： | 魏急波,程时昕.用小波包变换降低 MCM 系统中并存的脉冲干扰和窄带干扰的影晌[J].国防科技大学学报,1998,20(1):57-62. |
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| 作者姓名： | 魏急波 程时昕 |
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| 作者单位： | 东南大学移动通信国家实验室!南京，210018，东南大学移动通信国家实验室!南京，210018 |
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| 摘 要： | 小波包变换可以给出信号精细的时频局域化特性，本文通过对信号进行小波包变换，导出了用小波包变换实现多载波调制（MCM）的系统模型，在此基础上研究了用小波包时频分解特性对信号进行变换，从而降低MCM系统中并存的脉冲噪声和窄带干扰的影响，并给出了如何选取时频单元进行变换的算法。
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| 关 键 词： | 小波包 多载波调制 脉冲噪声 窄带噪声 |
| 收稿时间： | 1997/4/14 0:00:00 |
Wavelet Packet Transforming to Counteract the Impulse and Narrow-banded Interference in Multicarriers Modulation System |
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| Wei Jibo and Cheng Shixin.Wavelet Packet Transforming to Counteract the Impulse and Narrow-banded Interference in Multicarriers Modulation System[J].Journal of National University of Defense Technology,1998,20(1):57-62. |
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| Authors: | Wei Jibo and Cheng Shixin |
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| Abstract: | The wavelet packet transforming (WPT) can give finer time-frequency localization of asignal. In this paper, a model of multicarrier modulation system using WPT is proposed. Based on thismodel, a method is studied to counteract the impulse and narrow-banded interference, using decomposition of a signal in the time-frequency plane. An algorithm to select the time-frequency atom is given. |
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| Keywords: | wavelet packet multicarrier modulation impulse noise narrow-banded noise |
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