| 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.[点击复制] |
| Wei Jibo,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[点击复制] |
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| 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 |
| 魏急波, 程时昕 |
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(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 |
| 关键词: 小波包，多载波调制，脉冲噪声，窄带噪声 |
| DOI： |
| 投稿日期：1997-04-14 |
| 基金项目: |
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| Wavelet Packet Transforming to Counteract the Impulse and Narrow-banded Interference in Multicarriers Modulation System |
| Wei Jibo, Cheng Shixin |
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(Southeast University，Nanjing，210018)
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| Abstract: |
| The wavelet packet transforming (WPT) can give finer time-frequency localization of a signal. ln this paper，a model of multicarrier modulation system using WPT is proposed. Based on this model，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. |
| Keywords: wavelet packet,multicarrier modulation,impulse noise,narrow-banded noise |
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