| 模极大值降噪法在信号降噪中的应用 |
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| 引用本文： | 吴玲玲,张建立,寇亚舟.模极大值降噪法在信号降噪中的应用[J].无线电工程,2007,37(6):32-34. |
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| 作者姓名： | 吴玲玲 张建立 寇亚舟 |
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| 作者单位： | 中国电子科技集团公司第54研究所,河北,石家庄,050081 |
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| 摘 要： | 利用信号与噪声奇异点Lipschitz指数的区别,以及反映在其小波变换模极大值曲线上的特点,应用小波变换模极大值降噪法,对含有带限高斯白噪声的数字通信信号进行了降噪处理,并对降噪原理、算法和仿真结果进行了较为详细的分析。提出了一种信号重构新方法,该方法利用小波变换对信号和噪声的模极大值进行分离,通过对噪声模极大值对应的小波系数进行线性压缩后重构信号,并用仿真试验验证了该方法的有效性。
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| 关 键 词： | 带限白噪声 Lipschitz指数 小波变换 模极大值降噪法 信噪比 |
| 文章编号： | 1003-3106（2007）06-0032-03 |
| 修稿时间： | 2006-12-22 |
Modular Maximum De-noising Applied to Signals |
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| WU Ling-ling,ZHANG Jian-li,KOU Ya-zhou.Modular Maximum De-noising Applied to Signals[J].Radio Engineering of China,2007,37(6):32-34. |
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| Authors: | WU Ling-ling ZHANG Jian-li KOU Ya-zhou |
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| Affiliation: | The 54th Research Institute of CETC, Shijiazhuang Hebei 050081, China |
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| Abstract: | As the signal singularities and noise fluctuations have different lipschtiz opponents and distinct modular curve,the modular maximum de-noising is applied to de-noising digital communication signals with band-limited white Gaussian noise.It is described in aspects about the theory,algorithm,simulation and result-analysis.A new method about reconstructing signals using the modular maximum de-noising is proposed.The signal is separated from noise in modular maxima by wavelet transform,and the coefficients belonging to the noise are compressed,then the de-noised signal is reconstructed.The simulation experiments are performed to validate the new method. |
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| Keywords: | band-limited white noise wavelet transform modular maximum de-noising lipschitz exponent SNR |
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