| 一种新的信号去噪方法及在激光信号中的应用 |
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| 引用本文： | 李立,彭玉华,杨明强,薛佩军.一种新的信号去噪方法及在激光信号中的应用[J].红外与激光工程,2006,35(3):305-309. |
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| 作者姓名： | 李立 彭玉华 杨明强 薛佩军 |
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| 作者单位： | 1. 山东大学,信息科学与工程学院,山东,济南,250100
2. 山东大学,数学院,山东,济南,250100 |
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| 基金项目： | 教育部留学人员基金;山东省自然科学基金 |
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| 摘 要： | 小波去噪是信号去噪的主要方法之一,目前的研究主要集中于如何选取阈值使去噪达到较好的效果,其中Donoho的阈值方法应用广泛.与传统双通道小波变换相比,三通道小波变换具有很多优势.基于这一理论,结合非参数自适应估计,推导出了一种适用于三通道小波域的自适应的信号去噪方法.实验证明,与三通道小波域中基于Donoho方法的去噪相比,该方法可以更好地保护细节以及提高重建信号的信噪比,在激光超声信号处理中也表现出良好的性能.
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| 关 键 词： | 非参数 自适应估计 三通道小波 信号去噪 |
| 文章编号： | 1007-2276(2006)03-0305-05 |
| 收稿时间： | 2005-08-30 |
| 修稿时间： | 2005-09-20 |
New signal de-noising method and its application in laser signal |
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| LI Li,PENG Yu-hua,YANG Ming-qiang,XUE Pei-jun.New signal de-noising method and its application in laser signal[J].Infrared and Laser Engineering,2006,35(3):305-309. |
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| Authors: | LI Li PENG Yu-hua YANG Ming-qiang XUE Pei-jun |
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| Affiliation: | 1.School of Information Science and Engineering, Shandong University, Jinan 250100, China; 2.School of Mathematics, Shandong University, Jinan 250100, China |
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| Abstract: | Wavelet de-noising was an important method of signal de-noising. Recently, most of research on wavelet de-noising focused on how to select the threshold. As one of main methods, Donoho was applied widely. Compared with traditional 2-band wavelet, 3-band wavelet has advantage in many aspects. Based on this theory, an adaptive signal de-noising method in 3-band wavelet domain combined with nonparametric adaptive estimation was presented. The experiment results show that in 3-band wavelet domain, the new method had better performance than Donoho method in keeping detail information and improving signal-to-noise ratio of reconstruction signal. It was also effective in laser ultrasonic signal processing. |
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| Keywords: | Nonparametric Adaptive estimation 3-band wavelet Signal de-noising |
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