| 自适应软门限选择和信号消噪方法研究 |
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| 引用本文： | 洪晓芬. 自适应软门限选择和信号消噪方法研究[J]. 计算机应用与软件, 2008, 25(10) |
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| 作者姓名： | 洪晓芬 |
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| 作者单位： | 甘肃联合大学信息技术中心,甘肃,兰州,730000 |
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| 摘 要： | 在简要介绍小波多分辨率分析的理论基础上,针对小波去噪的核心问题-阈值的设定,提出了一种新的方法,即自适应软门限去噪的方法,改进了阈值消噪原理,使在消除信号噪声的同时保留信号中的弱特征成分.提出阈值估计的经验公式,通过理论和实践证明了这种方法能够有效地消除信号中的噪声,并获取最大的信噪比.
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| 关 键 词： | 阈值消噪 多分辨率分析 自适应软门限 |
STUDY ON ADAPTIVE SOFT THRESHOLD DE-NOISING METHOD |
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| Hong Xiaofen. STUDY ON ADAPTIVE SOFT THRESHOLD DE-NOISING METHOD[J]. Computer Applications and Software, 2008, 25(10) |
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| Authors: | Hong Xiaofen |
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| Affiliation: | Hong Xiaofen(Information Engineering Center,Gansu United University,Lanzhou 730000,Gansu,China) |
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| Abstract: | To solve the key problem of the threshold setting of signal de-noising,a new approach,ASTD(Adaptive Soft Threshold De-noising),is provided based on the theory of wavelet multi-resolution pyramid.With the new method,the thresholds related to the scales are estimated.The experiential result shows that the new de-noising method can hold the features of weak components and remove the noise of the signal effectively with optimal signal-to-noise ratio. |
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| Keywords: | Threshold De-noising Multi-resolution pyramid ASTD |
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