| 基于改进阈值消噪算法的小波包降噪 |
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| 引用本文： | 于文新,张谦.基于改进阈值消噪算法的小波包降噪[J].通信技术,2010,43(6):7-9. |
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| 作者姓名： | 于文新 张谦 |
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| 作者单位： | 1. 湖南中移鼎讯通信有限公司,湖南长沙,410011
2. 长沙理工大学数学与计算科学学院,湖南长沙,410011 |
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| 摘 要： | 小波变换是一种把时间和频率结合起来的时频分析方法,D.L.Dohono在小波变换的基础上提出了小波软、硬阈值消噪法,此方法简单有效,得到了广泛的重视和研究。在经典的小波软、硬阈值消噪方法的基础上,提出了一种基于小波包分析的改进方法。Matlab仿真结果表明,此法同时克服了软、硬阈值方法的缺点,而且其消噪效果比小波消噪方法要好。
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| 关 键 词： | 小波包分析 小波包阈值降噪 阈值 阈值函数 均方根误差 信噪比 |
Signal De-noising in Wavelet Packet Based on An Improved-threshold Function |
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| YU Wen-xin,ZHANG Qian.Signal De-noising in Wavelet Packet Based on An Improved-threshold Function[J].Communications Technology,2010,43(6):7-9. |
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| Authors: | YU Wen-xin ZHANG Qian |
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| Affiliation: | YU Wen-xin,ZHANG Qian(China Hunan Topssion Communications Co,LTD,Changsha Hunan 410011,China,Department of Mathematics,ChangSha University of Science , Technology,China) |
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| Abstract: | Wavelet transform is a time-frequency analysis method.D.L.Dohono,based on the wavelet transform,proposes the wavelet soft-and hard-threshold denoising method,this method is simple and effective,and receives much attention and study.With the two traditional wavelet de-noising methods of soft-threshold and hard-threshold strategy,an improved method based on wavelet packet analysis is proposed.The simulation with the Matlab indicates that the improved method overcomes shortcomings of the traditional nonlinear ... |
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| Keywords: | wavelet packet analysis wavelet packet shrinkage threshold threshold function RMSE SNR |
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