| 一种改进的小波阈值去噪方法 |
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| 引用本文： | 王彦青,魏连鑫. 一种改进的小波阈值去噪方法[J]. 上海理工大学学报, 2011, 33(4) |
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| 作者姓名： | 王彦青 魏连鑫 |
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| 作者单位： | 上海理工大学理学院,上海,200093 |
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| 基金项目： | 上海市高校选拔培养优秀青年教师科研专项基金资助项目(5107341007) |
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| 摘 要： | 介绍了基于阈值选取的小波去噪原理及实现方法,并对传统的软、硬阈值方法进行分析,提出一种改进的阈值函数.实验结果表明,新方法能有效地减少平稳信号与非平稳信号中产生的震荡和恒定偏差的影响,去噪效果优于传统方法.
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| 关 键 词： | 小波分析 阈值去噪 信噪比 均方差 |
Analysis on modified wavelet threshold de noising functions |
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| WANG Yan qing and WEI Lian xin. Analysis on modified wavelet threshold de noising functions[J]. Journal of University of Shanghai For Science and Technology, 2011, 33(4) |
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| Authors: | WANG Yan qing and WEI Lian xin |
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| Affiliation: | WANG Yan-qing,WEI Lian-xin(College of Science,University of Shanghai for Science and Technology,Shanghai 200093,China) |
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| Abstract: | For the wavelet threshold de-noising method,the threshold selection of wavelet was addressed based on de-noising principle,and the traditional soft and hard threshold methods were descussed.On this basis,the modified threshold function was introduced.The results of experimental simulations indicate that the modified de-noising method can reduce effectively the stationary and non-stationary signals generated by the impact of shocks and the constant bias.The new threshold function is of better de-noising capa... |
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| Keywords: | wavelet analysis threshold de-noising signal to noise ratio mean square error |
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