| 调频广播信号降噪处理的小波分析 |
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| 引用本文： | 陈吉文.调频广播信号降噪处理的小波分析[J].电子质量,2010(3):70-72. |
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| 作者姓名： | 陈吉文 |
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| 作者单位： | 西安电子科技大学机电工程学院,陕西,西安,710071 |
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| 摘 要： | 简述了小波分析的理论基础以及降噪原理．比较了常用的三种小波函数。对某广播电台测得的调频广播信号．分别用db小波、sym小波和Coif小波进行信号分解．采取软阈值的方法进行降噪处理．然后重构降噪后的信号。最后指出了小波属性对降噪结果的影响。
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| 关 键 词： | 小波分析 信号降噪 Matlab |
FM Signal Denoising Based on Wavelet Theory |
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| Chen Ji-wen.FM Signal Denoising Based on Wavelet Theory[J].Electronics Quality,2010(3):70-72. |
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| Authors: | Chen Ji-wen |
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| Affiliation: | Mechanical-electronic Engineering Institue;Xi'dian University;Shanxi Xi'an 710071 |
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| Abstract: | The wavelet analytical theories and principle for denoising was introduced,then a comparance among the three kinds of the wavelet functions in common use was described.For FM signal the db4 wavelet,sym4 wavelet and coif4 wavelet were used ,the signal was carry on decomposition respectively.To depress noise,the soft threshold value method was used.Then,the signal denoised was reconstructed.Finally,the fact that the character of wavelets influence the denoised result were pointed out. |
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| Keywords: | wavelet analyse signal denoising Matlab |
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