| 小波软阈值滤波在信号去噪中的有效性研究 |
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| 引用本文： | 唐科狄,何平,魏化媚,朱水娟.小波软阈值滤波在信号去噪中的有效性研究[J].舰船电子工程,2009,29(7):128-129. |
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| 作者姓名： | 唐科狄 何平 魏化媚 朱水娟 |
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| 作者单位： | 1. 哈尔滨工业大学航天学院,哈尔滨,150001
2. 东北大学信息科学与工程学院,沈阳,110004 |
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| 摘 要： | 对于高幅度和宽尺寸的噪声要素,尤其是当有用信号的幅度和噪声尺度相差不大时,使用传统的傅里叶滤波和一般的小波变换去噪的效果不是很好,对此提出了一种软阈值去噪方法。根据小波理论及软阈值滤波的算法,用MAT-LAB对四种典型信号和陀螺信号进行去噪仿真研究。理论分析和仿真结果表明,这种方法能有效消除高频随机信号和特定尺度的噪声,同时又能很好地保留原有的有用信号。
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| 关 键 词： | 软阈值 小波理论 陀螺信号 去噪仿真 |
Research on the Validity of Wavelet Soft-threshold Filtering in Signal De-noising |
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| Tang Kedi,He Ping,Wei Huamei,Zhu Shuijuan.Research on the Validity of Wavelet Soft-threshold Filtering in Signal De-noising[J].Ship Electronic Engineering,2009,29(7):128-129. |
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| Authors: | Tang Kedi He Ping Wei Huamei Zhu Shuijuan |
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| Institution: | Tang Kedi, He Ping, Wei Huamei, Zhu Shuijuan (1.School of Astronautics, Harbin Institute of Technology, Harbin 150001;2.College of Information Science and Engineering, Northeastern Universit , Shenyang 110004 ) |
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| Abstract: | Traditional Fourier filtering method and wavelet transform method fail to satisfied results for high amplitude and wide extent noises, especially when the noises and signal scale in comparable scale. This paper presents a method of denoising based of soft-threshold. According to the algorithms of wavelet theory and soft-threshold filtering, the MATLAB simulation on four kinds of typical signal and gyro signal was studied. The simulation experiment shows that the soft-threshold can effectively eliminate high-frequency random noises and particular scale noises, at the same time, it can retain original signal. |
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| Keywords: | soft-threshold wavelet theory gyro signal de-noising simulation |
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