| 含白噪声阶跃信号的频谱特性及去噪分析 |
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| 引用本文： | 李蕴华.含白噪声阶跃信号的频谱特性及去噪分析[J].南通大学学报(自然科学版),2002,1(1):57-60. |
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| 作者姓名： | 李蕴华 |
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| 作者单位： | 南通工学院信息工程系,江苏,南通,226007 |
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| 摘 要： | 文章根据含有白噪声的阶跃信号的频谱特点,采用了离散小波变换的方法对该突变信号进行去噪。实验证明,若选用合适的阈值方案,利用小波变换进行去噪,其效果将明显优越于基于传统傅立叶变换的理想低通滤波去噪。
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| 关 键 词： | 去噪 离散小波变换 频谱 |
| 文章编号： | 1671-5314(2002)01-0057-04 |
Spectrum Feature of Step Signal with White Noise and Method of Noise Reducing |
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| Authors: | LI Yun-hua |
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| Abstract: | According to the spectrum feature of step signal with white noise,a method of noise reducing by using discrete wavelet transtormation is introduced in this paper.The simulation shows that,if we choose proper threshold,the effect of noise reducing by using discrete wavelet is better than that of noise reducing by using ideal lowpass-filter based on DFT. |
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| Keywords: | noise reducing discrete wavelet spectrum |
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