李海英,陈捷,孙进才,陈克安.分形噪声中谐波信号的提取[J].声学技术,2000,(3):131~132,136 |
分形噪声中谐波信号的提取 |
Extraction of harmonics from fractal Noise |
投稿时间:1999-10-20 修订日期:1999-12-16 |
DOI: |
中文关键词: 分形噪声 小波变换 自适应滤波 |
英文关键词: fractal noise wavelet transform adaptive filter |
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中文摘要: |
本文提出一种分形噪声中谐波信号的提取算法。它利用小波变换对1/ƒ噪声的白化作用,结合自适应自调谐滤波器组,在小波域实现了分形噪声与谐波信号的分离。仿真结果表明,该算法能够有效地抑制分形噪声,显著地提高信噪比。 |
英文摘要: |
In this paper,an extraction algorithm of harmonics in fractal noise is proposed.It is based on the fact that discrete wavelet transform can serve as a whitening filter of 1/ƒ noise.Combined with adaptive self tuning filter banks,the harmonics are separated from fractal noise in wavelet domain.Simulation result shows that the fractal noise is restrained effectively and the signal to noise ratio is improved observably by using this algorithm. |
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