文章摘要
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
基金项目:
作者单位
李海英 西安交通大学机械制造系统工程国家重点实验室, 西安 710049 
陈捷 西北工业大学航海工程学院, 西安 710072 
孙进才 西北工业大学航海工程学院, 西安 710072 
陈克安 西北工业大学航海工程学院, 西安 710072 
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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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