| 分形噪声中谐波信号的提取 |
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| 引用本文： | 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, 19(3): 131-132,136 |
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| 作者姓名： | 李海英 陈捷 孙进才 陈克安 |
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| 作者单位： | 1. 西安交通大学机械制造系统工程国家重点实验室,西安,710049
2. 西北工业大学航海工程学院,西安,710072 |
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| 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／f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。
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| 关 键 词： | 分形噪声 小波变换 谐波信号 信号估计 |
| 收稿时间： | 1999-10-20 |
| 修稿时间： | 1999-12-16 |
Extraction of harmonics from fractal Noise |
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| LI Hai-ying,CHEN Jie,SUN Jin-cai and CHEN Ke-an. Extraction of harmonics from fractal Noise[J]. Technical Acoustics, 2000, 19(3): 131-132,136 |
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| Authors: | LI Hai-ying CHEN Jie SUN Jin-cai CHEN Ke-an |
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| Affiliation: | State Key Laboratory for Manufacturing Systems Engineering, Xi''an Jiaotong University, Xi''an 710049, China;College of Marine Engineering, Northwestern Polytechnical Unive, Xi''an 710072, China;College of Marine Engineering, Northwestern Polytechnical Unive, Xi''an 710072, China;College of Marine Engineering, Northwestern Polytechnical Unive, Xi''an 710072, China |
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| Abstract: | 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/ f 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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| Keywords: | fractal noise wavelet transform adaptive filter |
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