| 基于多分辨率分析的1/f类噪声滤波器设计 |
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| 引用本文： | 赵忠华,张炎华,江红.基于多分辨率分析的1/f类噪声滤波器设计[J].上海交通大学学报,2002,36(7):1037-1040. |
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| 作者姓名： | 赵忠华 张炎华 江红 |
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| 作者单位： | 上海交通大学信息检测技术及仪器系,上海,200030 |
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| 基金项目： | 国防预研重点项目 ( 9.2 .6 .2 ) |
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| 摘 要： | 针对1/?类噪声的非平稳、自相似、长程相关以及幂指数型的功率谱等特性，根据小波理论以及多分辨率分析思想给出了1/?类噪声的多分辨率分解的表示方法，在此基础上建立了其小波模型并设计出相应的白化滤波器。运用基于小波的阀值限定的方法进行消噪，以干涉式光纤陀螺系统中由于偏置不稳定性造成输出信号中所存在的1/?类噪声为研究对象进行仿真分析。结果表明，该方法处理此类非平稳噪声的有效性。
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| 关 键 词： | 1／f类噪声 设计 多分辨率分析 长程相关性 白化滤波器 小波模型 噪声消除 |
| 文章编号： | 1006-2467(2002)07-1037-04 |
| 修稿时间： | 2001年3月2日 |
Filter Design of 1/f Type Noise Based on Multiresolution Analysis |
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| ZHAO Zhong-hua,ZHANG Yan-hua,JIANG Hong.Filter Design of 1/f Type Noise Based on Multiresolution Analysis[J].Journal of Shanghai Jiaotong University,2002,36(7):1037-1040. |
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| Authors: | ZHAO Zhong-hua ZHANG Yan-hua JIANG Hong |
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| Abstract: | The characteristics of non-stationary, self-similarity, long-term correlation and 1/f type power spectrum of 1/f noise were analyzed. The multiresolution decomposition method of 1/f type noise based on wavelet theory and multiresolution analysis idea was presented. Its wavelet-based mode was given and the corresponding wavelet-based whitening filter was designed. The denoised method of signal's wavelet coefficient threshold using the principle of Sten's unbiased risk estimation was proposed. The research object is the bias instability noise of the output signal of interferometric fiber optic gyro. The simulation reveals the effectiveness of the proposed scheme. |
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| Keywords: | f noise multiresolution analysis long-term correlation whitening filter |
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