| 基于多分辨框架下实现数字滤波器 |
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| 引用本文： | 蔡毓,刘贵忠,侯兴松,王海龙.基于多分辨框架下实现数字滤波器[J].广西科学,2001,8(3):180-183. |
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| 作者姓名： | 蔡毓 刘贵忠 侯兴松 王海龙 |
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| 作者单位： | 西安交通大学电信学院信息与通信工程系, |
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| 摘 要： | 用复频域（z域）分析方法分析二通道滤波器的结构模型，提出测定信噪比的算法。与数字Hibert滤波器进行比较，结果表明，在小波域内，基于多分辨框架下，利用二通道滤波器可实现一般数字滤波器滤波效果。在子带间窜拢可忽视情形下，该二通道滤波器可推广到多层次情形。
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| 关 键 词： | 数字滤波 数字滤波器 小波域 滤波器组 信号处理 |
| 收稿时间： | 2001/2/16 0:00:00 |
| 修稿时间： | 2001年2月16日 |
Implementation of Digital Filters in the Framework of MRA |
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| Cai Yu,Liu Guizhong,Hou Xingsong and Wang Hailong.Implementation of Digital Filters in the Framework of MRA[J].Guangxi Sciences,2001,8(3):180-183. |
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| Authors: | Cai Yu Liu Guizhong Hou Xingsong and Wang Hailong |
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| Institution: | Dept. of Info. & Communication Engineering, Telecommunication Institute, Xi''an Jiaotong Univ., Xi''an, Shaanxi, 710049, China,Dept. of Info. & Communication Engineering, Telecommunication Institute, Xi''an Jiaotong Univ., Xi''an, Shaanxi, 710049, China,Dept. of Info. & Communication Engineering, Telecommunication Institute, Xi''an Jiaotong Univ., Xi''an, Shaanxi, 710049, China and Dept. of Info. & Communication Engineering, Telecommunication Institute, Xi''an Jiaotong Univ., Xi''an, Shaanxi, 710049, China |
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| Abstract: | For more denoising,a model structure of two canal filter is analyzed in terms of the complex frequency domain (Z domain),and a algorithm for denoising is developed. In comparison with the digital Hilbert filter, the similar filtering result was obtained with two canal filter in the framework of MRA in the wavelet domain. This two canal filter could be employed in multi layer situation, if the interference among subbands is ignore. |
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| Keywords: | digital filters digital Hilbert filters wavelet domain group of filters |
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