| 基于一种新的小波阈值函数的雷达信号去噪 |
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| 引用本文： | 薛伟,关福宏,陈良章,孙晓玮.基于一种新的小波阈值函数的雷达信号去噪[J].计算机仿真,2008,25(8). |
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| 作者姓名： | 薛伟 关福宏 陈良章 孙晓玮 |
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| 作者单位： | 1. 中国科学院上海徽系统与信息技术研究所,上海,200050;中国科学院研究生院,北京,100049
2. 中国科学院上海徽系统与信息技术研究所,上海,200050 |
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| 摘 要： | 小波变换具有多分辨分析的特性和良好的时频局部化分析能力,在雷达信号去噪中得到了广泛的应用,但是常用的小波阈值法存在着一些缺陷,影响了去噪的性能.在传统的软硬阈值函数基础上,提出了一种新的小波阈值函数,可较好地克服软硬阈值函数的缺陷,与已有的几种改进阈值函数相比,其计算简单、连续性好且便于调节,适合于进行各种数学处理.对Doppler信号的仿真实验表明,新阈值函数可有效的抑制噪声,其去噪后的信噪比和均方根误差均优于软硬阈值函数以及已有的几种改进阈值函数,具有较高的实用价值.
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| 关 键 词： | 小波阈值去噪 阈值函数 雷达信号 |
Radar Signal De-noising Based on a New Wavelet Thresholding Function |
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| XUE Wei,GUAN Fu-hong,CHEN Liang-zhang,SUN Xiao-wei.Radar Signal De-noising Based on a New Wavelet Thresholding Function[J].Computer Simulation,2008,25(8). |
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| Authors: | XUE Wei GUAN Fu-hong CHEN Liang-zhang SUN Xiao-wei |
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| Affiliation: | XUE Wei1,2,GUAN Fu-hong1,CHEN Liang-zhang1,SUN Xiao-wei1(1.Shanghai Institute of Microsystem , Information Technology,Chinese Academy of Sciences,Shanghai 200050,China,2.Graduate School of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | Wavelet transform has the characteristics of multi-resolution analysis and time-frequency localization analysis and has been widely used for the de-noising of radar signal,but the conventional wavelet threshold de-noising method has some defects and influences the performance of de-noising.A new thresholding function is introduced based on soft and hard thresholding functions and it can overcome the shortcomings of soft and hard thresholding functions.Compared with the existing improved thresholding functio... |
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| Keywords: | Wavelet threshold de-noising Thresholding function Radar signal |
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