| 基于小波能量熵的水下目标磁场信号去噪 |
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| 引用本文： | 方石,陈朝宏,殷正保. 基于小波能量熵的水下目标磁场信号去噪[J]. 船电技术, 2011, 31(4): 60-63 |
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| 作者姓名： | 方石 陈朝宏 殷正保 |
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| 作者单位： | 海军驻宜昌地区军事代表室;中船重工集团第710研究所; |
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| 摘 要： | 本文提出了基于小波能量熵的水下目标磁场信号去噪方法,通过对信号进行小波分解,计算各层目标信号和背景噪声的小波系数能量熵,利用信号在不同的分解尺度上具有不同的小波熵,自适应地确定高频系数的阈值,利用经过处理后的小波系数进行小波反变换,实现对水下目标磁场信号的去噪.仿真试验结果表明,该方法能有效去除背景噪声,检测出目标磁场...
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| 关 键 词： | 水下目标 磁场信号 小波变换 小波能量熵 去噪 |
De-noising of Underwater Target Magnetic Signal Based on Wavelet Energy Entropy |
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| Fang Shi,Chen Chaohong,Yin Zhengbao. De-noising of Underwater Target Magnetic Signal Based on Wavelet Energy Entropy[J]. Marine Electric & Electronic Technology, 2011, 31(4): 60-63 |
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| Authors: | Fang Shi Chen Chaohong Yin Zhengbao |
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| Affiliation: | Fang Shi1,Chen Chaohong2,Yin Zhengbao2(1.Naval Representatives Office of Yichang,Yichang 200011,China,2.No.710 Research Institute,CSIC,Yichang 443003,China) |
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| Abstract: | In this paper,a de-noising method based on wavelet energy entropy to magnetic signal of underwater target is proposed.The energy entropy of target magnetic signals wavelet coefficients and that of background noise in different scales are calculated respectively.Then the wavelet threshold is determined by the wavelet energy entropy distribution character.Finally,the de-noised target magnetic signal is obtained by the wavelet reconstructed from the wavelet coefficients which have been processed.The experiment... |
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| Keywords: | underwater target magnetic signal wavelet transform wavelet energy entropy de-noising |
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