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基于小波能量熵的水下目标磁场信号去噪

Marine Electric & Electronic Engineering(2011)

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Abstract
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,检测出目标磁场信号。
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Key words
wavelet transform,de-noising,wavelet energy entropy,magnetic signal,underwater target
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