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《Marine Electric & Electronic Engineering》 2011-04
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De-noising of Underwater Target Magnetic Signal Based on Wavelet Energy Entropy

Fang Shi1,Chen Chaohong2,Yin Zhengbao2(1.Naval Representatives Office of Yichang,Yichang 200011,China;2.No.710 Research Institute,CSIC,Yichang 443003,China)  
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 shows that the method based on wavelet energy entropy has good performance in de-noising,and reserves the detailed information.
【CateGory Index】: TN911.4
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