A new denoising method based on Empirical Mode Decomposition(EMD)
Chen Kai1,2
1. Zhejiang Communication vocational College,Hangzhou City,Zhejiang Province,311112,China;
2. Information Engineering Institute of Physics,Central South University,Changsha City,Hunang Provinve,4100083,China
Abstract:If using EMD to decompose white noise,the product of energy density and average cycle of the intrinsic mode function component will be a constant,based on this conclusion,the EMD filtering denoising method is developed.The analysis for modeling data shows that EMD can be used as adenoising filter,and the denoising effects for the filter is related to the noise level.When noise's variance is less than signal amplitude and there is no high frequency signal,the filter works very well and the results for filtering and denoising are excellent.The denoising effect for the EMD depends on if there are high frequency signal in the datasets,if there are high frequency signal and the noise level is high,the obvious distortion in the filtering curve can be found.