摘要
This paper proposes a novel de-noising algorithm based on ensemble empirical mode decomposition(EEMD) and the variable step size least mean square(VS-LMS) adaptive filter.The noise of the high frequency part of spectrum will be removed through EEMD,and then the VS-LMS algorithm is utilized for overall de-noising.The EEMD combined with VS-LMS algorithm can not only preserve the detail and envelope of the effective signal,but also improve the system stability.When the method is used on pure R6G,the signal-to-noise ratio(SNR) of Raman spectrum is lower than 10dB.The de-noising superiority of the proposed method in Raman spectrum can be verified by three evaluation standards of SNR,root mean square error(RMSE) and the correlation coefficient ρ.
基金
supported by the National Natural Science Foundation of China(No.61308120)
the Doctor Startup Project of Xinjiang University(No.BS120122)
the Young Talents Project in Xinjiang Uygur Autonomous Region(No.2013731003)
the Xinjiang Science and Technology Project(Nos.201412107 and 2014211B003)
