A new method for separating mixed modes in empirical mode decomposition

A new method has been proposed to solve the problem of mode mixing in empirical mode decomposition(EMD).The method combines the difference operation,the cumulative sum,and EMD to perform the separation of mixed modes.A computer simulation was made on numerical simulation signals and LOD(length of day) data.A comparison between the results from EMD algorithm and the proposed algorithm was executed.The results showed that the proposed method can separate the mixed mode successfully and a set of Intrinsic Mode Functions(IMF) with clear scale range can be obtained.