Abstract:

In order to restrain the endpoints effect of empirical mode decomposition, an interpolation manner which was used to add the sampling points was presented. Algorithms of mirror based extension have been discussed; meanwhile their limitations have been pointed out. And an end extremum envelope extension algorithm has been presented. Simulation results show that end extremum envelope extension is an efficient and excellent method to eliminate end effect.Extremum envelope extension algorithm saves about half of the space of the mirror.

Key words: empirical mode decomposition, endpoints effect, extremum, extension technique