Comprehensive Evaluation Study on the Methods for Restraining the End Effects in EMD

摘要

For the endpoint effect of the Empirical Mode Decomposition (EMD), researchers have proposed some suitable suppression algorithms so far. In order to compare the decomposition results of those algorithms quantitatively and objectively, after in-depth analysis of the causes of endpoint effects, this study proposes a synthetic evaluation indicator system, which gives attention to both decomposition efficiency and decomposition results. Through allocating reasonable and feasible weights to decomposition rate, correlation coefficient of IMF components and the original signal and the energy difference before-and-after decomposition, this proposed system constructs an evaluation function. Finally, by utilizing this proposed system to evaluate currently used endpoint effect solutions with simulated signals, the results have shown that this proposed system is an effective way of evaluating those suppressing methods.