Restraining Method for End Effect Based on Mirror Extension and Window Function
XU Li-bi · Jisuanji gongcheng · 2015
Empirical Mode Decomposition( EMD) is widespread used in complex signal processing,but it exists the end effect in decomposition processing,and the end effect w ill further deepen w ith the process of filtration. Thus,it w ill cause data error. The methods of mirror extension and w indow function are effective methods for dealing w ith the end effect,but they are flaw ed. This paper presents a lifting method combining mirror extension and cosine w indow function. It makes up the deficiencies of mirror extension in original signal endpoint being not extreme value point and w indow function method in the need to change the original signal. Experimental result manifests that this lifting method can better restrain the end effect compared w ith some traditional methods.