Method and System for Identifying Events of Digital Signal

摘要

Abstract The present application relates to a method for identifying events of digital signal. The method identifies the events of a digital signal by means of the characteristic that the events of a digital signal basically depend on the signal phase. FPEL12150256US 1/9 performing Hilbert transform on random noise signal trace gather deriving a cosine phase function trace gather of the random noise signal trace gather horizontally stacking the cosine phase function trace gathers so as to obtain Sn (t) deriving statistically a relationship between the maximum of Sn(t) and the number of times of overlaying to obtain the identification threshold function Fig. 1A inputting an input digital signal trace gather that is to be identified and that contains noise performing a Hilbert transform on said input digital signal trace gather to be identified obtaining a cosine phase function trace gather of said input digital signal trace gather horizontally stacking the cosine phase function trace gathers comparing the function value obtained at each time sampling point by horizontally stacking the cosine phase function trace gathers in step 1104 with an identification threshold function value identifying the time sampling points at which the function value obtained by horizontal stack is greater than identification threshold function value as having events Fig. lB