23. The method of claim 19, wherein the number of element calculation cycles in each interval of calculation cycles between the exclusion check points is variable.
19. The method of claim 1, further comprising before the initiating the element by element correlation calculation (s,t.sub.i) step, the additional step of: determining a series of sequential exclusion check points with intervals of element calculation cycles therebetween for comparing the cumulative bound to the exclusion threshold as the correlation calculation (s,t.sub.i) proceeds.