NON RECURSIVE FILTER A non recursive filtration system is that in which the current result (yn) is computed solely from the current and previous insight prices (xn, xn-1, xn-2, . . . ). A recursive filtration system is one that in addition to suggestions values also uses earlier output worth. These, like the prior input beliefs, are stored in the processor's recollection. A digital filtration system that lacks reviews; that is, its output depends on present and previous..