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 input prices only rather than on previous outcome beliefs in non recursive filter In non-recursive filtration systems, the end result y at the moment t is a function of only source values x(t-z), z>1 corresponding to the time moments t-z. A non-recursive filter is also called an FIR (or Finite Impulse Response) filtration system.