84.1 LTI Discrete-Time Systems in the Transform domain A more convenient form of the z-domain representation of the difiference equation is given by ∑4k=-k|y(=)=∑pk=-kX() k=0 k=0§4.1 LTI Discrete-Time Systems in the Transform Domain • A more convenient form of the z-domain representation of the difference equation is given by d z Y(z) p z X(z) M k k k N k k k         =           = − = − 0 0