84.1 LTI Discrete-Time Systems in the transform domain A more convenient form of the z-domain representation of the diffe Terence equation is given by -k )=∑pk=-X() 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