84.1 LTI Discrete-Time Systems in the Transform domain In this course we shall be concerned with lti discrete-time systems characterized by linear constant coefficient difference equations of the form: ∑dky{n-k]=∑pkxn-k] k=0§4.1 LTI Discrete-Time Systems in the Transform Domain • In this course we shall be concerned with LTI discrete-time systems characterized by linear constant coefficient difference equations of the form:   = = − = − M k k N k k d y n k p x n k 0 0 [ ] [ ]