S 4.1 LTI Discrete-Time Systems in the Transform Domain This course is concerned with LTI discrete-time systems characterized by linear constant coefficient difference equations of the form: N M ∑dkyIn-k]=∑pkx[n-k] k=0 k=0§4.1 LTI Discrete-Time Systems in the Transform Domain • This course is 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 [ ] [ ]