A representation theorem for linear discrete‐space systems
Irwin W. Sandberg · Mathematical Problems in Engineering · 1998
The cornerstone of the theory of discrete‐time single‐input single‐output linear systems is the idea that every such system has an input–output map H that can be represented by a convolution or the familiar generalization of a convolution. This thinking involves an oversight which is corrected in this note by adding an additional term to the representation.