In this we apply z-transforms to the solution of certain types of difference equation. We shall see that this is done by turning the difference equation into an ordinary algebraic equation. We investigate both first and second order difference equations.

A key aspect in this process in the inversion of the z-transform. As well as demonstrating the use of partial fractions for this purpose we show an alternative, often easier, method using what are known as residues.


Learning Outcomes

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