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Introduction to Digital Signal Processing by Robert Meddins

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3

The z-plane

3.1 CHAPTER PREVIEW

We start this chapter with a review of the s-plane, a concept with which you are probably familiar. We will then move on to its discrete equivalent – the z-plane. The z-plane has an extremely important role to play in the design and analysis of discrete systems. The significance of z-plane polezero diagrams will be discussed, both in terms of signal shapes and system frequency response. The link between the s-plane and z-plane will also be examined.

3.2 POLES, ZEROS AND THE s-PLANE

It is very likely that you have already encountered the ‘s-plane’. If so, you will appreciate how useful this concept is when it comes to the analysis and design of analogue systems. In a similar way, the z-plane is an invaluable ...

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