Question

a) List the relative attributes of using digital processing techniques compared to traditional analogue hardware for signal processing. [5 marks] b) Sketch a z-plane diagram including the unit circle. You have four Poles and two Zeros that you can place on the z-plane diagram. Place them in a position which would provide a digital band-stop filter characteristic with the 'notch' at a n/2 Justify your placement of the poles and zeros. 5 marks] c) The z-plane pole-zero plots of two filters are shown below: Im z-plane Figure 4.1 What type of frequency response characteristic would you expect from each of the two filters i.e. low pass, high pass, band pass, or band stop? (note: it is not necessary to explicitly calculate the transfer functions unless you find it necessary) 5 marks) d) Sketch the structure of a 3-point moving average filter, and determine its z-domain transfer function. Plot the poles and zeros on a z-plane diagram [10 marks

Answer 1

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