# Chap 7 & 8 Online Revision Tutorial (Concise).pdf

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Chapters 7 &amp; 8 – Online Revision Tutorial (Concise/Moderate/ Detailed)

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Contents

Mind Map of Overall Picture …………………………………………………………….……..…………………………………..…… i
Briefing …………………………………………………………………………………………………………………………………………. ii

Contents …………………………………………………………………………………………………………………….………..………. iii
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System Block Diagram ↔ Difference Equation ..................................................................................... 1

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System Transfer Function, (𝑧𝑧) ↔ Unit Impulse Response, ℎ(𝑛𝑛) ......................................................... 7

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Difference Equation ↔ System Transfer Function, (𝑧𝑧) ......................................................................... 7

System Transfer Function, (𝑧𝑧) → Order of System .............................................................................. 7
Unit Impulse Response, ℎ(𝑛𝑛) → FIR / IIR .............................................................................................. 7

Recursive / Non-Recursive System ........................................................................................................ 8

Difference Equation → Calculate 𝑦𝑦(𝑛𝑛) by substitution &amp; iteration ..................................................... 8

Difference Equation → Calculate ℎ(𝑛𝑛) by substituting 𝑥𝑥(𝑛𝑛) = δ(𝑛𝑛) ................................................... 8
System Transfer Function, (𝑧𝑧) → Calculate 𝑦𝑦(𝑛𝑛) by Z-transform ........................................................ 8

10 System Transfer Function, (𝑧𝑧) → Frequency Response, (ej𝜔𝜔) .............................................................. 9

11 Frequency Response, (ej𝜔𝜔) → Magnitude Response, |(ej𝜔𝜔)| ................................................................. 9
12 Magnitude Response, |(ej𝜔𝜔)| → Type of Filter (LPF/HPF)................................................................... 9

13 Magnitude Response, |(ej𝜔𝜔)| → Calculate Magnitude Response at a given frequency. ...................... 9
14 Magnitude Response, |(ej𝜔𝜔)| → Calculate −3 dB Cutoff Frequency .................................................... 9

15 Formula Sheet........................................................................................................................................... 9