Year
2021
Units
4.5
Contact
3 x 1-hour lectures weekly
6 x 2-hour tutorials per semester
7 x 2-hour laboratories per semester
Enrolment not permitted
1 of ENGR3731, ENGR8831 has been successfully completed
Assumed knowledge
Ability to understand and apply electronic circuits incorporating operational amplifiers, diodes, transistors, such as can be obtained in ENGR8703 Electronics GE. Experience in an electronics laboratory using oscilloscopes and function generators, such as can be obtained in ENGR8703 Electronics GE. Ability to understand and apply concepts from linear time-invariant systems, such as can be obtained in ENGR8722 Analysis of Engineering Systems GE.
Topic description

Spectral Density and Noise: energy and power spectral densities; transmission of noise through LTI systems; equivalent noise bandwidth; available power and noise temperature; noise figure; antenna and sky noise temperatures.

Amplitude Modulation: modulation and demodulation techniques and systems for double sideband suppressed carrier, double sideband large carrier, single sideband, and vestigial sideband; frequency division multiplexing; superheterodyne demodulators; signal-to-noise ratios in AM reception.

Angle Modulation: frequency modulation; phase modulation; narrowband FM; wideband FM; modulation and demodulation techniques and systems for FM signals; demodulation of FM signals; signal-to-noise ratios in FM reception.

Information Theory: measure of information; joint and conditional entropy; channel matrix and channel capacity; source coding theorem; coding algorithms; noiseless coding theorem; code efficiency.

Baseband pulse and digital signalling: pulse code modulation; differential pulse code modulation; delta modulation; digital signalling formats; intersymbol interference.

Bandpass digital signalling: binary signalling; multilevel signalling; minimum-shift keying; comparison of bandpass digital signalling systems.

Educational aims

This topic aims to introduce students to the concept, treatment and analysis of noise in communication systems, the basic concepts of information theory and its application to coding and communication, linear and exponential continuous-wave modulation and demodulation techniques, the methods and issues in transmitting analogue messages along digital communication systems, the range of techniques for modulating and demodulating digital information for transmission through a communication system, and the comparison of different communication systems in terms of issues such as noise, bandwidth and information rate.

Expected learning outcomes
On completion of this topic you will be expected to be able to:

  1. Analyse the time-average effect of noise in communication systems
  2. Understand and apply the modulation and demodulation techniques for continuous-wave communication systems
  3. Apply information theory to the coding of information and the calculation of the capacity of a channel
  4. Understand and apply the modulation and demodulation techniques for digital baseband and bandpass communication systems
  5. Critically evaluate and compare different modulators and demodulators

Key dates and timetable

(1), (2)

Each class is numbered in brackets.
Where more than one class is offered, students normally attend only one.

Classes are held weekly unless otherwise indicated.

FULL

If you are enrolled for this topic, but all classes for one of the activities (eg tutorials) are full,
contact your College Office for assistance. Full classes frequently occur near the start of semester.

Students may still enrol in topics with full classes as more places will be made available as needed.

If this padlock appears next to an activity name (eg Lecture), then class registration is closed for this activity.

Class registration normally closes at the end of week 2 of each semester.

Classes in a stream are grouped so that the same students attend all classes in that stream.
Registration in the stream will result in registration in all classes.
  Unless otherwise advised, classes are not held during semester breaks or on public holidays.