ECE2111 - Signals and systems - 2018

This unit provides foundations for the electrical engineering areas of control, signal processing and communications. The unit introduces concepts of continuous-time and discrete-time signals, their sampling and aliasing issues. Complex numbers, in particular, complex exponentials are introduced along with their representation as phasors, leading to periodic waveforms, Fourier series and the signal frequency spectrum. Modification of spectra will be described using FIR filters, discrete-time systems, the unit-sample response, discrete convolution, linear time-invariant systems, convolution integrals, the continuous-time Fourier transform, windowing, DFT, FFT, time-frequency spectrum analysis, spectrogram, and Laplace Transform. Connecting frequency response and time response completes the unit.

On successful completion of this unit, students will be able to:

1. Analyse and manipulate continuous-time and discrete-time signals using appropriate techniques.
2. Evaluate and analyse signals in frequency and time domains.
3. Analyse engineering systems by applying linear time invariant system concepts.
4. Apply the Fourier transform, Laplace Transform, and the discrete Fourier transforms to signals and system problems.
5. Recognise sampling errors and aliasing phenomena.

Continuous assessment: 40%

Examination (2 hours): 60%

Students are required to achieve at least 45% in the total continuous assessment component (assignments, tests, mid-semester exams, laboratory reports) and at least 45% in the final examination component and an overall mark of 50% to achieve a pass grade in the unit. Students failing to achieve this requirement will be given a maximum of 45% in the unit.

3 hours lectures, 3 hours laboratories/tutorials and 6 hours of private study per week.

See also Unit timetable information

Electrical and Computer Systems Engineering