431-327 Communication Systems

Credit Points

HECS Band

Prerequisites

431-221 Fundamentals of Signals and Systems, and 431-325 Stochastic Signals and Systems or 620-201 Probability.

Semester

Contact

Subject Description

On completion of this subject students should: understand techniques for the digital coding of analogue waveforms; understand the causes of, and cures for, interference in digital transmission; understand the effects of noise in analogue and digital communication systems; possess a basic skill in carrying out noise and signal analysis for communication system design.

Review of signals and systems: amplitude and frequency response, bandwidth, distortion, bandpass signals, lowpass equivalent etc; amplitude modulation: DSBLC, DSBSC, SSBSC, VSB, AM circuits, AM radio and television broadcasting; phase-locked loop; Frequency Modulation: theory, Carson's rule, direct and indirect FM, demodulation by frequency discrimination, PLL; Review of bandpass random processes and white, Gaussian noise; noise in AM and FM: SNR calculations, plus threshold effects, and pre-emphasis and de-emphasis filtering; digital communication: sampling and quantisation, regeneration, pulse coded modulation (including differential PCM, and delta modulation), intersymbol interference, matched filter.

Assessment

One written examination not exceeding three hours; practice classes, tests, assignments laboratory reports and project reports, not exceeding 20 pages. Students will be notified of the weighting of assessment components at the beginning of the semester.