Course Catalogue

LJMU Partner Taught

This module aims to describe the main components of a communication system and their purpose by underlying the principles of communication systems. Further this module introduces the modulation techniques, Signal transmission along with the transmission line. Later intend to introduce the antenna theory along with the wave propagation.

Outline Syllabus:Elements of analogue and digital communication systems: the transmitter, channel and the receiver E.g.: wired and wireless systems; simplex, duplex and half-duplex methods. Characteristics of electro-magnetic waves: frequency, wavelength and velocity and their interrelationship; the electro-magnetic spectrum and frequency/wavelength allocations. Signal spectra: time and frequency domains; fundamental and harmonic frequencies; complex waveforms; digital signals. e.g. unipolar, bipolar, return-to-zero (RTZ), non-return to-zero (NRZ) Logarithmic relationships: the need for logarithmic representation; the Decibel and its Common derivatives (dBm, dBW and dBR) and typical applications including link budgets. Sources and effects of noise: sources e.g. internal/external, natural/man-made; types e.g.: Johnson, Shott, Partition; cumulative effects in cascaded/sequential systems; signal-to-noise ratio; noise figure and noise factor; noise temperature. Noise calculations: e.g. thermal/Johnson noise, signal-to-noise ratio, noise figure, noise Factor Bandwidth and information capacity: Shannon-Hartley theorem e.g.: relationship to the available bandwidth and the signal-to-noise ratio; bandwidth requirements for typical applications (voice, radio and television broadcasting); the implications for both analogue and digital signals Channel impairments: attenuation and other losses; bandwidth limitation; phase delay; effects on complex signals; inter-symbol interference; bit error rates (typical examples) Signal Modulation, Baseband and pass band modulation, Analogue and digital modulation. Analogue modulation methods: amplitude/frequency/phase; pulse modulation methods e.g. pulse amplitude (PAM), pulse position (PPM), pulse duration/width (PDM/PWM) Modulation methods for digital signals over analogue networks: e.g. amplitude shift keying (ASK), frequency shift keying (FSK), phase shift keying (PSK), quaternary phase shift keying (QPSK), quaternary amplitude modulation (QAM) Digital modulation methods: pulse code modulation (PCM) Multiplexing techniques: space division; frequency division; time division; wavelength Division