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P24H / ELET2480
Communications
Systems
(4 Credits) Semester 1 Level II
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Prerequisites P 14A / PHYS1410 & P 14B / PHYS 1420, and (M 08B/MATH0100, and M 08C/MATH0110 or A-Level Maths or CAPE Maths)
Aim
To understand the modulation techniques used in communications and
to appreciate where they are applied.
Objectives
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- To understand the measurement of noise in communications.
- To know the methods of analog modulation.
- To know digital modulation techniques.
- To appreciate the methods of wireless communication.
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Content |
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Noise |
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Noise and Distortion.Noise Temperature and Bandwidth. Noise Factor
and Noise Figure.
Signal to Noise Ratio. |
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Analog Modulation |
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- Amplitude modulation(AM) and demodulation.
- Single sideband systems.
- Frequency modulation(FM) and phase modulation.
- Carson's rule and its uses.
- FM discriminators.
- The Phase Locked Loop(PLL).
- FM transmitters and receivers.
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Digital Modulation
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- Sampling and Bit rates.
- Bandwidth requirements.
- Pulse Code Modulation(PCM).
- Pulse Width Modulation(PWM).
- Delta Modulation(DM).
- Time Division Multiplexing.
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Wireless Communication
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- Propagation loss in a simple wireless link.
- Principles of Radio and Television. Facsimile and Cellular
telephones.
- Use of geostationary satellites. Global Positioning Systems(GPS).
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Evaluation
One 2-hour paper 60%
One 1-hour in-course test 20%
Practical work 20%
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