Learning objectives
Knowledge and understanding
The main goal of this course is to provide students with the ability to understand:
- the analog communication systems and the elements for their design, selection, and analysis;
- the digital communication systems and the elements for their design, selection, and analysis.
Applying knowledge and understanding
The abilities to apply the acquired knowledge and understanding result to be:
- design and analyze the performance of analog communication systems;
- design and analyze the performance of digital communication systems.
Prerequisites
Signal Theory
Course unit content
Introduction--Lowpass equivalent of bandpass deterministic or random signals.
Analog Modulations--Amplitude modulation (AM): signal time-domain expression, spectrum, bandwidth, and transmitted power. DSB and SSB modulations. Detection of AM signals. Detection in the presence of phase and frequency errors. Carrier recovery for AM signals. Frequency modulation (FM) and phase modulation (PM). Bandwidth and transmitted power. Detection of FM and PM signals. The phase-locked loop (PLL). Frequency division multiplexing (FDM).
Digital modulations--Pulse code modulation (PCM), quantization noise. Time division multiplexing (TDM). Baseband digital transmissions. Pulse amplitude modulation (PAM). Matched filter. Error probability for binary and M-ary modulations. Nyquist pulse. Intersymbol interference. Eye diagrams. Equalization. Bandpass digital transmissions.
Full programme
Introduction
- Lowpass equivalent of bandpass deterministic or random signals. (6 hours)
Analog Modulations
- Amplitude modulation (AM): signal time-domain expression, spectrum, bandwidth, and transmitted power. DSB and SSB modulations. Detection of AM signals. Detection in the presence of phase and frequency errors. Carrier recovery for AM signals. (8 hours)
- Frequency modulation (FM) and phase modulation (PM). Bandwidth and transmitted power. Detection of FM and PM signals. (8 hours)
- The phase-locked loop (PLL). (2 hours)
- Frequency division multiplexing (FDM). (2 hours)
Digital modulations
- Pulse code modulation (PCM), quantization noise. (3 hours)
- Time division multiplexing (TDM). (1 hours)
- Baseband digital transmissions. Pulse amplitude modulation (PAM). Matched filter. Error probability for binary and M-ary modulations. Nyquist pulse. Intersymbol interference. Eye diagrams. (12 hours)
- Equalization. (4 hours)
- Bandpass digital transmissions. (4 hours)
Bibliography
Bruce Carlson, Paul B. Crilly, and Janet C. Rutledge:''Communication systems'', 5th edition, McGraw Hill, 2010.
Teaching methods
Lectures and exercises (approximately with a ratio 70%-30%). For the latter, the teacher will solve on the blackboard the exercises assigned to the students one week in advance. In this way, the students can try to solve them at home, will take advantage much more of the interaction with the teacher, and can explain their work.
Assessment methods and criteria
Written (with 2 open questions) and oral exams. It is required to pass the written exam to be admitted to the oral exam. The final mark will be the arithmetic mean of both marks. The written exam is about the design and analysis of a digital communication system, the oral exam on the theoretical aspects. Intermediate written exams will be considered upon students' request. A final project using Matlab is also foreseen.
Other information
COVID-19 WARNING:
without the necessary sanitary conditions and if the students will not be allowed to attend lectures, the Instructor will adopt a "synchronous online" approach, where lectures shall be held in streaming on Teams. A calendar of lectures
will be posted on the web-learning (Elly) site. Possible streaming from physical classrooms, if allowed by University facilities, will be broadcast in a dedicated way, without students being physically present.
Within the same conditions above, the "intermediate written tests" (see section on exams) shall be abolished, thus accessing directly the exam sessions in December/January.
2030 agenda goals for sustainable development
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