Secondary Major in Telecommunications: Compulsory Courses

Learning Outcomes

The course provides the basic principles of cellular mobile communication systems. It also provides the methodologies of analysis and design of these systems. By concluding the course, students are able to

analyze and design basic mobile communication systems by emphasizing in physical layer techniques
recognize, describe and distinguish the characteristics of several type of cells, communication channels and multiple access techniques
analyze and design systems with different requirements of telecommunication traffic and quality links
compute the thresholds of link performance,
compare alternative implementation plans and evaluate the total performance of digital systems

The lab sessions aim to provide a deeper understanding of physical phenomena of propagation in the wireless channel and the simulation of cellular systems.

Course Contents

Initially, basic concepts of Mobile Communications Radiosystems are provided (cell types, communication channel types, basic cellular system operations). Basic Network Access Techniques (Multiple Access Techniques, Random Access Techniques) are discussed. Also, reference is made to the evolution of Wireless Communication Systems (1^st, 2^nd, 3^rd, and 4^th generation cellular systems, Wireless Telephony Systems, Paging Systems, WLANs, WPANs, PMRs). Students are introduced to the concept of cells and frequency reuse (elements from regular hexagon geometry, cellular systems design). Then the basic concepts of telecommunication traffic analysis and systems performance is provided (elements of Queuing Theory, Erlang B model, Erlang C model, spectral performance of cellular systems). In the following the main wireless propagation mechanisms are presented (multipath propagation, Doppler fading and shift, propagation loss, shadowing, coverage area definition, radio channel capacity limits). Interference types (co-channel interference and noise, neighboring channel interference) as well as handover and performance techniques (categorization of handover techniques, advantages and disadvantages of techniques, stable performance, dynamic performance, elastic performance) are discussed and compared. Techniques for improving spectral efficiency (sectoring, cell splitting) are then analyzed. Finally, elements and techniques of physical layer design (modulation and coding techniques, co-channel interference mitigation techniques) are presented and a presentation of standardized Mobile Communications Systems (GSM, GPRS, 3G and 4G) is presented.

In addition, extra content (in evdoxos.ds.unipi.gr) like articles, audiovisual lectures and Internet addresses, as well as exercises for student’s practice are posted electronically. Case studies, exemplary problems and methods for solving them are presented.

Learning Outcomes

Aim of this course is the understanding of methods for the analysis and design of satellite communication systems. By concluding the course, students are able to

understand the specific features of satellite communication networks as well as their application field
familiarize with terms and techniques for the evaluation of the performance and of the availability of satellite links
identify, describe and distinguish the characteristics of different orbits
analyze and design links of particular telecommunication requirements
analyze and design appropriate criteria, on the computation of performance threshold values for the links, on the comparison of alternative implementation plans and the evaluation of the final performance of digital systems

By concluding the lab sessions students are able to

use mathematical tools, identify and apply theory to real-world problems
design and implement simple link budget models

Course Contents

Initially, the basic elements of the orbit mechanics are given (Kepler orbits, motion equations, track parameters, Earth’s orbit, relative satellite and earth geometry and the parameters determining the relative position of earth stations and satellite). Next, the basic principles of Satellite Link Analysis and Design are discussed (typical antenna parameters, transmitted power, received signal power, link budget for clear sky conditions, factors affecting transmission, noise and its impact on satellite telecommunications, quality indicator reception equipment, techniques for compensating the effects of the transmission medium, signal to noise ratio for end-to-end radio-links, power gain at the satellite). Also, the most common broadcast techniques are presented (techniques mainly for digital broadcasting of baseband signals, modulation and applications in telephone and television systems). Finally, the most frequently used Multiple Access Techniques in Satellite Networks (FDMA, TDMA, CDMA) are analyzed.

Associated scientific Journals

ΙΕΕΕ Transactions on Antennas & Propagation
ΙΕΕΕ Journal on Selected Areas in Communications
Wiley Journal on Satellite Communications & Networking
IEEE Communications Magazine

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Κατεύθυνση: Secondary Major in Telecommunications: Compulsory Courses

Mobile Communication Systems

Learning Outcomes

Course Contents

Recommended Readings

Associated scientific Journals

Satellite Communications

Learning Outcomes

Course Contents

Recommended Readings

Associated scientific Journals

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