WIRELESS ECOSYSTEMS
Academic year and teacher
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- Versione italiana
- Academic year
- 2022/2023
- Teacher
- VELIO TRALLI
- Credits
- 6
- Didactic period
- Primo Semestre
- SSD
- ING-INF/03
Training objectives
- The course presents the basic principles and technologies of the digital communication systems for the wireless networks.
The student will gain the knowledge of:
- the basic principles of detection theory and the methods to design receivers for modulated and encoded digital signals
- the techniques for digital communication over wireless channels: equalization techniques, multicarrier systems, spread-spectrum techniques, multiple-input multiple-output (MIMO) systems
- the main wireless network technologies: cellular systems, wireless LAN, short-range low-power systems for IoT.
At the end of the course the student will be able to:
- understand and define the structure of the basic digital communication systems and the algorithms behind the different functionalities
- understand and define basic techniques for digital transmission over wireless channels. Prerequisites
- Knowledge of the fundamentals of signal theory and communication systems, probability theory and statistics, linear algebra
Course programme
- - Introduction to digital communication systems, signal space and geometrical representation of signals, transmission with M waveforms, maximum likelihood and minimum distance estimation, probability of error
- Digital modulated signals with memory, continuous phase modulation (CPM) signals, maximum likelihood sequence estimation (MLSE) receivers and their application
- Characterization of wireless channels, multipath propagation channels, frequency and time selectivity, small-scale stationary models, channel capacity and transmission over wireless channels
- Receivers for frequency selective channels, linear equalizers, ZF and MMSE criteria, LMS and RLS algorithm, DFE equalizers
- Direct-sequence spread-spectrum systems, Rake receiver, code division multiple access (CDMA)
- Multicarrier systems, OFDM system and its discrete-time implementation, performance
- MIMO systems: capacity and communication methods
- Multiuser systems: multiple access, resource allocation, multiuser diversity
- Cellular networks: network planning and capacity
- Cellular wireless networks: 2G, 3G, 4G
- Wireless LAN and IEEE 802.11 systems
- Bluetooth and IEEE 802.15 systems Didactic methods
- The course is based on classroom lessons that cover all the items in the programme. The presentation of the theory is followed by selected examples or exercises. At the end of the course, each student is required to individually investigate an advanced topic chosen in a list provided by the teacher. This investigation includes reading and understanding a book section and/or a scientific article, and the composition of a report on the topic.
Learning assessment procedures
- The final examination is suitably organized to check the achievement of the learning objectives as outlined above. It consists of a single oral part that includes the discussion of the chosen advanced topic and some questions addressing the theoretical parts of the programme. If requested, English can be used for the final exam.
Passing the final exam is the proof that knowledge and abilities outlined in the training objectives of the course have been achieved. Reference texts
- 1. J.G.Proakis, Digital Communications, McGraw Hill
2. A.S.Molisch, Wireless communications, Wiley
3. M.Schwartz, Mobile wireless communications, Cambridge
4. C.Beard, W.Stallings, Wireless Communication Networks and Systems, Pearson
6. U.Mengali, M.Morelli, Trasmissione numerica, McGraw Hill
4. G.M.Vitetta, Fondamenti di trasmissione numerica con applicazioni alle radiocomunicazioni - Parte I: Le modulazioni numeriche, Pitagora
The content of the course is almost completely covered by the textbooks 1 and 2. The other textbooks, together with 1 and 2, can be used to enlarge the knowledge on specific topics.
