The course is taught in English.
This course introduces the most important state-of-the-art techniques used in modern wireless and wired communication systems. The focus is on the system physical layer of mobile networks, from digital modulation to beamforming. The key techniques of 4G and upcoming 5G are analyzed with the aim of understanding their impact on different applications, and their possible evolution. This course is useful for all students interested to digital transmission, both in the Communications and Computer Networks Engineering Degree and in the Electronic Engineering Degree.
This course is focused on the physical layer of modern Communication Systems.
The key techniques of the systems are introduced and studied, including multiplexing, multiple access, frame synchronization, CRC for error detection, basic block codes for error correction, randomizers, modulations, OFDM.
Space links and 5G are taken as case studies.
The course is divided in 6 sections, for each section the students must solve the proposed assignments by writing Matlab or Python programs and preparing a report.
This course is useful to any communications engineer who wants to design or analyze the physical layer of a wireless communication system, for example a mobile network or a space system.
At the end of this course, the students know the key characteristics of the considered communication systems, the most advanced techniques used for wireless and wired systems, and the practical scenarios and applications where they are used. In particular, they have an in-depth knowledge of the physical layer constituent blocks of: OFDM-based systems, 4G-LTE and 5G-New Radio systems. This way, the students acquire the ability to contribute to the design and the management of these state-of-the-art telecom systems.
At the end of this course, the students will know the key characteristics of modern communication systems, the most advanced techniques used for wireless and wired systems, and the practical scenarios and applications where they are used (especially space communication and 5G).
In particular, they will have an in-depth knowledge of the physical layer constituent blocks from the bits to the OFDM modulator.
Moreover, thanks to the course structure based on assignments and learning-by-doing, they will be able to understand, analyze the key blocks of any Communication Systemsm to write programs in Matlab or Python to simulate them and describe the results by a professional technical report.
Basic notions of digital modulations and signal processing.
Basic notions of probability and signal processing (Fourier Transform).
Main topics of the course:
- Review of wireless systems: Digital modulations (PSK, QAM), coding, multiple access schemes, channel models (10 h)
- OFDM and modern techniques for wireless and wired systems (20 h)
- 4G LTE mobile networks: physical layer (10 h)
- New 5G systems physical layer: requirements, applications and technical solutions from modulation to MIMO and beamforming (20 h)
Main topics of the course:
- Introduction to Communication Systems (4h)
- Introduction to wireless channels (AWGN, multipath fading, Doppler) (6h)
- Multiplexing (TDM/FDM) (2h)
- Multiple Access (TDMA, FDMA, CDMA, introduction to NOMA) (6h)
- Block diagrams of the Physical Layer of a Communication System (e.g., satellite link or 5G data channel) (2h)
- Framing and introduction to frame sync (4h)
- Introduction to error detection (CRC), error correction (block codes), and ARQ (10h)
- Randomizer (2h)
- QAM modulations (4h)
- OFDM modulation (14h)
- Use cases and relative link budgets: space links and 5G (6h)
During the course we host seminars and presentations from ICT companies on state-of-the-art topics, offering thesis and internships, too. They introduce students to companies¿ vision on current and future systems.
The course is organized in six sections. For each section, the teacher presents the topic and proposes an assignment. The students must write Matlab or Python programs to solve the problems and prepare a report to discuss the results. For each section, we will offer tutoring to help the students with their programs.
During the course we also host seminars and presentations from ICT companies on state-of-the-art topics.
Teacher¿s material, available on the course web portal.
Proakis-Salehi ¿Communication Systems Engineering¿,
Sesia-Toufik-Baker ¿LTE, The UMTS Long Term Evolution: From Theory to Practice¿,
Erik Dahlman, Stefan Parkvall, Johan Sk¿ld, ¿5G NR The next generation wireless access technology¿
Presentations offered by Telecom companies.
Teacher material, available on the course web portal.
Proakis-Salehi "Communication Systems Engineering"
Erik Dahlman, Stefan Parkvall, Johan Skold, "5G NR The next generation wireless access technology"
Modalità di esame: Prova orale facoltativa; Elaborato progettuale individuale;
Exam: Optional oral exam; Individual project;
Written exam on course¿s topics (usually two hours and six questions, no books, no notes, highest mark = 30 cum laude).
The assessment is made of six questions randomly extracted from a list prepared at the end of the course.
Questions reflect key understanding the students should possess on the studied systems, the constituent blocks of their physical layer, and their most important applications.
Gli studenti e le studentesse con disabilità o con Disturbi Specifici di Apprendimento (DSA), oltre alla segnalazione tramite procedura informatizzata, sono invitati a comunicare anche direttamente al/la docente titolare dell'insegnamento, con un preavviso non inferiore ad una settimana dall'avvio della sessione d'esame, gli strumenti compensativi concordati con l'Unità Special Needs, al fine di permettere al/la docente la declinazione più idonea in riferimento alla specifica tipologia di esame.
Exam: Optional oral exam; Individual project;
The scope of the exam is to verify that the student is able to understand, simulate, and discuss the key blocks of a wireless communication system, and to present the results of the analysis in a technical report.
The course is divided in 6 section. For each section an assignment (to be solved individually) is proposed. The student must deliver a pdf report containing all the results, the figures and the required answers and all the written Matlab or Python programs. Each assignment is evaluated and receives a mark (max mark = 30). To encourage the students to stay aligned to the course, the students who deliver their assignment withing 2 weeks from when it is assigned received 2 more bonus points (max mark = 32).
An extra assignment (or an oral exam) is proposed to students who want to further increase their mark (max +3/30 for the final mark).
Students who get at least 32 receive 30 cum laude.
In addition to the message sent by the online system, students with disabilities or Specific Learning Disorders (SLD) are invited to directly inform the professor in charge of the course about the special arrangements for the exam that have been agreed with the Special Needs Unit. The professor has to be informed at least one week before the beginning of the examination session in order to provide students with the most suitable arrangements for each specific type of exam.