DIGITAL TRANSMISSION
Academic year and teacher
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- Versione italiana
- Academic year
- 2014/2015
- Teacher
- VELIO TRALLI
- Credits
- 6
- Didactic period
- Primo Semestre
- SSD
- ING-INF/03
Training objectives
- The aim of this course is to make the student learning the basic principles for the realization of a digital transmission system: detection theory, digital signals with memory and their receivers, equalization techniques and synchronization techniques.
Prerequisites
- None
Course programme
- - Introduction to the principles of binary transmission and detection
- 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, CPM signals, MLSE receivers and their application to CPM signals and to linearly modulated signals with intersymbol interference or coding.
- MSK signals and their receivers, receivers for signals with unknown phase and application to MPSK
- Synchronization in coherent and noncoherent receivers, carrier frequency, phase and timing synchronization, open-loop and closed-loop estimation, performance evaluation
- Characterization of multipath propagation channels, frequency and time selectivity, small-scale stationary models
- Receivers for frequency selective channels, linear equalizers, ZF and MMSE criteria, LMS algorithm, fractionally-spaced equalizers, DFE equalizers, RLS algorithm, channel estimation in MLSE receivers
- Direct-sequence spread-spectrum systems, Rake receiver, CDMA multiple access
- Multicarrier systems, OFDM system and its discrete-time implementation, performance
- Advanced transmission techniques and applications Didactic methods
- Lectures 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 study 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 with a discussion of the chosen advanced topic and some questions addressing the theoretical parts of the programme.
Reference texts
- J.G.Proakis, Digital Communications, McGraw Hill
Wilson, Digital Modulation and Coding, Wiley
U.Mengali, M.Morelli, Trasmissione numerica, McGraw Hill
G.M.Vitetta, Fondamenti di trasmissione numerica con applicazioni alle radiocomunicazioni - Parte I: Le modulazioni numeriche, Pitagora
