Search    Print

Segnali Numerici
Digital Signals
Franco Chiaraluce

Seat Ingegneria
A.A. 2016/2017
Credits 9
Hours 72
Period I
Language ENG

Prerequisites
The Course requires the knowledge of the basic concepts of telecommunications.

Learning outcomes
KNOWLEDGE AND UNDERSTANDING:
To deepen the topics relative to the characterization of digital signals and their usage in a telecommunication system.
CAPACITY TO APPLY KNOWLEDGE AND UNDERSTANDING:
The student shall be able to process digital signals in view of optimizing the performance of digital communication systems. This way, he will acquire a series of vocational skills, like: 1. the ability to develop simulators of TLC systems able to replicate the behavior of real transmission systems; 2. the ability to define suitable modulation and coding schemes able to comply with prefixed quality targets, for example in terms of error rate and occupied bandwidth. The student shall demonstrate to be able to apply the knowledge acquired also in the framework of a project, based on Matlab, to develop during the course. Check of learning will consist in an oral test.
TRANSVERSAL SKILLS:
The software project to develop during the course will be executed in groups and will contribute to improve the ability of the students to cooperate, communicate and elaborate, as well as the ability to draw shared conclusions.

Program
Contents (Frontal lectures, 54 hours) - Binary sequences: generation through LFSR and chaotic algorithms. - Optimal receiver in the presence of thermal noise and bandwidth limitations (hard detection). - Continuous phase modulations. - Equalization techniques for the multipath channel. - Viterbi's Algorithm with hard decision. - Pragmatic approach to block and convolutional codes for error correction. - Examples of turbo codes and their use in the TLC standards. - Spread spectrum techniques. - Outline of ultra-wide bandwidth systems. - Channel capacity. - Introduction to cryptography. Classroom exercises (18 hours) - Simulation of a 2-PSK system.

Development of the examination
LEARNING EVALUATION METHODS
The exam consists of an oral test. If necessary, the questions requiring the execution of short calculations are answered in written form during the oral test. The student is asked to illustrate the theoretical foundations and examples of application of digital signals in the framework of a telecommunication system. He must also demonstrate to be able to apply the knowledge acquired in the framework of a software project, whose target is the simulation of the performance of a digital modulation scheme in the presence of thermal noise.

LEARNING EVALUATION CRITERIA
The student must demonstrate to possess an adequate knowledge of the course's contents, exposing them in a sufficiently correct way, by using the right technical notation and by showing an adequate capacity to formalize the problems, also as regards the mathematical issues. The maximum mark is reached by demonstrating to have a deep and thorough knowledge of the topics, and a complete control of the technical and formal language.

LEARNING MEASUREMENT CRITERIA
The learning level is measured by the student's capacity to demonstrate to be able to process digital signals, though the methods and tools provided in the course, with the goal to optimize the performance of digital communication systems.

FINAL MARK ALLOCATION CRITERIA
The oral exam consists of two or three questions, depending on the topics discussed during the interview. Each answer receives a mark ranging between 0 and 15 (for the case of two questions) or between 0 and 10 (for the case of three questions). Laude is assigned to those students who, having reached the maximum mark, demonstrate a thorough knowledge of the subjects.

Recommended reading
1. Set of lectures provided by the teacher, that can be found in the university Moodle platform. 2. John G. Proakis, Masoud Salehi, “Communication Systems Engineering”, 2nd Edition, Prentice Hall, 2002.

Courses

• Ingegneria Elettronica (Corso di Laurea Triennale (DM 270/04))