


Politecnico di Torino  
Academic Year 2010/11  
01NVCNX Signal processing and communications 

1st degree and Bachelorlevel of the Bologna process in Electronic Engineering  Torino 





Subject fundamentals
The goal of the first part of the course is to give the foundations of signal processing and communication system. Since the topics are strongly multidisciplinary, the knowledge gained is useful in almost all of the subsequent courses attended by the student.
In the first part of the course, the foundations of signal processing in the time domain and in the frequency domain are introduced, both for deterministic and random signals. In the second part, analog and digital communication systems are presented. 
Expected learning outcomes
 Knowledge of the classification of signals. Knowledge of frequency analysis, both in continuoustime and in discretetime. Knowledge of linear timeinvariant (LTI) systems, as well as of their representation in the time and frequency domains. Knowledge of the basic types of filters. Knowledge of random processes and of their spectral representation.
 Ability to classify signals with respect to their properties. Ability to transform and analyze a signal in the frequency domain. Ability to classify and analyze an LTI system in the time and frequency domains.  Knowledge of amplitude modulation analog transmission systems and ability to calculate the relative system performances.  Knowledge of the methods to transmit an analog signal by means of a digital transmission system and ability to calculate the system performances.  Knowledge of digital transmission systems, baseband and not baseband, binary and multilevel, and ability to calculate the systems performances.  Background knowledge about source coding and ability to calculate the performances. 
Prerequisites / Assumed knowledge
Real and complex analysis of one and multidimensional functions. Probability theory. Gaussian random variables. First order linear differential equations. Dirac impulse function.

Contents
 Classification of signals; energy and power (8 hours)
 Fourier series and transform (10 hours)  LTI systems, impulse response and transfer function (8 hours)  Energy spectrum and autocorrelation function (4 hours)  Periodic signals and power spectrum (4 hours)  Sampling theorem (4 hours)  Fast Fourier Transform (4 hours)  Introduction to random processes (8 hours)  Geometric representation of signals (4 hours)  Introduction to timefrequency analysis (2 hours)  Communication systems introduction (2 hours)  Amplitude Modulation (8 hours)  Pulse Code Modulation Systems (6 hours)  Pulse Amplitude Modulation and Signals geometrical representation (4 hours)  Bit Error Rate Performances for Digital receivers with real filtering, optimum filtering and ideal low pass filtering (6 hours)  Power Spectrum analysis for baseband digital modulations (4 hours)  PSK, QPSK and QAM Digital modulations: Bit Error Rate and bandwidth analysis (12 hours)  Frequency Division Multiplexing and Time Division Multiplexing (2 hours)  Huffman coding (4 hours) 
Delivery modes
Exercises on the course topics are solved during class. Exercises can be solved directly by the lecturer, or proposed by the lecturer and solved by the students with his help.

Texts, readings, handouts and other learning resources
Suggested references:
7. L. Lo Presti e F. Neri, L'analisi dei segnali, CLUT, 1992. 8. L. Lo Presti e F. Neri, Introduzione ai processi casuali, CLUT, 1992. 9. A. Papoulis e S. U. Pillai, Probability, Random Variables and Stochastic Processes, McGrawHill, 2002. 10. Leon W. Couch, Fondamenti di telecomunicazioni, APOGEO, 2002 11. G. Taricco, Comunicazioni Elettriche con elementi di teoria dell'informazione, CLUT, 2002 12. G. Albertengo, A. Bianco e M. Mondin, Esercizi svolti di Comunicazioni Elettriche, CLUT,1997. The course textbooks, chosen among the suggested references, will be indicated by the lecturer during class. 
Assessment and grading criteria
For the first part of the course, a written examination made by 78 multiple choice questions is required. Every question is an exercise whose solution requires only the Fourier transform table provided by the lecturer. The score is the sum of the grades granted for every exercise solved correctly.
For the second part of the course, a written examination on designing, performances calculation and theory questions on transmission systems. 
