Telecommunications

Objectives

Introduction to the telecommunications engineering basic concepts, including the modeling of analog and digital sources and the transmission techniques. Description of the signals and noise models adequate to the performance analyses of analog and digital transmission systems. Performance analysis of transmission systems applied to the context of current telecommunication ssystems.

Program

I Introduction
Framework of the curricular unit in the context of current telecommunications systems. Model of a telecommunications system.
II. Analog modulation of sinusoidal carriers. Modulation and demodulation AM, FM and PM. Bandpass signals and noise. Performance in the presence of noise.
III. Digital Systems in Base Band
Digitalization of analog sources - PCM. Sampling and Quantization. Quantization error and noise. Optimal receiver, adapted filter andinter symbolic interference (ISI). Shaping of the elementary impulse (Nyquist criterion). Line codes. Eye diagram.
IV. Digital Systems in Band Pass
Motivation for digital modulation. Vector perspective. ASK, PSK and FSK systems. Multisymbol signaling (QPSK, BPSK, QAM).Detection.
V. Introduction to Information Theory
Amount of information, entropy. Huffman codes, encoding for error control.
VI. Introduction to optical communications and radio. Generic descriptions and performance parameters

Teaching Methodologies

50% continuous evaluation / 50% non-continuous evaluation

Bibliography

Communication Systems - 5th edition, Simon Haykin, Michael Moher, 2017, International Student Version - Wiley; Sebenta doProfessor ; Slides do apoio visual utilizado nas aulas,