ΗΥ-330 fall semester 2016

University of Crete Computer Science Department Stefanos Papadakis

Introduction to telecommunication systems theory

<HY-330> Introduction to telecommunication systems theoryCSD.UoC Stefanos Papadakis fall 2016

Analog & Digital Signals

Analog signal

Discrete time signal

Discrete time and level signal a.k.a. Digital Signal

<HY-330> Introduction to telecommunication systems theoryCSD.UoC Stefanos Papadakis fall 2016

Telecommunication System

<HY-330> Introduction to telecommunication systems theoryCSD.UoC Stefanos Papadakis fall 2016

Basic Concepts

System

Telecommunication

Analog telecommunication system

Digital telecommunication system

<HY-330> Introduction to telecommunication systems theoryCSD.UoC Stefanos Papadakis fall 2016

Telecommunication Procedure

Message generation

Message representation

Coding

Transmission - Reception

Message Decoding

Message reproduction

<HY-330> Introduction to telecommunication systems theoryCSD.UoC Stefanos Papadakis fall 2016

Basic Elements

Transmitter

Tx

Receiver

Rx

Channel

<HY-330> Introduction to telecommunication systems theoryCSD.UoC Stefanos Papadakis fall 2016

Telecommunication Resources

Band / Carrier Frequency

Tx Power

Channel Bandwidth

<HY-330> Introduction to telecommunication systems theoryCSD.UoC Stefanos Papadakis fall 2016

Telecommunication Impairments

Noise & Interference

Channel distortion

Technological limitations

<HY-330> Introduction to telecommunication systems theoryCSD.UoC Stefanos Papadakis fall 2016

AWGN channel

Linear Gaussian channel

Telecommunication Impairments

<HY-330> Introduction to telecommunication systems theoryCSD.UoC Stefanos Papadakis fall 2016

Channel Capacity

SNR/SINR

Shannon–Hartley theorem:

Thermal Noise:

SNR =Psignal

Pnoise

C = B log2(1 +S

N)

P = kBTB