ETD system

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Tesi etd-08222008-002954


Thesis type
Tesi di laurea specialistica
Author
PELLEGRINI, VINCENZO
URN
etd-08222008-002954
Title
Soft-DVB: A Fully-Software DVB-T Modulator Based on the GNU-Radio framework
Struttura
INGEGNERIA
Corso di studi
INGEGNERIA DELLE TELECOMUNICAZIONI
Supervisors
Relatore Prof. Luise, Marco
Relatore Prof. Giannetti, Filippo
Relatore Dott. Bacci, Giacomo
Parole chiave
  • SDR
  • Software Radio
  • DTT
  • Media Broadcasting
  • GNURadio
  • OFDM
  • DVB-T
Data inizio appello
29/09/2008;
Consultabilità
Completa
Riassunto analitico

Introduction
Full-Hardware solutions: a heavy burden for further DSP development
A real world example: FM Broadcast, persistence of an old technology
Modern, Competitive Multimedia Broadcasting Infrastructure: a Wishlist
The Full-Software proposal: a bridge between research effort and deployment
The Soft-DVB concept implementation: a feasibility proof
Advantages of a Fully-Software solution for ETSI DVB-T signal generation

1 The DVB-T Standard for broadcasting terrestrial digital television
Main features
Typical DVB-T propagation scenarios: Rayleigh and Ricean Channels
Analysis of ETSI DVB-T functional blocks

2 The OFDM Modulation
Overview
Usage within ETSI DVB-T: benefits and implementation choices
Orthogonality of Signals and Spectral Efficiency
Multipath Resistance

3 Soft-DVB
Preliminary choices: The USRP system and the GNURadio Framework
Soft-DVB Architecture
Development Stages: the check-dumps
TPS Implementation
Hardware trivia and Headaches
On Air... pardon, on Coax
Signal Debugging
On Air, Actually!

4 Optimization
CPU-time vs Memory Trade-Off
Bit-Level Operations and the convolutional encoder example
Vectorized vs Scalar Structures

5 Implementation Results
Laboratory Benchmarks
Final Implementation Results

6 Real World Deployment scenarios and Perspectives
Emergency Broadcasts
Mission-Dedicated Broadcasts
Highway Traffic Information Systems
Quick and Cheap Network: Ideas for a new Media Broadcasting Model
On Site Broadcasting
Parallel CPU Architectures: a huge computing power boost

7 Conclusions
File