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Archivio digitale delle tesi discusse presso l’Università di Pisa

Tesi etd-10222013-170445


Tipo di tesi
Tesi di laurea magistrale
Autore
PIZZO, ANDREA
URN
etd-10222013-170445
Titolo
Analysis and Implementation of PAPR reduction algorithms for C-OFDM signals
Dipartimento
INGEGNERIA DELL'INFORMAZIONE
Corso di studi
INGEGNERIA DELLE TELECOMUNICAZIONI
Relatori
relatore Sanguinetti, Luca
tutor Marchetti, Leonardo
tutor Pellegrini, Vincenzo
relatore Prof. Luise, Marco
Parole chiave
  • DVB-T2
  • high power amplifier
  • OFDM
  • PAPR
Data inizio appello
02/12/2013
Consultabilità
Completa
Riassunto
Nowadays multicarrier modulation has become a key technology for communication systems; for example C-OFDM schemes are used in wireless LAN (802.11a/g/n), terrestrial digital television (DVB-T) and audio broadcaster (DAB) in Europe, and discrete multitone (DMT) in x.DSL systems.

The principal difficulty with OFDM is the occurrence of the coherent alignment of the time domain parallel signals at the transmitted side which forces system designer to introduce either additional hard computationally device or a suitable power back-off at the high power amplifier in order to cope with the large magnitude signal fluctuation. This leads to a significant increment in computational cost in the former case whereas in a worse allowable power utilization in the latter case with respect to the original system. However since both allowable power and computational cost are subject to a design as well as regulatory limit others solution must be accomplished. Peak reduction techniques reduce maximum-to-mean amplitude fluctuations nominating as a feasible solution. Peak-to-average power ratio is the key metric to measure this amplitude fluctuations at transmitter and to give a clear figure of merit for comparison among different techniques.
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