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Electronic theses and dissertations repository

 

Tesi etd-04042008-091601


Thesis type
Tesi di dottorato di ricerca
Author
BACCI, GIACOMO
email address
giacomo.bacci@iet.unipi.it
URN
etd-04042008-091601
Title
Distributed Power Control Techniques Based on Game Theory for Wideband Wireless Networks
Settore scientifico disciplinare
ING-INF/03
Corso di studi
INGEGNERIA DELL'INFORMAZIONE
Commissione
Relatore Prof. Luise, Marco
Parole chiave
  • Pareto optimality
  • Nash equilibrium
  • multiple access techniques
  • large-system analysis
  • impulse radio (IR)
  • game theory
  • frequency-selective multipath
  • energy-efficiency
  • distributed algorithms
  • code division multiple access (CDMA)
  • power control
  • Rake receivers
  • resource allocation
  • ultrawideband (UWB)
Data inizio appello
10/06/2008;
Consultabilità
completa
Riassunto analitico
This thesis describes a theoretical framework for the design and the analysis of distributed (decentralized) power control algorithms for high-throughput wireless networks using ultrawideband (UWB) technologies. The tools of game theory are shown to be expedient for deriving scalable, energy-efficient, distributed power control schemes to be applied to a population of battery-operated user terminals in a rich multipath environment. In particular, the power control issue is modeled as a noncooperative game in which each user chooses its transmit power so as to maximize its own utility, which is defined as the ratio of throughput to transmit power. Although distributed (noncooperative) control is known to be suboptimal with respect to the optimal centralized (cooperative) solution, it is shown via large-system analysis that the game-theoretic distributed algorithm based on Nash equilibrium exhibits negligible performance degradation with respect to the centralized socially optimal configuration. The framework described here is general enough to also encompass the analysis of code division multiple access (CDMA) systems and to show that UWB slightly outperforms CDMA in terms of achieved utility at the Nash equilibrium.<br>
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