Thèse soutenue

Affectation de relais dans les réseaux coopératifs sans fil
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Auteur / Autrice : Amir Minayi Jalil
Direction : Vahid Meghdadi NeyshabouriJean-Pierre Cances
Type : Thèse de doctorat
Discipline(s) : Electronique des Hautes Fréquences et Optoélectronique
Date : Soutenance en 2012
Etablissement(s) : Limoges
Partenaire(s) de recherche : autre partenaire : Université de Limoges. Faculté des sciences et techniques

Mots clés

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Résumé

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In this thesis, we have explored the problem of relay assignment in cooperative networks. The performance of different relay assignment schemes is statistically analyzed, new schemes are proposed to achieve diversity and some algorithms are proposed to find the optimum, permutation based on some existing criteria. As a means for our analysis, first we considered different scenarios where the PDF of the relaying channels' SNR involves order statistics. In the following three sections, we have considered the problem of relay assignment in cooperative networks based on dif­ferent criteria. Each criterion has its own pros and cons, and some are suitable for some network configurations but not for other configurations. We considered each criterion in a suitable network configuration and analyzed its performance. As the performance metric, we calculated the PDF of the end-to-end SNR, the diversity order and the BER. The mentioned criteria are sequential relay assignment (Chapter 4), relay assignment based on max-min criterion (Chapter 5), and relay assignment based on max-sum criterion (Chapter 6). In the last chapter of this thesis, we have proposed a new scheme to achieve diversity in relay channels where we only used the CSI of the source-relay channels. The proposed scheme is based on a distributed implementation of linear block codes or convolutional codes.