{"id":235,"date":"2011-09-30T10:26:47","date_gmt":"2011-09-30T08:26:47","guid":{"rendered":"https:\/\/samovar2022.int-evry.fr\/index.php\/2011\/09\/30\/soutenance-these-de-petros-ramantanis\/"},"modified":"2020-09-04T18:47:00","modified_gmt":"2020-09-04T16:47:00","slug":"soutenance-these-de-petros-ramantanis","status":"publish","type":"post","link":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/2011\/09\/30\/soutenance-these-de-petros-ramantanis\/","title":{"rendered":"SOUTENANCE : Th\u00e8se de Petros Ramantanis"},"content":{"rendered":"

Vendredi 30 Septembre<\/strong> 2011 \u00e0 14<\/strong>h00 Amphi 10<\/strong>. \u00ab\u00a0Contribution to the analysis of optical transmission systems using QPSK modulation\u00a0\u00bb<\/p>\n

Jury<\/strong><\/p>\n

– M. Alberto Bononi, Professeur \u00e0 l’Universit\u00e9 de Parme, rapporteur
\n– M. Philippe Emplit, Professeur \u00e0 l’Universit\u00e9 Libre de Bruxelles, rapporteur
\n– M. Georges Alqui\u00e9, Professeur \u00e0 l’Universit\u00e9 Pierre et Marie Curie, examinateur
\n– M. Jean-Christophe Antona, Ing\u00e9nieur de recherche \u00e0 Alcatel Bell Labs France, Examinateur
\n– M. Badr-Eddine Benkelfat, Professeur \u00e0 T\u00e9l\u00e9com SudParis, Directeur
\n– M. Yann Frignac, Ma\u00eetre de conf\u00e9rences \u00e0 T\u00e9l\u00e9com SudParis, Encadrant<\/p>\n

R\u00e9sum\u00e9<\/strong><\/p>\n

\u00ab\u00a0Un ensemble de solutions technologiques ont permis l’explosion des t\u00e9l\u00e9communications sur fibre optique dans les ann\u00e9es pr\u00e9c\u00e9dentes. Historiquement, le format de modulation le plus r\u00e9pandu (i.e. la fa\u00e7on la plus utilis\u00e9e pour \u00ab v\u00e9hiculer \u00bb l’information dans le canal optique) \u00e9tait un format de modulation pour lequel l’information \u00e9tait cod\u00e9e sur l’amplitude du signal optique. La r\u00e9apparition r\u00e9cente de la d\u00e9tection coh\u00e9rente, une technique abandonn\u00e9e par le pass\u00e9 \u00e0 cause des limitations technologiques de l’\u00e9poque, a donn\u00e9 la possibilit\u00e9 aux ing\u00e9nieurs d’envisager des formats de modulation beaucoup plus complexes que le format NRZ, notamment des formats de modulation pour lesquels l’information est cod\u00e9e sur la phase du signal optique. De plus, la d\u00e9tection coh\u00e9rente a \u00e9galement offert la possibilit\u00e9 de r\u00e9duire l’impact des effets physiques de la transmission avec un traitement du signal adapt\u00e9 au niveau du r\u00e9cepteur.
\nMa th\u00e8se porte sur l’\u00e9tude du format de modulation Quadrature Phase Shift Keying (QPSK) dans le cadre des transmissions optiques et plus pr\u00e9cis\u00e9ment comment les signaux optiques portant ce format sont affect\u00e9s par les m\u00e9canismes physiques de la propagation dans la fibre pour diff\u00e9rents types de configuration des syst\u00e8mes de transmission. Ces \u00e9tudes peuvent ensuite orienter le d\u00e9veloppement d’algorithmes pour la compensation des distorsions du signal.\u00a0\u00bb<\/p>\n

\n","protected":false},"excerpt":{"rendered":"

Vendredi 30 Septembre 2011 \u00e0 14h00 Amphi 10. \u00ab\u00a0Contribution to the analysis of optical transmission systems using QPSK modulation\u00a0\u00bb Jury – M. Alberto Bononi, Professeur \u00e0 l’Universit\u00e9 de Parme, rapporteur – M. Philippe Emplit, Professeur \u00e0 l’Universit\u00e9 Libre de Bruxelles, rapporteur – M. Georges Alqui\u00e9, Professeur \u00e0 l’Universit\u00e9 Pierre et Marie Curie, examinateur – M. 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