Date de Soutenance: 29/06/2005 Composition du Jury:

First and foremost, I would like to thank my supervisor Prof Christian Bonnet for his encouragement and support over the past years. He gave me a lot of freedom with my research as well as the possibility to implement our work in Eurecom Platform and to present my results in several international conferences. I wish to express my gratitude to Yan Moret who helps me so much with my research, simulation work, and publication reviewing. I am grateful to the members of my doctoral committee for their time, support and useful comments. My work with Christian Bonnet, Yan Moret and Eurecom Platform team gave me the chance to gain a valuable experience. I also want to thank all the staff in the Mobile Communications Department and Institut Eurecom for their warm reception. We have spent so much wonderful time together. I will never forget them. I which to thanks all Eurecom PhD candidate especially in mobile communication department, Maxim, Mari, Navid, Souad, Younes and all th