Objectif The underlying challenges in mobile and wireless systems are the unavoidable interference in wireless environments, and the time variance of the system. In general, high data rates give rise to frequency selective propagation whereas mobility induced Doppler shifts introduce time selectivity in wireless links. In order to develop efficient systems in these environments, an engineering solution is to use training signals. We analyse the use of training and develop design methodologies for these systems. As time and frequency selectivity increase, the optimal use of the training becomes more crucial.In particular, we study the combined effect of several factors at play in multi-carrier systems, in order develop a global framework of analysis. We study how these factors compare to a single carrier system operating over the same channel, in order to explore the gains of using multi-carrier transmission in a training-aided system. We also investigate the role of training in time-division duplex (TDD) systems. When beam forming in the forward link is used, the training in reverse and forward links have a unique interaction in such systems. We develop novel analyses and design techniques for training-aided TDD systems based on this interaction. Champ scientifique ingénierie et technologiegénie électrique, génie électronique, génie de l’informationingénierie de l’informationtélécommunicationréseau de télécommunicationsréseau mobile4Gingénierie et technologiegénie électrique, génie électronique, génie de l’informationingénierie de l’informationtélécommunicationtechnologie radio Mots‑clés Training signal beamforming channel estimation equalization multicarrier systems multiuser systems pilot aided systems Programme(s) FP6-MOBILITY - Human resources and Mobility in the specific programme for research, technological development and demonstration "Structuring the European Research Area" under the Sixth Framework Programme 2002-2006 Thème(s) MOBILITY-4.2 - Marie Curie International Reintegration Grants (IRG) Appel à propositions FP6-2004-MOBILITY-12 Voir d’autres projets de cet appel Régime de financement IRG - Marie Curie actions-International re-integration grants Coordinateur HACETTEPE UNIVERSITY Adresse Beytepe Ankara Turquie Voir sur la carte Liens Site web Opens in new window Contribution de l’UE Aucune donnée
