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Browsing by Author "Aboura Lamia Touria"

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    Evaluation des performances du système MC-MC-CDMA sur un canal multi trajet
    (2014-12-16) Aboura Lamia Touria; Encadreur: Djebbari Ali,
    Résumé : Cette thèse propose d’étudier une nouvelle méthode de transmission combinant les techniques d’accès multiples, CDMA, à celles des codes multiples et des porteuses multiples, qu’on appelle MultiCode MultiCarrier CDMA, ou MC-MC-CDMA. Cette technique fort avantageuse, semble être très intéressante pour les systèmes de communications sans fil de prochaine génération. Une analyse exacte du SNIR est effectuée et l’effet du canal multi trajets sur les performances du système de transmission MC-MC-CDMA est évalué; on s’intéresse principalement à l’effet du gain ainsi qu’au profil d’intensité des trajets. Mots clés : MC-MC-CDMA, MC-DS-CDMA, Multi Code CDMA, canal multi trajet, SNIR, MIP, gain du trajet Abstract: This thesis proposed to analysis a new method of transmission combining multiple access techniques, CDMA, to multi code and multi carrier techniques, denoted as Multi Code Multi Carrier CDMA or MC-MC CDMA. This system is suitable for high rate transmission and multirate services as required in the next generation wireless cellular system. In this thesis, an exact SNIR analysis is carried out and the effects of multipath fading channel with different multipath intensity profile (MIP) and different fading parameter on MC MC-CDMA system are evaluated; Keywords : MC-MC-CDMA system, MC-DS-CDMA, Multi Code CDMA, Nakagami fading channel, SNIR, MIP, fading parameter. :ملخص تقترح هذه االطروحة دراسة طريقة اتصال جديدة تستعمل التقسيم متعدد الرموز CDMA مع التهجين المتعدد مع نواقل متعددة OFDM مسماة CDMA-MC-MC تبدو هذه التقنية مفيدة و مثيرة االهتمام النظمة االتصاالت الالسلكية نقترح عبارة جديدة لـ SNIR و نقيم اثر قناة متعددة المسار على اداء نظام النقل. كلمات مفتاحية التقسيم متعدد الرموز, التهجين المتعدد, االتصاالت الالسلكية, قناة متعددة المسار
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