| Etablissement | Université de Sidi Bel Abbès - Djillali Liabes | | Affiliation | Département d'Electronique | | Auteur | DOUDOU, Fatima Zohra | | Directeur de thèse | DJEBBARI Ali (Professeur) | | Filière | Electronique | | Diplôme | Doctorat | | Titre | Hybrid scheme based ACM (Automatic Censoring Multipaths) and antenna diversity for PN code acquisition | | Mots clés | Mots clés : DS-CDMA, PN-Acquisition , ACM, antenna diversity, Order statictics-CFAR | | Résumé | An adaptive hybrid acquisition system based on automatic censoring multipaths (ACM) and antenna diversity for DS CDMA in frequency selective Rayleigh fading channel is presented. The detector scheme is based on ordered statistics where the ACM algorithm capable to estimate the number of multipaths to be censored to evaluate the background level. This estimation is done using Monte Carlo simulation for a constant false censoring probability, and then enhanced by a theory developed for this purpose to validate the number of interferers estimated by the Monte Carlo simulations. The ACM algorithm does not require any prior knowledge about the number of multipaths. At this step, the total background level is evaluated with more accuracy, which allows a fast synchronization. Also, of logic function based ACM algorithm using parallel automatic censoring multipaths structure is integrated. | | Notes | ok | | Statut | Vérifié |
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