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Évaluation des performances des communications optiques sans fil

Évaluation des performances des communications optiques sans fil

          
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About the Book

Dans ce travail, la performance d'un système OWC a été évaluée à l'aide de MATLAB. Le BER et l'étalement du délai ont été considérés comme des mesures de performance. Il a été constaté dans la littérature que le système OWC peut fournir un débit de données de quelques tera bit par seconde, mais il ne peut couvrir que quelques mètres, c'est-à-dire que la portée est courte. De plus, les faisceaux lumineux sont absorbés par les murs et le plafond. Nous avons donc amélioré la performance BER du système en proposant un émetteur multi-faisceaux où le faisceau et l'angle de chaque faisceau sont adaptés en fonction de l'information sur l'état du canal. Ici, nous avons proposé une nouvelle méthode d'adaptation du faisceau et de l'angle en temps réel pour le système OWC en utilisant ANFIS. Ce contrôleur NF a cinq couches et est formé avec l'algorithme de décentrement de gradient de rétropropagation. Le contrôleur est formé avec des données obtenues par des simulations. Les résultats des simulations montrent que le système de communication par diffusion de faisceaux ponctuels OW basé sur NF proposé surpasse les autres méthodes de diffusion de faisceaux ponctuels en termes de SNIR et d'étalement du délai. Le modèle ANFIS distribue l'allocation de puissance en calculant l'étalement du délai en considérant l'effet du décalage Doppler des dispositifs mobiles.


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Product Details
  • ISBN-13: 9786205755174
  • Publisher: KS Omniscriptum Publishing
  • Publisher Imprint: Editions Notre Savoir
  • Height: 229 mm
  • No of Pages: 56
  • Spine Width: 3 mm
  • Width: 152 mm
  • ISBN-10: 6205755173
  • Publisher Date: 28 Feb 2023
  • Binding: Paperback
  • Language: French
  • Returnable: N
  • Weight: 95 gr


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