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Annales Des Télécommunications

, Volume 58, Issue 11–12, pp 1873–1897 | Cite as

Direct-sequence code division multiple access: From radio communications to optical networks

  • Mounia Lourdiane
  • Philippe Gallion
  • Robert Vallet
Article

Abstract

A direct sequence optical code division multiple access technique is investigated. This paper introduces, first, the principles definitions of Code Division Multiple Access in radio communications. After that, the performances of Optical Code Division Multiple Access are evaluated in association with a realistic amplified optical channel model.

To determine the performances obtained by this combination, different detection methods are investigated in an OpticalCDMA system. Threshold and multi-user detections are developed in association with Optical Orthogonal Codes:ooc and Prime Sequences:ps, specially designed to be adapted to fiber optic channel.

Key words

Code division multiple access Radiocommunication Direct sequence spread spectrum Optical telecommunication Optical fiber transmission Gaussian channel Amplification Coding Background noise Signal detection Error rate 

Accès multiple par répartition de codes à séquences directes: des communications radiofréquences aux réseaux optiques

Résumé

Dans cet article, une étude des techniques d’accès multiple par répartition de code (CDMA) à séquences directes est réalisée. En premier lieu, les principales définitions duCDMA utilisé dans les systèmes de radio communications sont données. Par la suite, les performances duCDMA optique sont évaluées en y associant un modèle réaliste de canal optique amplifié.

Afin de déterminer les performances obtenues par ce modèle, différentes méthodes de détection ont été mises en œuvre dans le systèmeCDMA optique, citons comme exemple le détecteur à seuil et le détecteur multi-utilisateur. De plus des codes spécifiques auCDMA optique sont évalués et associés à notre modèle de canal, parmi lesquelles les code optiques orthogonaux (ooc) et les séquences premières (ps).

Mots clés

Accès multiple code Spectre séquence directe Télécommunication optique Transmission fibre optique Canal gaussien Amplification Codage Bruit fond Détection signal Taux erreur 

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Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  • Mounia Lourdiane
    • 1
  • Philippe Gallion
    • 1
  • Robert Vallet
    • 1
  1. 1.Dpt comelec, UMR 5141 du CNRSGET/Télécom ParisParis Cedex 13

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