Application de la logique floue aux techniques d'accès multiples par répartition des codes CDMA

摘要: Code Division Multiple Access is a spread spectrum technique used in multiple access systems. It spreads any binary signal over wide bandwidth before sending it. If one receiver try to despreads the signal, it must use same code applied by send er. The codes CDMA are made chift registers. However, these registers have many disadvantages : who knows number of regis ters and their inside connexions can easily produce sequence jam other's conversations. In papers we give you new pattern based on fuzzy logic theory with some rules initial conditions.