Procede et dispositif utilises dans des reseaux de communication sans fil a relais

Method and arrangement in wireless communication networks using relaying

Abstract

The present invention relates to wireless communication systems wherein cooperative relaying is used to enhance performance. According to the method and arrangement of the invention artificial frequency selectivity and spatial diversity is provided by introducing distributed delay diversity among relay stations. Distributed delay diversity is achieved by that the relaying nodes in their forwarding between the access point and the user equipment applies dissimilar cyclic shifts to their respective forwarded OFDM symbols.
La présente invention concerne des systèmes de communication sans fil dans lesquels sont utilisés des relais pour améliorer leur efficacité. Le procédé et le dispositif de l'invention permettent d'obtenir une sélectivité de fréquence et une diversité spatiale artificielles par introduction d'une diversité de retard distribuée parmi les stations relais. La diversité de retard distribuée est obtenue grâce à l'application, par les noeuds de relais dans leur transmission entre le point d'accès et l'équipement utilisateur, de décalages cycliques sur les symboles OFDM transmis correspondants.

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Patent Citations (1)

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NO-Patent Citations (4)

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