METHOD AND ARRANGEMENT IN WIRELESS COMMUNICATION NETWORKS USING RELAYING

摘要

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.