Allocation of Optimum Sequences Based on Channel Conditions in DS-CDMA
Konferenz: European Wireless 2011 - Sustainable Wireless Technologies
27.04.2011 - 29.04.2011 in Vienna, Austria
Tagungsband: European Wireless 2011
Seiten: 4Sprache: EnglischTyp: PDFPersönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt
Ambekar, Abhijit K.; Schotten, Hans D. (Chair for Wireless Communications and Navigation, University of Kaiserslautern, Kaiserslautern, Germany)
We consider the problem of allocating optimum sequences to users based on their channel conditions in a single-cell synchronous DS-CDMA system. We consider two cases. In the first case we allocate Walsh-Hadamard sequences to users when the number of users is less than or equal to the processing gain. In the second case we allocate Gold sequences to users when the number of users is greater than the processing gain. In both the cases we investigate the gain achieved by allocating sequences to users based on their channel conditions. We also investigate the effects of imperfect channel estimation on the performance of the system.