1. Multi-user detection in ds-cdma systems: a conjugate-gradient implementation
- Author
-
Mahmoud Ammar, A. Al Housseini, Samir Saoudi, Thierry Chonavel, Département Signal et Communications (SC), Institut Mines-Télécom [Paris] (IMT)-Télécom Bretagne-Université européenne de Bretagne - European University of Brittany (UEB), Télécom Bretagne, Bibliothèque, and Université européenne de Bretagne - European University of Brittany (UEB)-Télécom Bretagne-Institut Mines-Télécom [Paris] (IMT)
- Subjects
Mobile radio ,Computer science ,Radio receiver ,050801 communication & media studies ,02 engineering and technology ,Data_CODINGANDINFORMATIONTHEORY ,law.invention ,symbols.namesake ,0508 media and communications ,law ,Sliding window protocol ,Conjugate gradient method ,0202 electrical engineering, electronic engineering, information engineering ,Electronic engineering ,Computer Science::Networking and Internet Architecture ,Fading ,Rayleigh scattering ,[SPI.SIGNAL] Engineering Sciences [physics]/Signal and Image processing ,Computer Science::Information Theory ,Code division multiple access ,05 social sciences ,Detector ,ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS ,020206 networking & telecommunications ,Multiuser detection ,Spread spectrum ,symbols ,[SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing - Abstract
International audience; This paper deals with direct-sequence code division multiple access (DS-CDMA) transmissions over mobile radio channels. An iterative conjugate gradient (CG) implementation of the decorrelator detector is studied in the case of asynchronous transmissions over multipath channels. This implementation is based on a sliding window technique. Simulation results are presented for flat fading Rayleigh multipath channels, showing that the proposed detector is resistant to the near-far effect and that low performance loss is obtained, compared to the single-user bound.
- Published
- 2003