Title :
An Enhanced MAP-DFE Multiuser Detection Technique for Uplink MC-CDMA Systems
Author_Institution :
France Telecom R&D Div., RESA-MNA, Issy-les-Moulineaux
Abstract :
In this paper, we apply the MAP-DFE technique onto multiuser detection of the MC-CDMA uplink receiver. To improve the MAP-DFE performance, we propose two enhancement techniques: the IQ (in phase and quadrature) processing and the a posteriori error probability precision optimization by taking into account the influences of the nulling matrix, the end to end matrix and the MAI contribution. We have obtained significant performance improvement. We have also compared the performance of the enhanced MAP-DFE with the sphere decoder
Keywords :
code division multiple access; decision feedback equalisers; decoding; error statistics; interference (signal); matrix algebra; maximum likelihood detection; multiuser detection; MAI contribution; MC-CDMA uplink receiver; a posteriori error probability precision optimization; end-to-end matrix; enhanced MAP-DFE multiuser detection technique; inphase processing; nulling matrix; quadrature processing; sphere decoder; uplink MC-CDMA systems; AWGN; Frequency estimation; Iterative decoding; Land mobile radio; Maximum likelihood decoding; Mobile communication; Multicarrier code division multiple access; Multiple access interference; Multiuser detection; OFDM;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
1-4244-0329-4
Electronic_ISBN :
1-4244-0330-8
DOI :
10.1109/PIMRC.2006.254417
