Low complexity semi-blind maximum-likelihood multiuser receiver for MC-CDMA systems

被引：4
作者：
Li, ZX [1 ]
Juntti, MJ [1 ]
Latva-Aho, M [1 ]
机构：
[1] Univ Oulu, Ctr Wireless Commun, FIN-90014 Oulu, Finland
来源：
2004 IEEE 15TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1-4, PROCEEDINGS | 2004年
关键词：
MC-CDMA; multiuser detector; sphere detection; GA based MUD; maximum-likelihood receiver;
D O I：
10.1109/PIMRC.2004.1368852
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
In this paper, we present a novel joint multiuser detection method based on sphere packing lattice decoding and semi-blind channel estimation for multicarrier code-division multiple-access (MC-CDMA) systems. After modelling MC-CDMA as a sphere packing lattice, a low-complexity maximum-likelihood (ML) detection, sphere decoding algorithm, is applied to jointly detect all users. The impacts of channel estimation errors are studied by incorporating a semi-blind subspace based channel estimation in the receiver. The selection of search radius and the complexity of the receiver are also investigated. Another promising detection technique, genetic algorithm (GA) based multiuser detector (MUD) is also studied. Simulation results demonstrate the superior performance of the semi-blind receiver compared to the conventional receivers for MC-CDMA and its robustness to channel estimation errors.
引用
收藏
页码：2910 / 2914
页数：5
相关论文
共 12 条
[1]   Genetically modified multiuser detection for code division multiple access systems [J].
Abedi, S ;
Tafazolli, R .
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, 2002, 20 (02) :463-473
[2]   Closest point search in lattices [J].
Agrell, E ;
Eriksson, T ;
Vardy, A ;
Zeger, K .
IEEE TRANSACTIONS ON INFORMATION THEORY, 2002, 48 (08) :2201-2214
[3]  
[Anonymous], SIGNAL PROCESSING AD
[4]   Lattice decoding for joint detection in direct-sequence CDMA systems [J].
Brunel, L ;
Boutros, JJ .
IEEE TRANSACTIONS ON INFORMATION THEORY, 2003, 49 (04) :1030-1037
[5]  
Brunel L, 2002, 2002 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-5, CONFERENCE PROCEEDINGS, P1526, DOI 10.1109/ICC.2002.997105
[6]  
Conway J. H., 1998, SPHERE PACKINGS LATT
[7]   Design and performance of multicarrier CDMA system in frequency-selective Rayleigh fading channels [J].
Hara, S ;
Prasad, R .
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 1999, 48 (05) :1584-1595
[8]   Achieving near-capacity on a multiple-antenna channel [J].
Hochwald, BM ;
ten Brink, S .
IEEE TRANSACTIONS ON COMMUNICATIONS, 2003, 51 (03) :389-399
[9]  
Juntti M. J., 1997, Proceeding. 1997 IEEE International Symposium on Information Theory (Cat. No.97CH36074), DOI 10.1109/ISIT.1997.613429
[10]   MMSE based receiver design for MC-CDMA systems [J].
Li, ZX ;
Latva-aho, M .
PIMRC 2003: 14TH IEEE 2003 INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS PROCEEDINGS, VOLS 1-3 2003, 2003, :2640-2644
12