Title :
AN EFFICIENT MULTI-USER DETECTION SCHEME FOR OVERLOADED GROUP-ORTHOGONAL MC-CDMA SYSTEMS
Author :
Wang, Ping ; Le-Ngoc, Tho
Author_Institution :
Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, Que.
Abstract :
This paper presents an efficient multi-user detection (MUD) scheme for overloaded MC-CDMA systems. The proposed detection scheme for overloaded system achieves the optimal performance for constant-modulus modulation, e.g., MPSK, and provides near-optimal performance for non-constant-modulus modulation, e.g., M-QAM. Moreover, it has lower complexity than other optimal detection algorithms, especially suitable for group-orthogonal MC-CDMA (GO-MC-CDMA) systems, where group-based technique keeps joint detection size relatively small
Keywords :
code division multiple access; modulation; constant-modulus modulation; multiuser detection; nonconstant-modulus modulation; overloaded group-orthogonal MC-CDMA system; Bandwidth; Cost function; Detection algorithms; Interference; Lattices; Multicarrier code division multiple access; Multiuser detection; OFDM modulation; Performance gain; Performance loss;
Conference_Titel :
Wireless Pervasive Computing, 2007. ISWPC '07. 2nd International Symposium on
Conference_Location :
San Juan
Print_ISBN :
1-4244-0523-8
Electronic_ISBN :
1-4244-0523-8
DOI :
10.1109/ISWPC.2007.342615
