DocumentCode :
2169988
Title :
Multiuser detection for MC-CDMA system with M-QAM using semidefinite programming relaxation
Author :
Wang, X.M. ; Mao, Zhiwei
Author_Institution :
Dept. of Electr. Eng., Lakehead Univ., Thunder Bay, Ont., Canada
fYear :
2005
fDate :
24-26 Aug. 2005
Firstpage :
530
Lastpage :
533
Abstract :
A multiuser detector based on semidefinite programming (SDP) is proposed for multicarrier code-division multiple-access (MC-CDMA) systems with M-ary quadrature amplitude modulation (M-QAM). It is shown that maximum likelihood (ML) detection can be carried out by ´relaxing´ the associated integer programming problem to a SDP problem, which leads to a detector of much reduced complexity. Computer simulations demonstrate that the proposed detector offers a symbol-error rate (SER) performance which outperforms existing suboptimal detectors, and the computational complexity of the proposed detector is considerably reduced compared with that of ML detector.
Keywords :
code division multiple access; computational complexity; integer programming; maximum likelihood detection; multiuser detection; quadrature amplitude modulation; M-QAM; M-ary quadrature amplitude modulation; MC-CDMA system; computational complexity; computer simulations; integer programming problem; maximum likelihood detection; multicarrier code-division multiple-access; multiuser detection; semidefinite programming relaxation; symbol-error rate performance; Computational complexity; Computer simulation; Detectors; Linear programming; Maximum likelihood detection; Multiaccess communication; Multicarrier code division multiple access; Multiuser detection; Quadratic programming; Quadrature amplitude modulation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications, Computers and signal Processing, 2005. PACRIM. 2005 IEEE Pacific Rim Conference on
Print_ISBN :
0-7803-9195-0
Type :
conf
DOI :
10.1109/PACRIM.2005.1517343
Filename :
1517343
Link To Document :
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