Title :
Multiuser detection for QO-STBC MC-CDMA MIMO systems
Author :
Yu, Jung-Lang ; Wu, Chun-Hsien
Author_Institution :
Dept. of Electr. Eng., Fu Jen Catholic Univ., Taipei, Taiwan
Abstract :
The multi-carrier code-division multiple-access (MC-CDMA) multiple-input multiple-output (MIMO) system with quasi-orthogonal space-time block codes (QO-STBC) is studied in this paper. Considering QO-STBC scheme that involves three or four transmit antennas, a subspace-based blind channel estimation is proposed. With the estimated channel coefficients, the minimum output energy (MOE) and eigenspace receivers are employed for symbol detection. The weight analyses are performed to reduce the system computational complexity. Besides, the forward backward averaging technique is presented to enhance the performance of multiuser detection.
Keywords :
MIMO communication; blind source separation; block codes; channel estimation; code division multiple access; communication complexity; eigenvalues and eigenfunctions; multiuser detection; orthogonal codes; radio receivers; space-time codes; transmitting antennas; MC-CDMA system; MIMO system; QO-STBC system; computational complexity; eigenspace receiver; forward backward averaging technique; minimum output energy; multicarrier code-division multiple-access; multiple-input multiple-output system; multiuser detection; quasiorthogonal space-time block codes; subspace-based blind channel estimation; symbol detection; transmit antenna; Blind equalizers; Computational complexity; MIMO; Multiaccess communication; Multicarrier code division multiple access; Multiuser detection; Performance analysis; Receiving antennas; Transmitters; Transmitting antennas; MC-CDMA; MIMO; MOE; Multiuser Detection; QO-STBC;
Conference_Titel :
Communications and Networking in China, 2009. ChinaCOM 2009. Fourth International Conference on
Conference_Location :
Xian
Print_ISBN :
978-1-4244-4337-6
Electronic_ISBN :
978-1-4244-4337-6
DOI :
10.1109/CHINACOM.2009.5339928
