Title :
Performance comparison of MMSE-SIC and MMSE-ML multiuser detectors in a STBC-OFDM system
Author :
Tran, X.N. ; Le, Anh Tuan ; Fujino, Tadashi
Author_Institution :
Dept. of Inf. & Commun. Eng., Univ. of Electro-Commun., Tokyo
Abstract :
In this paper, we propose two minimum mean square error (MMSE)-based multiuser detectors, called the combined MMSE and maximum likelihood (MMSE-ML) multiuser detector and the combined MMSE and successive interference cancellation (MMSE-SIC) multiuser detector, for an uplink space-time block coded orthogonal frequency division multiplexing (STBC-OFDM) system. Both detectors provide significantly improved bit error rate (BER) over the conventional MMSE multiuser detector while requiring the same complexity order. Moreover, the combined MMSE-ML detector exhibits better BER than the combined MMSE-SIC, particularly, in a system with a small number of users
Keywords :
OFDM modulation; block codes; error statistics; interference suppression; least mean squares methods; maximum likelihood detection; multiuser detection; space-time codes; BER; MMSE-ML; MMSE-SIC multiuser detector; STBC-OFDM system; bit error rate; maximum likelihood multiuser detector; minimum mean square error; orthogonal frequency division multiplexing; space-time block codes; successive interference cancellation; Bit error rate; Computational complexity; Detectors; Interference cancellation; Maximum likelihood detection; Mean square error methods; Multiuser detection; OFDM; Radiofrequency interference; Receiving antennas;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2005. PIMRC 2005. IEEE 16th International Symposium on
Conference_Location :
Berlin
Print_ISBN :
9.7838007291e+012
DOI :
10.1109/PIMRC.2005.1651601
