Performance Comparison of MMSE-SIC and MMSE-ML Multiuser Detectors in a STBC-OFDM System

Conference: PIMRC 2005 - 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications
09/11/2005 - 09/14/2005 at Berlin, Germany

Proceedings: PIMRC 2005

Pages: 5Language: englishTyp: PDF

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Tran, Xuan Nam; Le, Anh Tuan; Fujino, Tadashi (Department of Information and Communication Engineering, The University of Electro-Communications, Chofugaoka 1-5-1, Chofu-shi, Tokyo 182-8585, Japan)

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.