MMSE Space-Time Multi-User Detection in OFDM Systems Based on a Variety of Modulation

Abstract:

MIMO-OFDM is considered as candidates for future 3G/B3G broadband wireless services. High quality mobile services have to eliminate multiple-access interference (MAI) that affects multi-user receiver performance in MIMO-OFDM system. In this paper, we analyze the effect of MAI on MIMO-OFDM system and adapt a successive interference cancellation (SIC) multi-user detection algorithm which based on minimum mean square error (MMSE) algorithm for MIMO-OFDM system. This algorithm by optimizing the sorting structure enables the receiver algorithm has better performance. The simulation results show that the algorithm can obtain rate is better than the conventional linear MMSE algorithm performance in the error, and constellation mapping point spacing also affect the detection performance. As the spacing is reducing, the bit error probability will rise.

• Periodical: Applied Mechanics and Materials (Volumes 401-403)
• Pages: 1908-1911
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.401-403.1908
• Online since: September 2013
• Authors: Meng Qi, Xin Xin Wang
• Keywords: MIMO-OFDM, Multiuser Detection, Silicon Carbide (SiC), Space-Time Coding

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