Performance of multiuser diversity in MIMO systems on arbitrary Nakagami-m fading channels
Wireless Communications & Mobile Computing
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In this paper, we present a comprehensive performance analysis for multiple-input multiple-output (MIMO) systems with multiuser diversity over Rayleigh fading channels. We derive exact closed-form expressions of the outage probability and the average bit error rate (BER) for different MIMO schemes, including the selective combining (SC), maximum ratio combining (MRC) and space-time block codes (STBC). We also provide the explicit upper bounds on the BER performance. Finally, the mathematical formalism is verified by numeric results that study the interaction between the antenna diversity and the multiuser diversity. It is observed that the system performance is deteriorated as the number of transmit antennas increases in multiuser scenario, which is unlike the case in single-user systems. Copyright © 2007 John Wiley & Sons, Ltd.