Multiuser Scheduling over MIMO Nakagami-m Fading Channels: Capacity and BER Performance

A performance analysis for the average channel capacity and average bit error rate (BER) of user scheduling schemes for multiuser MIMO systems exploiting the multiuser and antenna diversities over non-identically distributed Nakagami-m, fading channels is presented. We consider different scheduling schemes including absolute SNR-based scheduling and normalized SNR-based scheduling schemes for both heterogeneous and homogeneous wireless networks. We derive expressions for the probability density function (PDF) and cumulative distribution function (CDF) of the signal-to-noise-ratio (SNR) in non-identical Nakagami-m MIMO channels for each scheduling scheme. These expressions are used to obtain analytical expressions for the average channel capacity and average bit error rate (BER) of the system under study. Finally, the performances of different schemes are evaluated and compared.