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A real-time traffic scheduling algorithm is proposed for the downlink of multi-cell and multi-user MIMO-OFDMA systems. This proposed scheduling algorithm takes the spatial and frequency characters of users into account, and transmission antenna selection and modified water-filling power allocation algorithms are adopted in the allocation of space-frequency subchannels. Simulation results show that this algorithm can not only obtain better system throughput, but also lower outage rate of real-time traffic and guarantee the fairness among users.
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