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In this paper, the authors investigate the study of techniques for scheduling users for resource allocation in the case of Multiple Input and Multiple Output (MIMO) packet transmission systems. In these systems, transmit antennas are assigned to one user or dynamically to different users using spatial multiplexing. The allocation of all transmit antennas to one user cannot take full advantages of multi-user diversity. Therefore, they developed the case when resources are allocated dynamically. At each time slot users have to feed back their channel information on an uplink feedback channel. Channel information considered available in the schedulers is the Zero Forcing (ZF) post detection signal to interference plus noise ratio. The analysis study concerns the round robin and the opportunistic schemes.
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