Modelling, Simulation of Multi-User Diversity with Channel State Information in MIMO Systems

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Provided by: International Journal of Computer Networks and Wireless Communications (IJCNWC)
Topic: Mobility
Format: PDF
In a Multiple Input and Multiple Output (MIMO) transmit antenna system, single antenna per receiver downlink channel with limited Channel State Information (CSI), the authors investigate the following: for given a constraint on the overall system-wide feedback load, is it desirable to get low rate channel feedback from a large number of receivers or high-rate/high quality feedback from a smaller number of receivers. Achieving feedback from many receivers allows multiuser diversity to be exploited, while high-rate feedback concedes for very appropriate selection of beam forming directions.
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