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Multiuser multiple-input–multiple-output (MIMO) has great potential to substantially improve throughput of wireless networks. Unfortunately, it requires a significant amount of feed back for user selection, which prevents practical implementation. The authors propose a feed back reduced downlink multiuser MIMO system, where a signal-to-interference-plus-noise ratio (SINR) threshold is carefully designed...
We propose a feedback strategy based on SINR threshold for downlink multiuser wireless systems. By using the proposed strategy the base station receives feedback only from those users whose SINRs are above a threshold which is elaborately chosen and broadcast to all users in the cell by the base station. So not all users need send their channel direction information (CDI) and channel quality information...
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