摘要: An opportunistic feedback protocol with multiple thresholds and access probabilities is proposed for multiuser diversity in multiple-input-multiple-output (MIMO) broadcast channels. Users compete to report the channel state information (CSI) via contention-based channels if their scheduling metric exceeds a threshold. The users are divided into two classes according metric. For each class, have different random chances minislots. performance of evaluated MIMO system zero-forcing (ZF) receivers terms sum-rate capacity, load, fairness. simulation results show that significantly reduces load without sacrificing capacity too much. can be operated existing algorithms modification.
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