Opportunistic feedback for downlink multiuser diversity. Tang, T. & Heath Jr., R. IEEE Communications Letters, 2005. abstract bibtex This paper proposes a random access based feedback protocol for achieving multiuser diversity with a fixed number of feedback slots. Active users send a feedback message with some probability if their channel power is above a threshold. The threshold and random access probability are jointly designed to maximize the average sum rate of all users. ? 2005 IEEE.
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author = {Tang, T. and Heath Jr., R.W.},
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