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Opportunistic feedback for downlink multiuser diversity

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2 Author(s)
Taiwen Tang ; Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA ; Heath, R.W.

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.

Published in:

Communications Letters, IEEE  (Volume:9 ,  Issue: 10 )

Date of Publication:

Oct. 2005

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