Multiuser Diversity in Wireless Networks: A Diversity-Multiplexing Perspective

Kaushik Josiam, Dinesh Rajan
2007 2007 41st Annual Conference on Information Sciences and Systems  
We derive a simple characterization of the diversitymultiplexing (D-MG) tradeoff in three multiuser scenarios -multiple access, broadcast and relay assuming channel knowledge at the transmitters. Specifically, we study the D-MG tradeoff of protocols in literature that opportunistically use the channel knowledge to maximize the information rate. We show that for the multiple access channel with K users, a feedback of log K bits is sufficient to maximize the multiuser diversity gain. The
more » ... gain. The multiuser diversity gains in all three channels are obtained without explicit cooperation between users.
doi:10.1109/ciss.2007.4298340 dblp:conf/ciss/JosiamR07 fatcat:uupgqj4ljfghploemzy5cisl74