Multiple antennas can be used for increasing the amount of diversity or the number of degrees of freedom in wireless communication systems, but there is a fundamental tradeoff between how much of each any coding scheme can get.Expand

Multiuser diversity is a form of diversity inherent in a wireless network, provided by independent time-varying channels across the different users.Expand

We show that the existing outer bounds can be arbitrarily loose in some parameter ranges, and by deriving new outer bounds, we show that a very simple and explicit Han-Kobayashi type scheme can achieve to within a single bit per second per hertz (bit/s/Hz) of the capacity for all values of the channel parameters.Expand

We study the capacity of multiple-antenna fading channels. We focus on the scenario where the fading coefficients vary quickly; thus an accurate estimation of the coefficients is generally notâ€¦ Expand

In a wireless network with a single source and a single destination and an arbitrary number of relay nodes, what is the maximum rate of information flow achievable? We make progress on this longâ€¦ Expand

We show that in a large system with each user using random spreading sequences, the limiting interference effects under several linear multiuser receivers can be decoupled, such that each interferer can be ascribed a level of effective interference that it provides to the user to be demodulated.Expand