Multiple Access Channels.

TL;DR: This information-theoretic survey provides guidelines for the spectral efficiency gains possible through cognitive radios, as well as practical design ideas to mitigate the coexistence challenges in today's crowded spectrum.

TL;DR: The question whether a set of desired connections can be accommodated in a network to the problem of finding a point on a variety defined over a suitable field lends itself to the derivation of a number of theorems concerning the feasibility of a communication scenario involving failures.

TL;DR: This work focuses on the multiaccess fading channel with Gaussian noise, and defines two notions of capacity depending on whether the traffic is delay-sensitive or not, and characterize the throughput capacity region which contains the long-term achievable rates through the time-varying channel.

TL;DR: An efficient numerical algorithm to compute the optimal input distribution that maximizes the sum capacity of a Gaussian multiple-access channel with vector inputs and a vector output is proposed.