Feedback Gains for Gaussian Massive Multiple-Access Channels
Information Theory
2021-08-24 v2 math.IT
Abstract
Feedback is shown to increase the sum-rate capacity of K-user Gaussian multiple-access channels by at most a factor of approximately 1.54, improving Thomas' doubling bound (1987). The new bound is the best possible in the sense that it can be approached as closely as desired for a massive number of users. Moreover, feedback provides unbounded power gain in K for a fixed transmit power per user.
Cite
@article{arxiv.2105.03901,
title = {Feedback Gains for Gaussian Massive Multiple-Access Channels},
author = {Gerhard Kramer},
journal= {arXiv preprint arXiv:2105.03901},
year = {2021}
}
Comments
To be presented at the 2021 IEEE Information Theory Workshop