Capacity Results for Two Classes of Three-Way Channels
Abstract
This paper considers the three-way channel, consisting of three nodes, where each node broadcasts a message to the two other nodes. The capacity of the finite-field three-way channel is derived, and is shown to be achievable using a non-cooperative scheme without feedback. The same scheme is also shown to achieve the equal-rate capacity (when all nodes transmit at the same rate) of the sender-symmetrical (each node receives the same SNR from the other two nodes) phase-fading AWGN channel. In the light that the non-cooperative scheme is not optimal in general, a cooperative feedback scheme that utilizes relaying and network coding is proposed and is shown to achieve the equal-rate capacity of the reciprocal (each pair of nodes has the same forward and backward SNR) phase-fading AWGN three-way channel.
Keywords
Cite
@article{arxiv.1208.0063,
title = {Capacity Results for Two Classes of Three-Way Channels},
author = {Lawrence Ong},
journal= {arXiv preprint arXiv:1208.0063},
year = {2013}
}
Comments
Author's final version (accepted for presentation at IEEE 12th International Symposium on Communications and Information Technologies [ISCIT 2012])