Multi-Way Relay Networks: Orthogonal Uplink, Source-Channel Separation and Code Design
Abstract
We consider a multi-way relay network with an orthogonal uplink and correlated sources, and we characterise reliable communication (in the usual Shannon sense) with a single-letter expression. The characterisation is obtained using a joint source-channel random-coding argument, which is based on a combination of Wyner et al.'s "Cascaded Slepian-Wolf Source Coding" and Tuncel's "Slepian-Wolf Coding over Broadcast Channels". We prove a separation theorem for the special case of two nodes; that is, we show that a modular code architecture with separate source and channel coding functions is (asymptotically) optimal. Finally, we propose a practical coding scheme based on low-density parity-check codes, and we analyse its performance using multi-edge density evolution.
Cite
@article{arxiv.1210.0271,
title = {Multi-Way Relay Networks: Orthogonal Uplink, Source-Channel Separation and Code Design},
author = {Roy Timo and Gottfried Lechner and Lawrence Ong and Sarah J. Johnson},
journal= {arXiv preprint arXiv:1210.0271},
year = {2013}
}
Comments
Authors' final version (accepted and to appear in IEEE Transactions on Communications)