Joint Source-Channel Coding for the Multiple-Access Relay Channel

TL;DR

This paper develops joint source-channel coding schemes for reliable transmission over multiple-access relay channels with correlated sources and side information, combining correlation preserving mapping and Slepian-Wolf coding techniques.

Contribution

It introduces two novel coding schemes that integrate CPM and SW coding for MARCs and MABRCs, expanding the theoretical understanding of source-channel coding in relay networks.

Findings

Derived sufficient conditions for reliable communication.

Proposed two coding schemes combining CPM and SW techniques.

Enhanced understanding of source correlation handling in relay channels.

Abstract

Reliable transmission of arbitrarily correlated sources over multiple-access relay channels (MARCs) and multiple-access broadcast relay channels (MABRCs) is considered. In MARCs, only the destination is interested in a reconstruction of the sources, while in MABRCs, both the relay and the destination want to reconstruct the sources. We allow an arbitrary correlation among the sources at the transmitters, and let both the relay and the destination have side information that are correlated with the sources. Two joint source-channel coding schemes are presented and the corresponding sets of sufficient conditions for reliable communication are derived. The proposed schemes use a combination of the correlation preserving mapping (CPM) technique with Slepian-Wolf (SW) source coding: the first scheme uses CPM for encoding information to the relay and SW source coding for encoding information to the destination; while the second scheme uses SW source coding for encoding information to the relay and CPM for encoding information to the destination.