Computer Science – Information Theory
Scientific paper
2011-06-19
Computer Science
Information Theory
45 pages, 7 figures, submitted to IEEE Transaction on Information Theory
Scientific paper
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. In addition to arbitrary correlation among the source signals at the users, both the relay and the destination are assumed to have side information correlated with the source signals. Sufficient conditions for reliable communication based on operational separation, as well as necessary conditions on the achievable source-channel rates are characterized. Since operational separation is generally not optimal for MARCs and MABRCs, sufficient conditions for reliable communication using joint source-channel coding schemes based on a combination of the correlation preserving mapping technique with binning are also derived. For correlated sources transmitted over fading Gaussian MARCs and MABRCs, conditions under which informational separation is optimal are found.
Dabora Ron
Gunduz Deniz
Murin Yonathan
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