Distributed Joint Source-Channel Coding on a Multiple Access Channel with Side Information

TL;DR

This paper investigates the joint source-channel coding problem for multiple access channels with side information, providing new sufficient conditions, coding schemes, and extensions to channels with feedback and fading.

Contribution

It introduces new theoretical conditions and practical coding schemes for transmitting correlated sources over MACs with side information, including channels with feedback and fading.

Findings

Derived sufficient conditions for source transmission with distortion

Proposed effective joint source-channel coding schemes

Extended results to channels with feedback and fading

Abstract

We consider the problem of transmission of several distributed sources over a multiple access channel (MAC) with side information at the sources and the decoder. Source-channel separation does not hold for this channel. Sufficient conditions are provided for transmission of sources with a given distortion. The source and/or the channel could have continuous alphabets (thus Gaussian sources and Gaussian MACs are special cases). Various previous results are obtained as special cases. We also provide several good joint source-channel coding schemes for a discrete/continuous source and discrete/continuous alphabet channel. Channels with feedback and fading are also considered. Keywords: Multiple access channel, side information, lossy joint source-channel coding, channels with feedback, fading channels.