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This paper appeared in the proceedings for ISIT 2006.

Abstract

In this paper, the multiple access channel (MAC) with channel state is analyzed in a scenario where a) the channel state is known non-causally to the transmitters and b) there is perfect causal feedback from the receiver to the transmitters. An achievable region and an outer bound are found for a discrete memoryless MAC that extend existing results, bringing together ideas from the two separate domains of MAC with state and MAC with feedback. Although this achievable region does not match the outer bound in general, non-trivial conditions are found where they meet. In the case of a Gaussian MAC, a specialized achievable region is found by using a combination of dirty paper coding and a generalization of the Schalkwijk-Kailath Ozarow and Merhav-Weissman schemes, and this region is found to be capacity achieving. Specifically, it is shown that additive Gaussian interference that is known non-causally to the transmitter causes no loss in capacity for the Gaussian MAC with feedback.

Citation

Wei Wu, Sriram Vishwanath, and Ari Arapostathis . "Capacity Results for Multiple Access Channels with State and Feedback." Proceedings of 2006 International Symposium on Information Theory.

BibTeX

@inproceedings{ {{{bitex cite}}},
  author = "Wei Wu and Sriram Vishwanath and Ari Arapostathis",
  title = { Capacity Results for Multiple Access Channels with State and Feedback },
  booktitle = { Proceedings of 2006 International Symposium on Information Theory }
}