Multiaccess channels with state known to one encoder: another case of degraded message sets

Authors:
Abdellatif Zaidi;Shiva Prasad Kotagiri;J. Nicholas Laneman;Luc Vandendorpe
Affiliations:
École Polytechnique de Louvain, Université catholique de Louvain, Belgium;SERDES Technology Group, Xilinx Inc., San Jose, CA;Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN;École Polytechnique de Louvain, Université catholique de Louvain, Belgium
Venue:
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 4
Year:
2009

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Abstract

We consider a two-user state-dependent multiaccess channel in which only one of the encoders is informed, non-causally, of the channel states. Two independent messages are transmitted: a common message transmitted by both the informed and uninformed encoders, and an individual message transmitted by only the uninformed encoder. We derive inner and outer bounds on the capacity region of this model in the discrete memoryless case as well as the Gaussian case. Further, we show that the bounds for the Gaussian case are tight in some special cases.