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The authors consider a two-user state-dependent multi-access 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. They derive inner and outer bounds on the capacity region of this model in the discrete memoryless case as well as the Gaussian case. Further, they show that the bounds for the Gaussian case are tight in some special cases.
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