4 research outputs found
Sum-Rate Capacity for Symmetric Gaussian Multiple Access Channels with Feedback
The feedback sum-rate capacity is established for the symmetric -user
Gaussian multiple-access channel (GMAC). The main contribution is a converse
bound that combines the dependence-balance argument of Hekstra and Willems
(1989) with a variant of the factorization of a convex envelope of Geng and
Nair (2014). The converse bound matches the achievable sum-rate of the
Fourier-Modulated Estimate Correction strategy of Kramer (2002).Comment: 16 pages, 2 figures, published in International Symposium on
Information Theory (ISIT) 201