Journal
IEEE TRANSACTIONS ON INFORMATION THEORY
Volume 66, Issue 5, Pages 2860-2871Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIT.2019.2957808
Keywords
Capacity; Gaussian multiple-access channel (GMAC); feedback; factorization of convex envelope
Funding
- Swiss National Science Foundation [169294, P2ELP2_165137]
- Alexander von Humboldt Professorship
- Deutsche Forschungsgemeinschaft (DFG) [KR 3517/9-1]
- Swiss National Science Foundation (SNF) [P2ELP2_165137] Funding Source: Swiss National Science Foundation (SNF)
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The feedback sum-rate capacity is established for the symmetric $J$ -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).
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