On the Capacity of the 2-user Gaussian MAC Interfering with a P2P Link

Conference: European Wireless 2011 - Sustainable Wireless Technologies
04/27/2011 - 04/29/2011 at Vienna, Austria

Proceedings: European Wireless 2011

Pages: 6Language: englishTyp: PDF

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Chaaban, Anas; Sezgin, Aydin (Emmy-Noether Research Group on Wireless Networks, Institute of Telecommunications and Applied Information Theory, Ulm University, 89081 Ulm, Germany)

A multiple access channel and a point-to-point channel sharing the same medium for communications are considered. We obtain an outer bound for the capacity region of this setup, and we show that this outer bound is achievable in some cases. These cases are mainly when interference is strong or very strong. In the low interference regime, a simple strategy using Gaussian codes and treating interference as noise is considered. An upper bound on the sum capacity is derived and shown to be tight (but not coinciding) with the sum-rate achievable using this scheme.