On the Capacity Region of the 3-user Gaussian Interference Channel with Strong Interference

Konferenz: European Wireless 2014 - 20th European Wireless Conference
14.05.2014 - 16.05.2014 in Barcelona, Spain

Tagungsband: European Wireless 2014

Seiten: 6Sprache: EnglischTyp: PDF

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Chaaban, Anas (Institute of Digital Communication Systems, Ruhr-University of Bochum, 44780 Bochum, Germany)

The symmetric 3-user interference channel is studied with the goal of characterizing its capacity region in the strong interference regime within a constant gap. To this end, a transmission scheme combining rate-splitting and interference alignment is proposed, and its achievable rate is derived. Next it is shown that the proposed scheme achieves the so-called greedy-max corner points of the capacity region within a constant gap. By combining this result with previous results on the sumcapacity of the interference channel, a constant gap characterization of the capacity region for the strong interference regime is obtained.