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Interference Channels With Source Cooperation

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2 Author(s)
Vinod M. Prabhakaran ; Coordinated Science Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, USA ; Pramod Viswanath

In this paper, the role of cooperation in managing interference-a fundamental feature of the wireless channel-is investigated by studying the two-user Gaussian interference channel where the source nodes can both transmit and receive in full duplex. The sum capacity of this channel is obtained within a gap of a constant number of bits. The coding scheme used builds up on the superposition scheme of Han and Kobayashi for the two-user interference channel without cooperation. New upperbounds on the sum capacity are also derived. The same coding scheme is shown to obtain the sum capacity of the symmetric two-user Gaussian interference channel with noiseless feedback within a constant gap.

Published in:

IEEE Transactions on Information Theory  (Volume:57 ,  Issue: 1 )