On the Capacity of Interference Channels with One Cooperating Transmitter

Details On the Capacity of Interference Channels with One Cooperating Transmitter On the Capacity of Interference Channels with One Cooperating Transmitter

2007-10-17

arxiv.org/abs/0710.3375v3

Computer Science

Information Theory

11 pages, 8 figures, 1 table

Scientific paper

Inner and outer bounds are established on the capacity region of two-sender, two-receiver interference channels where one transmitter knows both messages. The transmitter with extra knowledge is referred to as being cognitive. The inner bound is based on strategies that generalize prior work, and include rate-splitting, Gel'fand-Pinsker coding and cooperative transmission. A general outer bound is based on the Nair-El Gamal outer bound for broadcast channels. A simpler bound is presented for the case in which one of the decoders can decode both messages. The bounds are evaluated and compared for Gaussian channels.

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