On the Capacity of Interference Channels with Degraded Message sets

Details On the Capacity of Interference Channels with Degraded Message sets On the Capacity of Interference Channels with Degraded Message sets

2006-05-17

arxiv.org/abs/cs/0605071v1

Computer Science

Information Theory

Scientific paper

This paper is motivated by a sensor network on a correlated field where nearby sensors share information, and can thus assist rather than interfere with one another. A special class of two-user Gaussian interference channels (IFCs) is considered where one of the two transmitters knows both the messages to be conveyed to the two receivers (called the IFC with degraded message sets). Both achievability and converse arguments are provided for this scenario for a class of discrete memoryless channels with weak interference. For the case of the Gaussian weak interference channel with degraded message sets, optimality of Gaussian inputs is also shown, resulting in the capacity region of this channel.

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