Sum-Capacity of Ergodic Fading Interference and Compound Multiaccess Channels

Details Sum-Capacity of Ergodic Fading Interference and Compound Multiaccess Channels Sum-Capacity of Ergodic Fading Interference and Compound Multiaccess Channels

2008-04-30

arxiv.org/abs/0804.4866v1

Computer Science

Information Theory

Proceedings of the 2008 IEEE International Symposium on Information Theory, Toronto, ON, Canada, July 6 - 11, 2008

Scientific paper

The problem of resource allocation is studied for two-sender two-receiver fading Gaussian interference channels (IFCs) and compound multiaccess channels (C-MACs). The senders in an IFC communicate with their own receiver (unicast) while those in a C-MAC communicate with both receivers (multicast). The instantaneous fading state between every transmit-receive pair in this network is assumed to be known at all transmitters and receivers. Under an average power constraint at each source, the sum-capacity of the C-MAC and the power policy that achieves this capacity is developed. The conditions defining the classes of strong and very strong ergodic IFCs are presented and the multicast sum-capacity is shown to be tight for both classes.

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