On the Maximum Sum-rate Capacity of Cognitive Multiple Access Channel

Details On the Maximum Sum-rate Capacity of Cognitive Multiple Access Channel On the Maximum Sum-rate Capacity of Cognitive Multiple Access Channel

2006-12-05

arxiv.org/abs/cs/0612024v1

Computer Science

Information Theory

3 pages, 4 figures

Scientific paper

We consider the communication scenario where multiple cognitive users wish to communicate to the same receiver, in the presence of primary transmission. The cognitive transmitters are assumed to have the side information about the primary transmission. The capacity region of cognitive users is formulated under the constraint that the capacity of primary transmission is not changed as if no cognitive users exist. Moreover, the maximum sum-rate point of the capacity region is characterized, by optimally allocating the power of each cognitive user to transmit its own information.

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