On the capacity of multiple cognitive links through common relay under spectrum-sharing constraints

Abstract
In this paper, we consider an underlay cognitive relaying network consisting of multiple secondary users and introduce a cooperative transmission protocol using a common relay to help with the communications between all secondary source-destination pairs for higher throughput and lower realization complexity. A whole relay-assisted transmission procedure is composed of multiple access phase and broadcast phase, where the relay is equipped with multiple antennas, and the secondary sources and destinations are single-antenna nodes. Considering the spectrum-sharing constraints on the secondary sources and the relay, we analyze the capacity behaviors of the underlay cognitive relaying network under study. The corresponding numerical results provide a convenient tool for the presented network design and substantiate a distinguishing feature of introduced design in that multiple secondary users' communications do not rely on multiple relays, hence allowing for a more efficient use of the radio resources. © 2011 IEEE.

Citation
Yang, Y., & Aissa, S. (2011). On the Capacity of Multiple Cognitive Links through Common Relay under Spectrum-Sharing Constraints. 2011 IEEE International Conference on Communications (ICC). doi:10.1109/icc.2011.5963175

Publisher
Institute of Electrical and Electronics Engineers (IEEE)

Journal
2011 IEEE International Conference on Communications (ICC)

Conference/Event Name
2011 IEEE International Conference on Communications, ICC 2011

DOI
10.1109/icc.2011.5963175

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