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Cross-Layer Combining of Information-Guided Transmission with Network Coding Relaying for Multiuser Cognitive Radio Systems

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2 Author(s)
Yuli Yang ; King Abdullah Univ. of Sci. & Technol. (KAUST), Thuwal, Saudi Arabia ; Aissa, S.

For a cognitive radio relaying network, we propose a cross-layer design by combining information-gnided transmission at the physical layer and network coding at the network layer. With this design, a common relay is exploited to help the communications between multiple secondary source-destination pairs, which allows for a more efficient use of the radio resources, and moreover, generates less interference to primary licensees in the network. Considering the spectrum-sharing constraints on the relay and secondary sources, the achievable data rate of the proposed cross-layer design is derived and evaluated. Numerical results on average capacity and uniform capacity in the network under study substantiate the efficiency of our proposed design.

Published in:

Wireless Communications Letters, IEEE  (Volume:2 ,  Issue: 1 )