Title :
Cross-Layer Combining of Information-Guided Transmission with Network Coding Relaying for Multiuser Cognitive Radio Systems
Author :
Yuli Yang ; Aissa, Sonia
Author_Institution :
King Abdullah Univ. of Sci. & Technol. (KAUST), Thuwal, Saudi Arabia
Abstract :
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.
Keywords :
cognitive radio; network coding; radio spectrum management; relay networks (telecommunication); cognitive radio relaying network; cross-layer design; information-guided transmission; multiuser cognitive radio systems; network coding relaying; network layer; physical layer; radio resources; secondary source-destination pairs; spectrum sharing constraint; Interference; Network coding; Relays; Transmitting antennas; Vectors; Wireless communication; Cognitive radio; cross-layer design; information-guided transmission (IGT); network coding (NC); relaying;
Journal_Title :
Wireless Communications Letters, IEEE
DOI :
10.1109/WCL.2012.100912.120629