Wireless Communications: Principles and Practice
Wireless Communications: Principles and Practice
Convex Optimization
IEEE Transactions on Mobile Computing
MASS '11 Proceedings of the 2011 IEEE Eighth International Conference on Mobile Ad-Hoc and Sensor Systems
Resource allocation for spectrum underlay in cognitive radio networks
IEEE Transactions on Wireless Communications - Part 2
A survey on spectrum management in cognitive radio networks
IEEE Communications Magazine
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
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This paper focuses on where to place the secondary base station (SBS) so as to obtain the maximum coverage area for a broadcasting cognitive radio network with spectrum underlay. Aiming to solve this problem, the coverage area is first obtained, considering the interference constraints for the primary user (PU) and quality of service constraints for the secondary user. It is found that the location of the SBS takes an important role in the coverage area determination. Then, an optimal location of the SBS is derived to maximize the coverage area in the broadcasting cognitive radio network. Further, considering the local environment can largely determine the characteristics of radio propagation in practice, a typical scenario with an obstacle located between the PU and SBS is analyzed. Numerical results show that the optimal location of the SBS is different with different locations of the obstacle, and will converge to a fixed point as the distance between the PU and the obstacle increases when the obstacle is assumed to be a hill, which is exactly the optimal location of the SBS without the obstacle.