Optimizing Cooperative Cognitive Radio Networks with Opportunistic Access
Type
ArticleKAUST Department
Communication Theory LabComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2012-05-20Online Publication Date
2012-05-20Print Publication Date
2012Permanent link to this record
http://hdl.handle.net/10754/244131
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Optimal resource allocation for cooperative cognitive radio networks with opportunistic access to the licensed spectrum is studied. Resource allocation is based on minimizing the symbol error rate at the receiver. Both the cases of all-participate relaying and selective relaying are considered. The objective function is derived and the constraints are detailed for both scenarios. It is then shown that the objective functions and the constraints are nonlinear and nonconvex functions of the parameters of interest, that is, source and relay powers, symbol time, and sensing time. Therefore, it is difficult to obtain closed-form solutions for the optimal resource allocation. The optimization problem is then solved using numerical techniques. Numerical results show that the all-participate system provides better performance than its selection counterpart, at the cost of greater resources. © 2012 Ammar Zafar et al.Citation
Zafar A, Alouini M-S, Chen Y, Radaydeh RM (2012) Optimizing Cooperative Cognitive Radio Networks with Opportunistic Access. Journal of Computer Networks and Communications 2012: 1-9. doi:10.1155/2012/294581.Publisher
Hindawi LimitedAdditional Links
http://www.hindawi.com/journals/jcnc/2012/294581/ae974a485f413a2113503eed53cd6c53
10.1155/2012/294581
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