Secrecy outage probability in cognitive radio networks subject to Rayleigh fading channels

2018 ◽  
Author(s):  
Mounia Bouabdellah ◽  
Faissal El Bouanani ◽  
Hussain Ben-azza
Keyword(s):  
Cognitive Radio ◽  
Outage Probability ◽  
Fading Channels ◽  
Cognitive Radio Networks ◽  
Rayleigh Fading ◽  
Radio Networks ◽  
Rayleigh Fading Channels ◽  
Secrecy Outage Probability ◽  
Secrecy Outage

scholarly journals Optimal Improper Gaussian Signaling for Physical Layer Security in Cognitive Radio Networks

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Guilherme Oliveira ◽  
Evelio Fernández ◽  
Samuel Mafra ◽  
Samuel Montejo-Sánchez ◽  
César Azurdia-Meza
Keyword(s):  
Energy Efficiency ◽  
Cognitive Radio ◽  
Outage Probability ◽  
Cognitive Radio Networks ◽  
Physical Layer Security ◽  
Physical Layer ◽  
Radio Networks ◽  
Spectrum Efficiency ◽  
Secrecy Outage Probability ◽  
Secrecy Outage

The next generations of wireless communications are expected to have great demand for security and spectrum efficiency, and the current secrecy solutions may not be enough. In this paper we propose an optimization framework to address the physical layer security in cognitive radio networks when the secondary users employ improper Gaussian signaling. We resort to genetic algorithms to find optimal values of the secondary transmit power and the degree of impropriety, simultaneously. Then, two different problems regarding the system performance are solved: minimizing the secrecy outage probability and maximizing the secondary achievable rate. In both problems we evaluate, besides the secrecy outage probability, the effective secure throughput and the secure energy efficiency of the system as well. The results show that the secondary network using improper signaling outperforms conventional proper signaling in terms of secrecy outage probability and the effective secure throughput, while in terms of the secure energy efficiency, adopting proper signals attains better performance than improper ones.

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