Outage Performance of Cooperative Cognitive Radio Networks under Joint Constraints of Co-Channel Interference, Intercept Probability and Hardware Imperfection

• Main Authors: Pham Thi Dan Ngoc, Tran Trung Duy, Ho Van Khuong
• Format: Article
• Language: English
• Published: European Alliance for Innovation (EAI) 2019-06-01
• Series: EAI Endorsed Transactions on Industrial Networks and Intelligent Systems
• Subjects: physical-layer security; outage probability; intercept probability; underlay cognitive radio
• Online Access: https://eudl.eu/pdf/10.4108/eai.13-6-2019.159124

This paper evaluates outage probability (OP) of a cooperative underlay cognitive radio network in the presence of a passive secondary eavesdropper under joint impacts of limited interference from a primary network and hardware impairments. With intercept probability constraint required for the eavesdropper and interference constraint given by a primary receiver, we derive closed-form expressions of transmit power for the secondary transmitters, including source and relays, only relying on the knowledge of statistical channel state information (CSI). Then, a relay selection method is used in the cooperative phase to enhance the OP performance of the considered protocol. For performance evaluation, we derive an exact closed-form expression of OP over Rayleigh fading channel. Finally, we perform Monte Carlo simulations to verify the derived formulas.