In this paper, we consider a secrecy wireless-powered cognitive radio network, where an energy harvesting secondary system can share the spectrum of the primary system by assisting its transmission. In particular, we focus on the secure information transmission for the secondary system when an eavesdropper is existed to intercept the secondary user’s confidential information. Closed-form analytical expressions of primary outage probability, secondary secrecy outage probability (SOP) and the probability of non-zero secrecy capacity (PNSC) are derived. We also aim to joint design optimal time-switching ratio and power-splitting coefficient for maximizing the secondary secrecy outage probability under primary requirement constraint. To solve this non-convex problem, we prove the biconvexity of optimization problem and then develop a corresponding algorithm to solve that optimization problem. Numerical results show that our proposed transmission scheme can provide greater secure information transmission for secondary system and guarantee the outage performance for primary system.

Additional Metadata
Keywords Biconcave, Cognitive radio network, Energy harvesting, Probability of non-zero secrecy capacity, Secrecy outage probability
Persistent URL dx.doi.org/10.1007/978-981-15-1304-6_1
Series Communications in Computer and Information Science
Citation
Tang, K. (Kun), Liao, S. (Shaowei), Bhuiyan, M.Z.A. (Md. Zakirul Alam), & Shi, W. (2019). Secrecy Outage Probability of Secondary System for Wireless-Powered Cognitive Radio Networks. In Communications in Computer and Information Science. doi:10.1007/978-981-15-1304-6_1