RT - Journal Article T1 - Energy Efficiency of Massive MIMO Cognitive Radio Networks in Presence of Smart Jamming JF - ITRC YR - 2019 JO - ITRC VO - 11 IS - 3 UR - http://ijict.itrc.ac.ir/article-1-422-en.html SP - 1 EP - 8 K1 - Physical layer security K1 - massive MIMO K1 - cognitive radio network K1 - jamming K1 - energy efficiency K1 - convex optimization K1 - power allocation. AB - We study the problem of physical layer security in massive multiple-input multiple-output (MaMIMO) cognitive radio networks (CRNs). In particular, we investigate the design of a smart jamming attack on the uplink transmission of a CRN in the presence of a single antenna jammer. The jammer is aware of the transmission protocol as well as the pilot set used for channel training in the MaMIMO systems. It attacks both the training and data transmission phases but with different powers. To have the most destructive attack, the jammer optimally divides its power between two phases to minimize the maximum energy efficiency of the secondary system. The resulting power optimization is a non-convex problem and to solve it, we propose a method to transform it into a convex optimization problem. Numerical results illustrate the effectiveness of the proposed smart jamming attack in decreasing the energy efficiency of the secondary MaMIMO system. LA eng UL http://ijict.itrc.ac.ir/article-1-422-en.html M3 ER -