Secure Communication With a Wireless-Powered Friendly Jammer

—In this paper, we propose using a wireless-powered friendly jammer to enable secure communication between a source node and destination node, in the presence of an eavesdropper. We consider a two-phase communication protocol with fixed-rate transmission. In the first phase, wireless power transfer is conducted from the source to the jammer. In the second phase, the source transmits the information-bearing signal under the protection of a jamming signal sent by the jammer using the harvested energy in the first phase. We analytically characterize the long-term behavior of the proposed protocol and derive a closedform expression for the throughput. We further optimize the rate parameters for maximizing the throughput subject to a secrecy outage probability constraint. Our analytical results show that the throughput performance differs significantly between the singleantenna jammer case and the multiantenna jammer case. For instance, as the source transmit power increases, the thro...

• Type: Journal
• Year: 2016
• Where: TWC
• Authors: Wanchun Liu, Xiangyun Zhou, Salman Durrani, Petar Popovski
• Keywords: TWC 2016