Performance analysis of jamming technique in energy harvesting cognitive radio networks

Abstract

This paper proposes a jamming technique which employs a self-powered secondary jammer to interfere a wire-tapper, who eavesdrops communications between a self-powered secondary source and a secondary destination in energy harvesting cognitive radio networks (EHCRNs). For generality, interference from a primary source, maximum transmit power constraint and interference power constraint are considered in analyzing security performance of the proposed jamming technique in terms of security-reliability compromise. Towards this end, exact expressions of detection/eavesdropping outage probabilities at the destination/the wire-tapper are first proposed and then verified by computer simulations. Finally, results are provided to demonstrate the efficacy of the jamming technique and the key effects (interference from the primary user, power constraints, interference power distribution factor, and time splitting factor) on security performance of EHCRNs.