Energy Efficiency of Ambient Backscattering-Based Cognitive Radio Networks Under Jamming Attack

In this paper, we present the opportunistic ambient backscatter communication (ABC) for improving the energy efficiency (EE) of a cognitive radio (CR) system, in the presence of a jamming attack. In particular, we consider an energy-harvesting- aided ABC CR system, that enables simultaneous improvements in spectral efficiency and energy utility. The expressions for sum rate, energy consumption and EE of the considered system are expressed in closed form to render convenience in numerical analysis. In addition, an optimization problem is formulated to maximize EE of the CR network, subject to the imperfect sensing constraints and interference from primary user and jammer. Simulation results presented for corroborating the analytical results and to demonstrate the improvement in performance of the proposed system in terms of data rate and EE.