Energy harvesting in amplify-and-forward relaying systems with interference at the relay

Harvesting energy from Radio-Frequency (RF) signals is an arising solution for prolonging the lifetime of wireless networks where relay node is energy-constrained. In this paper, an interference aided energy harvesting scheme is proposed for cooperative relaying systems, where relay harvests energy from signals transmitted from source and co-channel interferences, and then consumes that energy for forwarding the information signal to the destination. A Time Switching-based Relaying Protocol (TSR) is proposed to allow energy harvesting and information processing at the relay. Applying the proposed approach to an amplify-and-forward relaying system with the three-terminal model-the source, the relay and the destination, the approximated analytical results expressed in closed-form of the outage probability is derived to analyze the performance of the system. Furthermore the ergodic capacity, which expressed in integral-form, is derived in order to determine the achievable throughputs. In addition, the achievable throughput of the system is investigated.