Performance Analysis for Energy Harvesting Based Wireless Relay Systems

This paper presents strategies for energy harvesting (EH) in an amplify-and-forward (AF) relay system. In order to increase capacity and coverage, we use a relay-aid network with spectrum sensing and EH, thus provide a better quality of service. A relay is deployed to assist communication between a source node and a destination node and to decode information/harvest energy from incoming signals at the same time by using a power splitting scheme. We propose two strategies for EH relaying design in terms of EH capacity and number of relay transmissions. Based on that setting, we derive the total throughput of all relay transmission respect to the received signal-to-noise ratio of the relay link. Numerical simulations demonstrate the validity of the analytical results.