Title:Relay Control for Full-Duplex Relaying with Wireless Information and Energy Transfer

Abstract:This study investigates wireless information and energy transfer for dual-hop amplify-and-forward full-duplex relaying systems. By applying time switching as a relay transceiver architecture, the full duplex information relaying can be powered by energy harvested from the source-emitted radio frequency signal. The throughputs are analyzed for three relay control schemes, including the maximum relay, optimal relay, and target relay. Analytical expressions for outage probability and ergodic capacity are also presented for these considered relay control schemes. The time switching factors that maximize the relaying transmission time with collateral energy harvesting benefits are presented for the optimal relay and target relay, which incorporate instantaneous channel information to increase the throughput over the maximum relay. Without requiring channel information for the second-hop, the target relay can ensure competitive performance for the outage probability and ergodic capacity. It is also observed that the throughput decreases dramatically for the target relay when the full-duplex relay moves away from the source toward the destination, while the smallest throughputs are obtained for the maximum relay and optimal relay when the full-duplex relay is placed midway between the source and destination.