Throughput Analysis of a Hybridized Power-Time Splitting Based Relaying Protocol for Wireless Information and Power Transfer in Cooperative Networks

In this paper, a hybridized power-time splitting-based relaying (HPTSR) protocol for simultaneous wireless information and power transfer (SWIPT) in three-node communication networks is proposed. In particular, the influence of the harvested energy at the relay node, which depends on channel power gain, on the throughput performance of the considered network was studied. To determine the throughput at the destination, an analytical expression for the outage probability of the HPTSR protocol under a delay-constrained transmission mode was developed. We showed that the maximized throughput of the system depends on system parameters. Numerical analysis indicated the practical impact of system parameters, such as the channel-based power splitting (PS) factor, time switching (TS) factor, transmitted power from the source, source transmission rate, and distance between source and relay, on the throughput performance of the proposed HPTSR protocol using amplify-and-forward and decode-and-forward relaying. All analytical results were verified through numerical simulations. Finally, the proposed HPTSR protocol outperformed the time-power switching-based and PS-based relaying protocols presented in the literature with significant SWIPT gain at relatively high signal-to-noise ratios.