Wireless information and energy harvesting for bidirectional relay channels: Tradeoff between relay distance and optimal throughput

In this paper, we illustrate performance analysis for three and four time slot transmission schemes (3TS and 4TS) for two-way amplify-and-forward (AF) relaying channels for power transfer protocol and wireless data, in which the energy harvesting (EH) relay node helps to interchange information between two nodes. We derive the throughput and the approximate expressions of outage probability of the 3TS, 4TS transmission schemes and compare these results with the distance allocation number between source node to relay and relay to destination node, and the large scale path loss in order to calculate the optimal throughput. This result depicts that relaying scheme has high opportunities to significantly enhance the performance of systems. In the numerical results, we can see that the performance throughput declines when the distance of both sources rises. Especially, when the distance allocation number increases, the throughput trend decreases for both 3TS and 4TS.