Decode-and-forward relay based bidirectional wireless information and power transfer

摘要

In this paper, we propose the de-code-and-forward (DF) based bidirectional wireless information and power transfer (BWIPT) in two-hop relay systems, where the bidirectional relay can decode and forward information from the user to the access point (AP), and assist the wireless power transfer from the AP to the user. To maximize the information rate from the user to the AP, we derive the closed form expression of the optimal power splitting (PS) factor, and the time allocation scheme to obtain the optimal time switching (TS) factor. Simulation results show that for both PS and TS protocols, the proposed DF based bidirectional relay systems can improve the information rate as compared with the amplify-and-forward (AF) based bidirectional relay systems.