Energy Efficiency Maximization of the SWIPT-based Full-Duplex Relay Cooperative System

Aiming to maximize the energy efficiency of wireless communication to achieve green communication, this paper studies the energy efficiency optimization problem of full-duplex relay cooperative system based on simultaneous wireless information and power transfer (SWIPT). For the power-splitting protocol, the energy efficiency is optimized for the power-splitting factor and transmission power. Firstly, a SWIPT-based full-duplex relay cooperative system model is established. Then, it is proved that the energy efficiency formula is a convex function with respect to the power-splitting factor, and the optimal power-splitting factor is obtained. Meanwhile, this paper studies the scheme to improve the energy efficiency of the system by optimizing the source transmission power. Furthermore, a joint optimization algorithm based on iteration is proposed to jointly optimize the power-splitting factor and transmission power. Finally, the simulation results demonstrate the effectiveness of the proposed optimization algorithm.