On Performance Analysis of FD TWR Network with Non-Linear EH Model and Imperfect SIC

Abstract

This paper explores the performance of a power spliting based two-way relay network over the generalized Nakagami-m faded channels in full-duplex (FD) mode. The simultaneous wireless information and power transfer enabled relay node is equipped with a practical non-linear energy harvesting (EH) model with a saturation threshold that bounds the amount of harvested energy, and also shows the practical limitations of a EH model. The imperfect self-interference cancellation is considered that causes residual self-interference (RSI). The decode-and-forward relaying protocol is adopted for the cooperation. The analytical expressions of outage probability (OP), asymptotic OP, system throughput, and energy efficiency are derived. The diversity order of the system is obtained for both the linear and saturation region of non-linear EH model. Comparison between the FD and half-duplex mode of operation is highlighted. The impact of the RSI, saturation threshold of non-linear EH model, and other system parameters are shown. Finally, the derived analytical expressions are validated through Monte-Carlo simulations. © 2022 IEEE.