Joint Power Allocation and Splitting for SWIPT Based Two-Way Multiplicative AF Relay Networks

Abstract

This paper investigates an energy-constrained two-way multiplicative amplify-and-forward (AF) relay network, where an energy harvesting model is equipped at the relay node to achieve simultaneous wireless information and power transfer (SWIPT). We design a joint power allocation and splitting (JoPAS) scheme by combining Dinkelbach with particle swarm optimization iterative algorithm. The relay adjusts the power allocation ratio and power splitting ratio, respectively, and realizes a current time trade-off between the harvested energy and the power of the retransmitted signal. Specifically, we formulate an optimization problem to maximize the outage throughput of considered system. Numerical results are given to verify a great deal of speculation, and show the superior outage throughput performance of the proposed scheme by comparing with peer strategy designed.