  This paper considers the problem of maximizing the sum-rate for simultaneous
wireless information and power transfer (SWIPT) in a full-duplex bi-directional
communication system subject to energy harvesting and transmit power
constraints at both nodes. We investigate the optimum design of the receive
power splitters and transmit powers for SWIPT in full-duplex mode. Exploiting
rate-split method, an iterative algorithm is derived to solve the non-convex
problem. The effectiveness of the proposed algorithm is justified through
numerical simulations.
