Simultaneous Information and Energy Transfer in Large-Scale FA-enabled Cellular Networks

In this paper, we study the performance of fluid antenna (FA)-enabled user equipments (UEs) in the context of simultaneous wireless information and power transfer (SWIPT) networks. All UEs have successive interference cancellation (SIC) capabilities and employ a novel port selection (PS) scheme. In contrast to existing PS approaches, where the FA port with the highest signal-to-interference ratio (SIR) is selected, a UE communicates with its serving base station (BS) through the port that offers the minimum SIR. The proposed PS scheme leverages the additional degree of freedom offered by the FA technology to ensure the successful implementation of the SIC process, leading to an improved information decoding (ID) and energy harvest (EH) performance. By using stochastic geometry tools, analytical expressions for the ID and EH outage probability are derived. Our results illustrate that the employment of the proposed PS scheme leads to improved ID and EH performance of around 10% compared to conventional PS schemes.