Bounds on ASR Under Energy Acquisition Conditions in Hybrid RF/VLC Systems

Energy acquisition from visible light communication (VLC) signals has recently received research focus in hybrid radio frequency (RF)/VLC systems. In this paper, we study the effect of energy acquisition on the achievable sum-rate (ASR) of these systems. The joint uplink-downlink ASR maximization in a time-switching energy acquisition-based hybrid RF/VLC system is investigated. We obtain fundamental results on the optimal time for performing energy acquisition. Furthermore, strict bounds on ASR pertaining to the energy acquisition conditions have also been obtained. Through simulations, it is observed that the optimal time coefficient obtained in this work outperforms the existing energy acquisition schemes by 40 Mbps in the ASR.