Rate Splitting Multiple Access for a MISO SWIPT System Aided by a Power Beacon

Abstract

In this paper, we investigate a multiple-input single-output (MISO) rate-splitting multiple access (RSMA) system by using the simultaneous wireless information and power transfer (SWIPT) technology. A base station (BS) co-exists with a power beacon (PB) to transmit energy and information to several energy harvesting (EH) users and power-splitting users. We minimize the transmission power of the PB and BS subject to rate and EH requirements. The semidefinite relaxation technique and the particle swarm optimization algorithm are used to solve the non-convex problem. Simulation results proved the significant reduction in the transmission power achieved by RSMA compared with several conventional methods.