IRS-Assisted Wireless Powered NOMA: A Multi-band Scenario

Gabriela A. dos Santos, Francisco X. A. Sobrinho, Francisco Rafael Marques Lima

DOI: 10.14209/sbrt.2025.1571156555

Evento: XLIII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais (SBrT2025)

Keywords: IRS Wireless Powered Networks Multi-band NOMA

Abstract

Wireless Powered Communication Networks (WPCNs) enable low-cost devices to harvest energy and transmit data wirelessly, yet face coverage and efficiency limitations. Intelligent Reflecting Surfaces (IRSs) emerge as a promising solution to enhance both Downlink Wireless Power Transfer (DL WPT) and Uplink Wireless Information Transmission (UL WIT) by intelligently reconfiguring the propagation environment. This paper studies the deployment of a single IRS to enhance the performance of WPCNs operating at different frequencies. We propose a joint optimization framework for IRS phase-shift configuration and resource allocation using Non-Orthogonal Multiple Access (NOMA) with Successive Interference Cancellation (SIC). Our solution assigns a determined number of ideal phase-shifts per WPCN while fixing the remaining on 0/2π. Results show significant sum-rate gains and highlight performance gaps for future improvements.

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