Title: An energy harvesting fairness maximisation for active/passive IRS-assisted PS-SWIPT system

Authors: Pham Viet Tuan; Van-Quang-Binh Ngo; Pham Ngoc Son; Van Hiep Vu

Addresses: Faculty of Physics, University of Education, Hue University, Thua Thien Hue, Vietnam ' Faculty of Physics, University of Education, Hue University, Thua Thien Hue, Vietnam ' Faculty of Electrical and Electronics Engineering, Ho Chi Minh City University of Technology and Education, Ho Chi Minh City, Vietnam ' NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, 70000, Vietnam

Abstract: In this study, broadcast power-splitting simultaneous wireless information and power transfer (SWIPT) assisted by active/passive intelligent reflecting surface (IRS) is investigated to enhance the harvested energy of receivers under the constraints of data rate and limited transmission powers. The maximisation of minimum harvested energy is investigated by jointly optimising the beamforming vector and power-splitting (PS) factors at the transmitter and the receivers, the amplification factors, and/or the phase shifts at the active/passive IRS. The alternating optimisation, successive convex approximations, and feasible point pursuit methods cooperate to find the near-optimal solution. Finally, the numerical simulation presents the convergence and effectiveness of the proposed algorithm.

Keywords: active/passive intelligent reflecting surface; simultaneous wireless information and power transfer; power-splitting; alternating optimisation.

DOI: 10.1504/IJAHUC.2025.147751

International Journal of Ad Hoc and Ubiquitous Computing, 2025 Vol.49 No.4, pp.215 - 224

Received: 12 Jul 2024
Accepted: 18 Sep 2024
Published online: 30 Jul 2025 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article