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Fractional Programming based Optimization Techniques for RIS-assisted SWIPT-IoT system
Department of Electrical Engineering, Indian Institute of Technology at Indore, Indore, India.
Department of Electrical Engineering, Indian Institute of Technology at Indore, Indore, India.
Interdisciplinary Centre for Security, Reliability and Trust (SnT), University of Luxembourg, Luxembourg City, Luxembourg.
Interdisciplinary Centre for Security, Reliability and Trust (SnT), University of Luxembourg, Luxembourg City, Luxembourg. (Signal Processing)ORCID iD: 0000-0003-2298-6774
2024 (English)In: IEEE Communications Letters, ISSN 1089-7798, Vol. 28, no 12, p. 2819-2823Article in journal (Refereed) Published
Abstract [en]

This letter addresses two distinctly poised objectives, i.e., data rate and energy harvesting (EH) in Simultaneous Wireless Information and Power Transfer (SWIPT) systems with Reconfigurable Intelligent Surface (RIS) by tackling a weighted objective to maximize data rate, EH, and transmit power utilization for multi-antenna BS and multiple RIS-User scenarios. This approach optimizes power splitting (PS) ratio at the end-user and transmit power using an optimized practical phase-dependent amplitude model for each RIS element reflectivity. Fractional programming-based Dinkelbach and Quadratic transform-related algorithms are proposed and compared with Karush-Kuhn-Tucker (KKT) conditions based solutions. Optimized discrete phase shift (DPS) level has been sought. Numerical results show that deploying more RIS elements and placing them closer together enhances both information rate and EH, whereas it nearly saturates with increasing DPS levels.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE) , 2024. Vol. 28, no 12, p. 2819-2823
Keywords [en]
Reconfigurable intelligent surfaces;Simultaneous wireless information and power transfer;Optimization;Internet of Things;Wireless communication;Reflection;Linear programming;Energy efficiency;Data models;Transmitting antennas;Reconfigurable intelligent surfaces (RIS);simultaneous wireless information and power transfer (SWIPT);energy-harvesting;IoT;power-splitting (PS);fractional programming
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-364736DOI: 10.1109/LCOMM.2024.3481289ISI: 001376009100041Scopus ID: 2-s2.0-85208261564OAI: oai:DiVA.org:kth-364736DiVA, id: diva2:1970117
Note

QC 20250617

Available from: 2025-06-16 Created: 2025-06-16 Last updated: 2025-08-25Bibliographically approved

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