Cell-free massive MIMO SWIPT with beyond diagonal reconfigurable intelligent surfaces

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Abstract

This paper investigates the integration of beyond diagonal reconfigurable intelligent surfaces (BD-RISs) into cell free massive multiple-input multiple-output (CF-mMIMO) systems, focusing on applications involving simultaneous wireless information and power transfer (SWIPT). The system supports concurrently two user groups: information users (IUs) and energy users (EUs). A BD-RIS is employed to enhance the wireless power transfer (WPT) directed towards the EUs. To comprehensively evaluate the system’s performance, we present an analytical framework for the spectral efficiency (SE) of IUs and the average harvested energy (HE) of EUs in the presence of spatial correlation among the BD-RIS elements and for a non-linearenergy harvesting circuit. Our findings offer important insights into the transformative potential of BD-RIS, setting the stage for the development of more efficient and effective SWIPT networks.Finally, incorporating a heuristic scattering matrix design at theBD-RIS results in a substantial improvement compared to the scenario with random scattering matrix design.
Original languageEnglish
Title of host publication2024 IEEE Wireless Communications and Networking Conference (WCNC): Proceedings
PublisherIEEE Xplore
Number of pages6
ISBN (Electronic)9798350303582
ISBN (Print)9798350303599
DOIs
Publication statusPublished - 03 Jul 2024

Publication series

NameIEEE Wireless Communications and Networking Conference (WCNC): Proceedings
ISSN (Print)1525-3511
ISSN (Electronic)1558-2612

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