Marques da Silva, MárioGashtasbi, AliDinis, RuiPembele, GelsonCorreia, AméricoGuerreiro, João2024-09-272024-09-272024-03-102079-9292PURE: 99742010PURE UUID: a1b1c2fb-fabd-4d68-bffd-120f2c1f1444Scopus: 85188784013WOS: 001191622300001ORCID: /0000-0002-8520-7267/work/168463540ORCID: /0000-0001-5106-239X/work/168463718http://hdl.handle.net/10362/172578Funding Information: We acknowledge the support of FCT/MCTES, as described above in the funding section. We also acknowledge the support of Autonoma TechLab for providing an interesting environment in which to carry out this research. Funding Information: This work is funded by FCT/MCTES through national funds and, when applicable, co-funded EU funds under the projects UIDB/EEA/50008/2020 and 2022.03897.PTDC. Publisher Copyright: © 2024 by the authors.One of the key technologies of 6G communications relies on large intelligent surfaces (LIS), which can be viewed as a near-field beamformer that is supportive of extremely high symbol rates and enables a high level of interference avoidance. This article focuses on LIS systems, analysing the impact of the use of a whole LIS system or a subset of an antenna array. We analyse an LIS system associated with a single carrier with frequency domain equalization (SC-FDE), and with different receiver types of varying complexities. Because it is a function of the number of antennas, the computational complexity decreases when antenna elements that are closer to the user equipment are used instead of the whole LIS. Moreover, with a partial LIS, a reduction of energy consumption is achieved, and mitigation of the interference levels is obtained, allowing a performance very close to that obtained with the whole LIS system.122389427eng6GLIS systemsreceiver typesSC-FDEControl and Systems EngineeringSignal ProcessingHardware and ArchitectureComputer Networks and CommunicationsElectrical and Electronic EngineeringSDG 7 - Affordable and Clean Energyjournal article10.3390/electronics13061035https://www.scopus.com/pages/publications/85188784013