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Deep Learning Enabled Slow Fluid Antenna Multiple Access

Waqar, Noor; Wong, Kai-Kit; Tong, Kin-Fai; Sharples, Adrian; Zhang, Yangyang; (2023) Deep Learning Enabled Slow Fluid Antenna Multiple Access. IEEE Communications Letters 10.1109/lcomm.2023.3237595. (In press). Green open access

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Abstract

The increasing interest of fluid antenna systems is reinforced by an unprecedented way of achieving multiple access, by exploiting moments of deep fades in space. This phenomenon, referred to as fluid antenna multiple access (FAMA), allows the fluid antenna at each user to be switched to a location in space (i.e., port) where the sum-interference power collectively suffers from a deep fade, resulting in a decent signal reception without the need of complex signal processing. Nevertheless, selecting the best port is an arduous task, which requires a large number of channel observations to obtain the high performance gain. This letter aims to devise a low-complexity port selection scheme for FAMA where each user has a small number of port observations only. We assume slow FAMA ( s -FAMA) so that the selected port remains unchanged until the channel conditions change. A deep learning approach is proposed to infer the signal-to-interference plus noise ratios (SINR) at all the available ports given only a small number of observations. The simulation results exhibit that the proposed scheme is able to attain significant reductions in outage probability, and improvements in multiplexing gain, from a relatively small number of available port observations, showing great potential for future multiple access technologies.

Type: Article
Title: Deep Learning Enabled Slow Fluid Antenna Multiple Access
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/lcomm.2023.3237595
Publisher version: https://doi.org/10.1109/LCOMM.2023.3237595
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. - For the purpose of open access, the authors have applied a Creative Commons Attribution (CC BY) licence to any Author Accepted Manuscript version arising.
Keywords: Deep learning, Fluid antenna, Multiple access, Multiuser communications, Slow FAMA
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10164098
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