Zhang, Zhentian;
Wong, Kai-Kit;
Dang, Jian;
Zhang, Zaichen;
Masouros, Christos;
Chae, Chan-Byoung;
(2025)
On Fundamental Limits of Slow-Fluid Antenna Multiple Access for Unsourced Random Access.
IEEE Wireless Communications Letters
, 14
(11)
pp. 3455-3459.
10.1109/LWC.2025.3594112.
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Abstract
Massive connectivity in future networks demands fundamental solutions for novel multiple access techniques. Notably, unsourced random access (URA) and fluid antenna multiple access (FAMA) offer significant capacity improvements through coding gain and spatial diversity gain. In this work, the slow-FAMA (s-FAMA) URA model is presented, with detailed propositions on achievable bounds and performance floor for URA in a multi-input and multi-output (MIMO) system. Both achievable results and performance floors are provided in closedform expressions. Compared to existing MIMO URA bounds, the system capacity is substantially improved in both singleuser and multi-user scenarios. Numerical results demonstrate the promising enhancement from the presented s-FAMA URA.
| Type: | Article |
|---|---|
| Title: | On Fundamental Limits of Slow-Fluid Antenna Multiple Access for Unsourced Random Access |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/LWC.2025.3594112 |
| Publisher version: | https://doi.org/10.1109/LWC.2025.3594112 |
| 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. |
| Keywords: | Fluid antenna system (FAS), slow/fast-fluid antenna multiple access (s/f-FAMA), unsourced random access (URA), multi-input and multi-output (MIMO) system |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS 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/10219728 |
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