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
pp. 1-5.
10.1109/lwc.2025.3594112.
(In press).
Preview |
PDF
On_Fundamental_Limits_of_Slow-Fluid_Antenna_Multiple_Access_for_Unsourced_Random_Access.pdf - Accepted Version Download (439kB) | Preview |
Abstract
Massive connectivity in future networks demands fundamental advancements in multiple access techniques. Notably, unsourced random access (URA) and fluid antenna multiple access (FAMA) offer significant capacity improvements through coding gain and spatial diversity. In this work, we present the slow-FAMA (s-FAMA) URA model, along with detailed analyses of achievable bounds and performance floors for URA in a multi-input multi-output (MIMO) system. Closedform expressions are provided for both the achievable rates and performance floors. Compared to existing MIMO URA bounds, the proposed approach significantly improves system capacity in both single-user and multi-user scenarios. Numerical results further demonstrate the performance gains enabled by the proposed s-FAMA URA model.
| 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/10211956 |
Archive Staff Only
 |
View Item |
