Ye, Y;
You, L;
Xu, H;
Elzanaty, A;
Wong, KK;
Gao, X;
(2025)
Specific Absorption Rate-Aware Multiuser MIMO Assisted by Fluid Antenna System.
IEEE Transactions on Wireless Communications
10.1109/TWC.2025.3586659.
(In press).
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Abstract
With the development of the upcoming sixth-generation (6G) wireless networks, there is a pressing need for innovative technologies capable of satisfying heightened performance indicators. Fluid antenna system (FAS) is proposed recently as a promising technique to achieve higher data rates and more diversity gains by dynamically changing the positions of the antennas to form a more desirable channel. However, worries regarding the possibly harmful effects of electromagnetic (EM) radiation emitted by devices have arisen as a result of the rapid evolution of advanced techniques in wireless communication systems. Specific absorption rate (SAR) is a widely adopted metric to quantify EM radiation worldwide. In this paper, we investigate the SAR-aware multiuser multiple-input multiple-output (MIMO) communications assisted by FAS. In particular, a two-layer iterative algorithm is proposed to minimize the SAR value under signal-to-interference-plus-noise ratio (SINR) and FAS constraints. Moreover, the minimum weighted SINR maximization problem under SAR and FAS constraints is studied by finding its relationship with the SAR minimization problem. Simulation results verify that the proposed SAR-aware FAS design outperforms the adaptive backoff and fixed-position antenna designs.
| Type: | Article |
|---|---|
| Title: | Specific Absorption Rate-Aware Multiuser MIMO Assisted by Fluid Antenna System |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/TWC.2025.3586659 |
| Publisher version: | https://doi.org/10.1109/twc.2025.3586659 |
| 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: | Antennas , Specific absorption rate , MIMO , Fluids , Signal to noise ratio , Downlink , Interference , Minimization , 6G mobile communication , Uplink |
| 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/10211846 |
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