New, Wee Kiat;
Wong, Kai-Kit;
Xu, Hao;
Tong, Kin-Fai;
Chae, Chan-Byoung;
(2023)
Fluid Antenna System: New Insights on Outage Probability and Diversity Gain.
IEEE Transactions on Wireless Communications
10.1109/twc.2023.3276245.
(In press).
Preview |
PDF
Fluid_Antenna_System_New_Insights_on_Outage_Probability_and_Diversity_Gain.pdf - Accepted Version Download (2MB) | Preview |
Abstract
To enable innovative applications and services, both industry and academia are exploring new technologies for sixth generation (6G) communications. One of the promising candidates is fluid antenna system (FAS). Unlike existing systems, FAS is a novel communication technology where its antenna can freely change its position and shape within a given space. Compared to the traditional systems, this unique capability has the potential of providing higher diversity and interference-free communications. Nevertheless, the performance limits of FAS remain unclear as its system properties are difficult to analyze. To address this, we approximate the outage probability and diversity gain of FAS in closed-form expressions. We then propose a suboptimal FAS with N * ports, where a significant gain can be obtained over FAS with N * - 1 ports whilst FAS with N * + 1 ports only yields marginal improvement over the proposed suboptimal FAS. In this paper, we also provide analytical and simulation results to unfold the key factors that affect the performance of FAS. Limited to systems with one active radio frequency (RF)-chain, we show that the proposed suboptimal FAS outperforms single-antenna (SISO) system and selection combining (SC) system in terms of outage probability. Interestingly, when the given space is λ/2, the outage probability of the proposed suboptimal FAS with one active RF-chain achieves near to that of the maximal ratio combining (MRC) system with multiple active RF-chains.
| Type: | Article |
|---|---|
| Title: | Fluid Antenna System: New Insights on Outage Probability and Diversity Gain |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/twc.2023.3276245 |
| Publisher version: | https://doi.org/10.1109/TWC.2023.3276245 |
| 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, Correlation, Signal to noise ratio, Probability, Power system reliability, Fluids, Diversity methods |
| 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/10170533 |
Archive Staff Only
 |
View Item |
