Fluid Antenna Multiple Access

By Kai‐Kit Wong, Kin-Fai Tong. IEEE Transactions on Wireless Communications, 2020

377 citations recorded by the source corpus.

Fluid antenna system represents an emerging technology that enables an antenna to switch its physical location in a predefined space. This paper explores the potential of using a single fluid antenna at each mobile user for multiple access, which we refer to it as fluid antenna multiple access (FAMA). FAMA exploits spatial moments of deep fade suffered by the interference to achieve a favourable channel condition for the desired signal, without requiring sophisticated signal processing. We analyze the FAMA network by first deriving the outage probability of the signal-to-interference ratio (SIR) in a double integral form. We then obtain an outage probability upper bound in closed form and an average outage rate lower bound for the FAMA system, with an arbitrary number of interferers, from which the multiplexing gain of FAMA is characterized. We also estimate how large the number of locations is required to achieve a given multiplexing gain using fluid antennas with a given size. Results show that it is possible for FAMA to support hundreds of users using only one fluid antenna of a few wavelengths of space at each user, giving rise to significant gain in the average network outage rate.

Subfields: Aerospace Engineering, Computer Networks and Communications

View Paper: https://www.semanticscholar.org/paper/a42b5f73f497fdd833f5febff79b93e428e11e80

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Aerospace Engineering

1. Rui Zhang
2. Lipeng Zhu
3. Wenyan Ma
4. Robert Schober
5. Zhiguo Ding
6. Boyu Ning
7. H. Vincent Poor
8. Qingqing Wu

In Computer Networks and Communications

1. Robert Schober
2. H. Vincent Poor
3. Zhiguo Ding
4. Lipeng Zhu
5. Rui Zhang
6. Wenyan Ma
7. Yong Zeng
8. Qingqing Wu

Citations in the corpus

• A Tutorial on Fluid Antenna System for 6G Networks: Encompassing Communication Theory, Optimization Methods and Hardware Designs (2024, methodology): “In this context, researchers in FAS have explored the concept of fluid antenna multiple access (FAMA) [73], [74], considering opportunistic FAMA [75], [76], compact ultra massive antenna array (CUMA) [77] and other variations to achieve the goal of TK µ extreme connectivity.”
• MIMO Capacity Characterization for Movable Antenna Systems (2022, background): “Moreover, the fluid antenna multiple access (FAMA) was studied in [16] to support multiple transceivers with a single fluid antenna at each mobile user.”
• Movable-Antenna Enhanced Multiuser Communication via Antenna Position Optimization (2023, background): “Then, the results were extended to multiuser systems in [22], where multiple transceivers can send/receive signals simultaneously with the interference mitigated by switching the physical location of the fluid antenna at each user’s Rx.”
• Flexible-Antenna Systems: A Pinching-Antenna Perspective (2024, positive): “As the latest members of the flexible-antenna system family, both fluid antennas and movable antennas are based on the idea to change the locations of the antennas at the transceivers, such that more favorable channel conditions are experienced by the transceivers [12], [13], [14], [15].”
• Modeling and Performance Analysis for Movable Antenna Enabled Wireless Communications (2022, background): “However, the discrete port-based channel model employed in [30] and [31] cannot completely characterize and fully exploit the wireless channel spatial variation in continuous regions.”