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The availability of positional information is of great importance in many commercial, public safety, and military applications. The coming years will see the emergence of location-aware networks with sub-meter accuracy, relying on accurate…

Information Theory · Computer Science 2010-06-07 Yuan Shen , Moe Z. Win

The fluid antenna system (FAS) concept is an emerging paradigm that promotes the utilization of the feature of shape and position reconfigurability in antennas to broaden the design of wireless communication systems. This also means that…

Information Theory · Computer Science 2025-09-11 Xusheng Zhu , Kai-Kit Wong , Hao Xu , Han Xiao , Hanjiang Hong , Hyundong Shin , Yangyang Zhang

Fluid antenna systems (FAS) are an emerging technology that promises a significant diversity gain even in the smallest spaces. Motivated by the groundbreaking potentials of liquid antennas, researchers in the wireless communication…

Information Theory · Computer Science 2023-01-02 Malek Khammassi , Abla Kammoun , Mohamed-Slim Alouini

Most existing antenna array-based source localization methods rely on fixed-position arrays (FPAs) and strict assumptions about source field conditions (near-field or far-field), which limits their effectiveness in complex, dynamic…

Over the past decades, multiple antenna technologies have appeared in many different forms, most notably as multiple-input multiple-output (MIMO), to transform wireless communications for extraordinary diversity and multiplexing gains. The…

Information Theory · Computer Science 2020-05-26 Kai-Kit Wong , Arman Shojaeifard , Kin-Fai Tong , Yangyang Zhang

This paper investigates a design framework for sparse fluid antenna systems (FAS) enabling high-performance direction-of-arrival (DOA) estimation, particularly in challenging millimeter-wave (mmWave) environments. By ingeniously harnessing…

Signal Processing · Electrical Eng. & Systems 2025-08-15 He Xu , Tuo Wu , Ye Tian , Ming Jin , Wei Liu , Qinghua Guo , Maged Elkashlan , Matthew C. Valenti , Chan-Byoung Chae , Kin-Fai Tong , Kai-Kit Wong

We introduce a novel received signal strength intensity (RSSI)-based positioning method using fluid antenna systems (FAS), leveraging their inherent channel correlation properties to improve location accuracy. By enabling a single antenna…

Signal Processing · Electrical Eng. & Systems 2025-03-04 Wenzhi Liu , Zhisheng Rong , Xiayue Liu , Yufei Jiang , Xu Zhu

Fluid antennas (FAs) is a promising technology for introducing flexibility and reconfigurability in wireless networks. Recent research efforts have highlighted the potential gains that can be achieved in comparison to conventional antennas.…

Signal Processing · Electrical Eng. & Systems 2023-11-03 Constantinos Psomas , Peter J. Smith , Himal A. Suraweera , Ioannis Krikidis

The fluid antenna system (FAS) refers to a family of reconfigurable antenna technologies that provide substantial spatial gains within a compact, predefined small space, thereby offering extensive degrees of freedom in the physical layer…

Information Theory · Computer Science 2025-12-18 Zhentian Zhang , Jian Dang , David Morales-Jimenez , Hao Jiang , Zaichen Zhang , Christos Masouros , Chan-Byoung Chae

The explosive growth of teletraffic, fueled by the convergence of cyber-physical systems and data-intensive applications, such as the Internet of Things (IoT), autonomous systems, and immersive communications, demands a multidisciplinary…

In this letter, we study the energy efficiency maximization problem for a fluid antenna system (FAS) in near field communications. Specifically, we consider a point-to-point near-field system where the base station (BS) transmitter has…

Signal Processing · Electrical Eng. & Systems 2024-11-26 Yixuan Chen , Mingzhe Chen , Hao Xu , Zhaohui Yang , Kai-Kit Wong , Zhaoyang Zhang

Fluid antenna systems (FASs) are emerging as a reconfigurable-aperture technology that expands physical-layer design beyond fixed, rigid antenna geometries. While the \emph{fading diversity} of FASs -- which exploits spatial channel…

Information Theory · Computer Science 2026-05-22 Zhentian Zhang , Jingyuan Xu , Kai-Kit Wong , Hao Jiang , Zaichen Zhang , Hyundong Shin

The reconfigurable intelligent surface (RIS) has drawn considerable attention for its ability to enhance the performance of not only the wireless communication but also the indoor localization with low-cost. This paper investigates the…

Information Theory · Computer Science 2023-03-28 Ziyi Gong , Liang Wu , Zaichen Zhang , Jian Dang , Yongpeng Wu , Jiangzhou Wang

Fluid antenna (FA) technology has emerged as a promising approach in wireless communications due to its capability of providing increased degrees of freedom (DoFs) and exceptional design flexibility. This paper addresses the challenge of…

Signal Processing · Electrical Eng. & Systems 2025-08-15 He Xu , Tuo Wu , Ye Tian , Kangda Zhi , Wei Liu , Baiyang Liu , Hing Cheung So , Naofal Al-Dhahir , Kin-Fai Tong , Chan-Byoung Chae , Kai-Kit Wong

Fluid antenna systems (FAS) have recently emerged as a promising paradigm for achieving spatially reconfigurable, compact, and energy-efficient wireless communications in beyond fifth-generation (B5G) and sixth-generation (6G) networks. By…

Signal Processing · Electrical Eng. & Systems 2026-02-02 Saeid Pakravan , Mohsen Ahmadzadeh , Ming Zeng , Wessam Ajib , Ji Wang , Xingwang Li

This paper advocates a fluid antenna system (FAS)-assisted long-range communication (LoRa-FAS) for Internet-of-Things (IoT) applications. \textcolor{blue}{In the proposed system, FAS provides spatial diversity gains for LoRa, eliminating…

Signal Processing · Electrical Eng. & Systems 2025-07-08 Gaoze Mu , Yanzhao Hou , Kai-Kit Wong , Mingjie Chen , Qimei Cui , Xiaofeng Tao , Ping Zhang

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…

Information Theory · Computer Science 2023-05-12 Wee Kiat New , Kai-Kit Wong , Hao Xu , Kin-Fai Tong , Chan-Byoung Chae

The availability of positional information is of great importance in many commercial, governmental, and military applications. Localization is commonly accomplished through the use of radio communication between mobile devices (agents) and…

Information Theory · Computer Science 2016-11-15 Yuan Shen , Henk Wymeersch , Moe Z. Win

Fluid Antenna Systems (FAS) introduce a new degree of freedom for wireless networks by enabling the physical antenna position to adapt dynamically to changing radio conditions. While existing studies primarily emphasize physical-layer…

Networking and Internet Architecture · Computer Science 2026-03-24 Ian F. Akyildiz , Tuğçe Bilen

Reconfigurability is a desired characteristic of future communication networks. From a transceiver's standpoint, this can be materialized through the implementation of fluid antennas (FAs). An FA consists of a dielectric holder, in which a…

Signal Processing · Electrical Eng. & Systems 2023-07-26 Constantinos Psomas , Ghassan M. Kraidy , Kai-Kit Wong , Ioannis Krikidis
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