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In this paper, we propose a transmission mechanism for fluid antennas (FAs) enabled multiple-input multiple-output (MIMO) communication systems based on index modulation (IM), named FA-IM, which incorporates the principle of IM into…

Information Theory · Computer Science 2023-12-27 Jing Zhu , Gaojie Chen , Pengyu Gao , Pei Xiao , Zihuai Lin , Atta Quddus

Index modulation (IM) significantly enhances the spectral efficiency of fluid antennas (FAs) enabled multiple-input multiple-output (MIMO) systems, which is named FA-IM. However, due to the dense distribution of ports on the FA, the…

Information Theory · Computer Science 2024-08-20 Xinghao Guo , Yin Xu , Dazhi He , Cixiao Zhang , Wenjun Zhang , Yi-yan Wu

The fluid antenna (FA) index modulation (IM)-enabled multiple-input multiple-output (MIMO) system, referred to as FA-IM, significantly enhances spectral efficiency (SE) compared to the conventional FA-assisted MIMO system. To improve…

Information Theory · Computer Science 2024-12-31 Xinghao Guo , Yin Xu , Dazhi He , Cixiao Zhang , Hanjiang Hong , Kai-Kit Wong , Wenjun Zhang , Yiyan Wu

In conventional multiple-input multiple-output (MIMO) communication systems, the positions of antennas are fixed. To take full advantage of spatial degrees of freedom, a new technology called fluid antenna (FA) is proposed to obtain higher…

Information Theory · Computer Science 2024-01-10 Yuqi Ye , Li You , Jue Wang , Hao Xu , Kai-Kit Wong , Xiqi Gao

As an emerging antenna technology, a fluid antenna system (FAS) enhances spatial diversity to improve both sensing and communication performance by shifting the active antennas among available ports. In this letter, we study the potential…

Signal Processing · Electrical Eng. & Systems 2024-05-12 Jiaqi Zou , Hao Xu , Chao Wang , Lvxin Xu , Songlin Sun , Kaitao Meng , Christos Masouros , Kai-Kit Wong

Integrated sensing and communication (ISAC) emerges as an essential technique for overcoming spectrum congestion. However, the performance of traditional ISAC systems with fixed-position-antennas (FPA) is limited due to insufficient spatial…

Signal Processing · Electrical Eng. & Systems 2024-07-30 Tian Hao , Changxin Shi , Qingqing Wu , Bin Xia , Yinghong Guo , Lianghui Ding , Feng Yang

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…

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

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

Stacked intelligent metasurfaces (SIMs) and fluid antenna systems (FAS) are emerging technologies for wave-domain and spatial signal manipulation, respectively.This letter proposes a novel joint SIM-FAS communication model in which…

Information Theory · Computer Science 2026-05-22 Anastasios Papazafeiropoulos

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

The emerging technology of fluid antenna systems (FASs) represents a promising next-generation reconfigurable antenna solution, capable of exploiting the full spatial diversity within a predefined space by finely reconfiguring the positions…

Information Theory · Computer Science 2026-05-26 Jiangsheng Huangfu , Zhengyu Song , Tianwei Hou , Anna Li , Yuanwei Liu , Arumugam Nallanathan

In this paper, we investigate cell-free massive MIMO (CF-mMIMO) systems in which access points (APs) are equipped with fluid antennas (FAs) and develop a comprehensive framework for channel estimation, antenna port selection, and uplink…

Information Theory · Computer Science 2025-12-30 Maryam Olyaee , Giovanni Interdonato , Stefano Buzzi

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

This paper proposes a novel fluid antenna system (FAS)-enabled architecture to improve energy efficiency (EE) without sacrificing capacity. Specifically, we integrate FAS into cell-free massive MIMO systems to counteract low-resolution…

Information Theory · Computer Science 2026-05-28 Jun Qian , Ross Murch , Khaled B. Letaief

Powered by position-flexible antennas, the emerging fluid antenna system (FAS) technology is postulated as a key enabler for massive connectivity in 6G networks. The free movement of antenna elements enables the opportunistic minimization…

Signal Processing · Electrical Eng. & Systems 2024-07-24 Pablo Ramirez-Espinosa , David Morales-Jimenez , Kai-Kit Wong

Unmanned aerial vehicle (UAV)-enabled integrated sensing and communication (ISAC) is regarded as a key enabler for next-generation wireless systems. However, conventional fixed-position antennas limit the ability of UAVs to fully exploit…

Information Theory · Computer Science 2026-03-20 Wenchao Liu , Xuhui Zhang , Jinke Ren , Weijie Yuan , Changsheng You , Shuangyang Li

The current integrated sensing, communication, and computing (ISCC) systems face significant challenges in both efficiency and resource utilization. To tackle these issues, we propose a novel fluid antenna (FA)-enabled ISCC system,…

Information Theory · Computer Science 2024-09-19 Yiping Zuo , Jiajia Guo , Weicong Chen , Weibei Fan , Biyun Sheng , Fu Xiao , Shi Jin

This letter investigates a fluid antenna (FA)-assisted integrated sensing and communication (ISAC) system, with joint antenna position optimization and waveform design. We consider enhancing the sum-rate maximization (SRM) and sensing…

Information Theory · Computer Science 2024-12-12 Qian Zhang , Mingjie Shao , Tong Zhang , Gaojie Chen , Ju Liu , P. C. Ching

The concept of reconfigurable fluid antennas (FA) is a potential and promising solution to enhance the spectral efficiency of wireless communication networks. Despite their many advantages, FA-enabled communications have limitations as they…

Information Theory · Computer Science 2022-12-19 Christodoulos Skouroumounis , Ioannis Krikidis
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