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We investigate whether equipping fluid-antenna (FA) receivers with multiple ($L>1$) radiofrequency (RF) chains can improve the performance of the slow fluid-antenna multiple access (FAMA) technique, which enables open-loop connectivity with…

Signal Processing · Electrical Eng. & Systems 2025-07-24 José P. González-Coma , F. Javier López-Martínez

Federated learning (FL) is an emerging machine learning paradigm with immense potential to support advanced services and applications in future industries. However, when deployed over wireless communication systems, FL suffers from…

Signal Processing · Electrical Eng. & Systems 2025-03-06 Sangjun Park , Hyowoon Seo

Multiple-input multiple-output (MIMO) technology has significantly impacted wireless communication, by providing extraordinary performance gains. However, a minimum inter-antenna space constraint in MIMO systems does not allow its…

Information Theory · Computer Science 2022-05-05 Priyadarshi Mukherjee , Constantinos Psomas , Ioannis Krikidis

This paper presents a novel framework for enhancing physical-layer security in integrated sensing and communication (ISAC) systems by leveraging the reconfigurability of fluid antenna systems (FAS). We propose a joint precoding and port…

Signal Processing · Electrical Eng. & Systems 2025-10-01 Abdelhamid Salem , Hao Xu , Kai-Kit Wong , Chan-Byoung Chae , Yangyang Zhang

The revolutionary convergence of fluid antenna systems (FAS) and reconfigurable intelligent surfaces (RIS) creates unprecedented opportunities for secure wireless communications, yet the practical implications of hardware impairments on…

Signal Processing · Electrical Eng. & Systems 2026-03-10 Tuo Wu , Jianchao Zheng , Xiazhi Lai , Maged Elkashlan , Hyundong Shin , Naofal Al-Dhahir

Fluid antennas, including those based on liquid, mechanical, and pixel-based technologies, are poised to significantly enhance next-generation wireless systems by adaptively optimizing their radiation characteristics. Many theoretical…

Signal Processing · Electrical Eng. & Systems 2025-10-17 Halvin Yang , Yizhe Zhao , Kai-Kit Wong , Hsiao-Hwa Chen , Chan-Byoung Chae

The Fluid Antenna System (FAS) overcomes the spatial degree-of-freedom limitations of conventional static antenna arrays in wireless communications.This capability critically depends on acquiring full Channel State Information across all…

Signal Processing · Electrical Eng. & Systems 2025-08-05 Xuehui Dong , Kai Wan , Shuangyang Li , Robert Caiming Qiu , Giuseppe Caire

With the emergence of Cloud-RAN as one of the dominant architectural solutions for next-generation mobile networks, the reliability and latency on the fronthaul (FH) segment become critical performance metrics for applications such as the…

Networking and Internet Architecture · Computer Science 2018-09-25 Ghizlane Mountaser , Toktam Mahmoodi , Osvaldo Simeone

The reconfigurability of fluid antenna systems (FASs) and reconfigurable intelligent surfaces (RISs) provides significant flexibility in optimizing channel conditions by jointly adjusting the positions of fluid antennas and the phase shifts…

Information Theory · Computer Science 2025-09-29 Xin Zhang , Dongfang Xu , Jingjing Wang , Shenghui Song , Derrick Wing Kwan Ng , Mérouane Debbah

As 6G evolves, wireless networks become essential for critical operations and enable innovative applications that demand seamless adaptation to dynamic environments and disruptions. Because these vital services require uninterrupted…

Signal Processing · Electrical Eng. & Systems 2025-06-30 Kevin Weinberger , Aydin Sezgin

This paper characterizes the fundamental limits of integrated sensing and communication (ISAC) when the transmitter is subject to an artificial intelligence (AI) representation bottleneck and the receiver employs a fluid antenna system…

With the emergence of fluid antenna (FA) in wireless communications, the capability to dynamically adjust port positions offers substantial benefits in spatial diversity and spectrum efficiency, which are particularly valuable for mobile…

Signal Processing · Electrical Eng. & Systems 2025-09-25 Ying Ju , Mingdong Li , Haoyu Wang , Lei Liu , Youyang Qu , Mianxiong Dong , Victor C. M. Leung , Chau Yuen

A novel scalable pixel-based reconfigurable beamforming network (PRBFN) that can be used to form a Fluid Antenna System (FAS), referred to as a PRBFN-FAS, is introduced. The concept of FAS has emerged as an attractive new technology for use…

Signal Processing · Electrical Eng. & Systems 2025-12-04 Jichen Zhang , Junhui Rao , Tianqu Kang , Zhaoyang Ming , Yijun Chen , Alikhan Umirbayev , Chi-Yuk Chiu , Ross Murch

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…

Signal Processing · Electrical Eng. & Systems 2026-01-12 Yuqi Ye , Li You , Hao Xu , Ahmed Elzanaty , Kai-Kit Wong , Xiqi Gao

Integrated data and energy transfer (IDET) is considered as a key enabler of 6G, as it can provide both wireless energy transfer (WET) and wireless data transfer (WDT) services towards low power devices. Thanks to the extra degree of…

Information Theory · Computer Science 2025-12-19 Long Zhang , Yizhe Zhao , Halvin Yang , Guangming Liang , Jie Hu

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

Fluid antenna systems encompass a broad class of reconfigurable antenna technologies that offer substantial spatial diversity for various optimization objectives and communication tasks. Their capability to enhance spatial resolution within…

Information Theory · Computer Science 2025-12-01 Jingyuan Xu , Zhentian Zhang , Jian Dang , Hao Jiang , Zaichen Zhang

As the number of real-time applications with ultra-low delay requirements quickly grows, massive ultra-reliable and low-latency communication (mURLLC) has been proposed to provide a wide range of delay-sensitive services for the sixth…

Information Theory · Computer Science 2024-07-18 Yixin Zhang , Wenchi Cheng , Wei Zhang

Fluid antenna is a new reconfigurable antenna technology that can dynamically adjust the positions or ports of radiating elements and therefore provides a new degree of freedom for wireless communications. However, the associated port…

Information Theory · Computer Science 2026-05-15 Gan Zheng , Fei Liu , Qingfu Zhang

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…