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The FEC limit paradigm is the prevalent practice for designing optical communication systems to attain a certain bit-error rate (BER) without forward error correction (FEC). This practice assumes that there is an FEC code that will reduce…

Information Theory · Computer Science 2024-01-25 Alex Alvarado , Erik Agrell , Domanic Lavery , Robert Maher , Polina Bayvel

This paper considers a Fluid Antenna (FA) system comprising a single-antenna transmitter that communicates with a receiver equipped with an FA array with $N$ ports. The transmitter is assumed to deploy any of the modulation schemes:…

Signal Processing · Electrical Eng. & Systems 2026-04-09 Soumya P. Dash , George C. Alexandropoulos

This paper provides a link and system level study of the downlink using OFDMA techniques based on LTE systems. At the link level, the Block Error Rate (BLER) performance curves are generated and 10 % points of BLER curves, calculated under…

Networking and Internet Architecture · Computer Science 2018-10-03 Ishtiaq Ahmad , Zeeshan Kaleem , KyungHi Chang

The synergy of fluid antenna systems (FAS) and reconfigurable intelligent surfaces (RIS) is poised to unlock robust Vehicle-to-Everything (V2X) communications. However, a critical gap persists between theoretical predictions and real-world…

Signal Processing · Electrical Eng. & Systems 2025-12-23 Tuo Wu , Xiazhi Lai , Maged Elkashlan , Naofal Al-Dhahir , Matthew C. Valenti , Fumiyuki Adachi

This work focuses on the performance of multi-terminal wireless industrial networks, where the transmissions of all terminals are required to be scheduled within a tight deadline. The transmissions thus share a fixed amount of resources,…

Information Theory · Computer Science 2016-06-29 Yulin Hu , Martin Serror , Klaus Wehrle , James Gross

With the expected proliferation of delay constrained applications, future communication technologies are pushed towards using short codes. The performance using short codes cannot be inferred through classical channel capacity analysis,…

Information Theory · Computer Science 2023-12-19 Nourhan Hesham , Hesham ElSawy , Jahangir Hossain , Anas Chaaban

With fluid antenna system (FAS) gradually establishing itself as a possible enabling technology for next generation wireless communications, channel estimation for FAS has become a pressing issue. Existing methodologies however face…

Signal Processing · Electrical Eng. & Systems 2025-07-09 Zhen Chen , Jianqing Li , Xiu Yin Zhang , Kai-Kit Wong , Chan-Byoung Chae , Yangyang Zhang

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

This paper presents a comprehensive physical layer security (PLS) framework for fluid antenna system (FAS)-aided short-packet communications under the variable block-correlation model (VBCM). We consider a downlink wiretap scenario in which…

Signal Processing · Electrical Eng. & Systems 2026-03-19 Jianchao Zheng , Tuo Wu , Kai-Kit Wong , Baiyang Liu , Runyu Pan , Maged Elkashlan , Kin-Fai Tong , Sumei Sun

In this paper, we investigate the problem of max-min rate maximization in fluid antenna relay (FAR)-assisted multi-user uplink multiple-input single-output (MISO) wireless systems, where each user is equipped with a single fluid antenna…

Signal Processing · Electrical Eng. & Systems 2025-07-02 Ruopeng Xu , Zhaohui Yang , Ting Zhang , Mingzhe Chen , Chen Zhu , Zhaoyang Zhang

This paper investigates the performance of wireless systems that employ finite-blocklength channel codes for transmission and operate under queueing constraints in the form of limitations on buffer overflow probabilities. A block fading…

Information Theory · Computer Science 2010-10-01 Deli Qiao , Mustafa Cenk Gursoy , Senem Velipasalar

In-band full-duplex (IBFD) systems are expected to double the spectral efficiency compared to half-duplex systems, provided that loopback self-interference (SI) can be effectively suppressed. The inherent interference mitigation…

Information Theory · Computer Science 2025-06-09 Hanjiang Hong , Kai-Kit Wong , Hao Xu , Yiyan Wu , Sai Xu , Chan-Byoung Chae , Baiyang Liu , Kin-Fai Tong

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

Unlike fixed-position arrays with static observation entropy, the scalable fluid antenna system (S-FAS) can dynamically adjust its aperture to form different observation spaces with configuration-dependent entropy budgets. This…

Signal Processing · Electrical Eng. & Systems 2026-04-02 Tuo Wu , Kai-Kit Wong , Jie Tang , Ye Tian , Baiyang Liu , Maged Elkashlan , Kin-Fai Tong , Hing Cheung So , Matthew C. Valenti , Fumiyuki Adachi , Kwai-Man Luk

Fluid antenna systems (FAS) enable unprecedented spatial diversity within a compact form factor by flexibly switching among high-density antenna ports. To activate this capability, channel state information (CSI) over the ports is required,…

Information Theory · Computer Science 2026-04-21 Zhentian Zhang , Hao Jiang , Kai-Kit Wong , Hyundong Shin , Ross Murch

In single-antenna fluid antenna systems (FASs), the transceiver dynamically selects the antenna port with the strongest instantaneous channel to enhance link reliability. However, deriving accurate yet tractable performance expressions…

Information Theory · Computer Science 2026-05-13 Rui Xu , Yinghui Ye , Xiaoli Chu , Guangyue Lu , Kai-Kit Wong , Chan-Byoung Chae

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

While multiple-input multiple-output (MIMO) technologies continue to advance, concerns arise as to how MIMO can remain scalable if more users are to be accommodated with an increasing number of antennas at the base station (BS) in the…

Signal Processing · Electrical Eng. & Systems 2026-02-03 Yuanjun Shen , Boyi Tang , Shuai Gao , Kin-Fai Tong , Hang Wong , Kai-Kit Wong , Yangyang Zhang

In this letter, we develop a unified Cram\'{e}r-Rao bound (CRB) framework to characterize the fundamental performance limits of transmission activity detection in fluid antenna systems (FASs) and conventional multiple fixed-position antenna…

Information Theory · Computer Science 2026-04-22 Zhentian Zhang , Kai-Kit Wong , Hao Jiang , Christos Masouros , Chan-Byoung Chae

Fluid antenna systems (FAS) allow dynamic reconfiguration to achieve superior diversity gains and reliability. To quantify the performance scaling of FAS with a large number of antenna ports, this paper leverages extreme value theory (EVT)…

Information Theory · Computer Science 2025-11-25 Yi Zhang , Jintao Wang , Zheng Shi , Xu Wang , Guanghua Yang , Shaodan Ma , Kai-Kit Wong
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