17 citations · 47 across the 52 of their papers we have counts for
54 papers
Covert Communications over Enormous Fluid Antenna Systems (E-FAS): Impact of Channel Hardening on Detection
Farshad Rostami Ghadi, Damoon Shahbaztabar, Kai-Kit Wong +1
Enormous fluid antenna systems (E-FAS) enable guided surface wave (SW) propagation and induce an end-to-end channel that is conditionally complex Gaussian with a random covariance…
Performance Limits of FRIS Systems in Nakagami- Fading
Masoud Khazaee, Felipe A. P. de Figueiredo, Rausley A. A. de Souza +4
Fluid reconfigurable intelligent surfaces (FRIS) have recently emerged as a promising technology for enhancing wireless link reliability through spatial decorrelation. However, the…
Enormous Fluid Antenna Systems (E-FAS) for Wireless Sensing: Channel Modeling and Conditional Estimation Limits
Farshad Rostami Ghadi, Kai-Kit Wong, Jose D. Vega-Sanchez +2
In this paper, we develop a fundamental analytical framework for integrated sensing and communications (ISAC) enabled by the Enormous Fluid Antenna System (E-FAS), which transforms…
Copula-Induced Correntropy for Robust Conjugate Gradient Learning
Farshad Rostami Ghadi, F. Javier Lopez-Martinez, David Morales-Jimenez +2
Robust learning in the presence of non-Gaussian and statistically dependent noise remains a fundamental challenge in signal processing and adaptive systems. Although information-th…
Exact Statistical Characterization and Performance Analysis of Fluid Reconfigurable Intelligent Surfaces
Masoud Khazaee, Felipe A. P. de Figueiredo, Rausley A. A. de Souza +4
Fluid reconfigurable intelligent surfaces (FRIS) extend conventional RIS architectures by enabling physical reconfiguration of element positions, thereby introducing a fundamentall…
Reinforcing Structured Chain-of-Thought for Video Understanding
Peiyao Wang, Haotian Xu, Noranart Vesdapunt +6
Multi-modal Large Language Models (MLLMs) show promise in video understanding. However, their reasoning often suffers from thinking drift and weak temporal comprehension, even when…
Enormous Fluid Antenna Systems (E-FAS): Channel Estimation
Farshad Rostami Ghadi, Kai-Kit Wong, Masoud Kaveh +4
Enormous fluid antenna systems (E-FAS) have recently emerged as a new wireless architecture in which intelligent metasurfaces act as guided electromagnetic interfaces, enabling sur…
Continuous Fluid Antenna Sampling for Channel Estimation in Cell-Free Massive MIMO
Masoud Kaveh, Farshad Rostami Ghadi, Francisco Hernando-Gallego +3
In this letter, we develop a continuous fluid antenna (FA) framework for uplink channel estimation in cell-free massive multiple-input and multiple-output (CF-mMIMO) systems. By mo…
Enormous Fluid Antenna Systems (E-FAS) for Multiuser MIMO: Channel Modeling and Analysis
Farshad Rostami Ghadi, Kai-Kit Wong, Masoud Kaveh +3
Enormous fluid antenna systems (E-FAS), the system concept that utilizes position reconfigurability in the large scale, have emerged as a new architectural paradigm where intellige…
Information-Theoretic Limits of Fluid Antenna-Aided ISAC with Representation Information Constraints
Farshad Rostami Ghadi, Kai-Kit Wong, F. Javier Lopez-Martinez +3
This paper characterizes the fundamental limits of integrated sensing and communication (ISAC) when the transmitter is subject to a representation-constrained encoder modeled via a…
Fluid Antenna-Enabled Backscatter Communication under Imperfect Channel Observations
Masoud Kaveh, Farshad Rostami Ghadi, Riku Jantti +2
Ambient backscatter communication (AmBC) enables ultra-low-power connectivity by allowing passive backscatter devices (BDs) to convey information through reflection of ambient sign…
Fundamental Tradeoffs for ISAC Multiple Access in Finite-Blocklength Regime
Zhentian Zhang, Christos Masouros, Kai-Kit Wong +5
This paper investigates the fundamental communication--sensing tradeoffs of uplink dual-functional integrated sensing and communication (ISAC) multiple access under finite blocklen…
Information-Theoretic Limits of Integrated Sensing and Communication with Finite Learning Capacity
Farshad Rostami Ghadi, F. Javier Lopez-Martinez, Kai-Kit Wong +1
This paper develops a unified information-theoretic framework for artificial-intelligence (AI)-aided integrated sensing and communication (ISAC), where a learning component with li…
Performance Analysis of Fluid Reconfigurable Intelligent Surface over Covert Communications
Farshad Rostami Ghadi, Masoud Kaveh, Hanjiang Hong +3
This paper investigates the impact of the recently proposed concept of fluid reconfigurable intelligent surfaces (FRIS) on covert communications. Specifically, we consider a commun…
Secret-key-based physical layer security for feedback-aided unsourced random access
Mohammad Javad Ahmadi, Rafael F. Schaefer, F. Rostami Ghadi +1
This work introduces security for unsourced random access (URA) via a physical-layer security approach. To achieve confidentiality, the proposed system opportunistically exploits i…
Multi-Port Selection for FAMA: Massive Connectivity with Fewer RF Chains than Users
Hanjiang Hong, Kai-Kit Wong, Xusheng Zhu +4
Fluid antenna multiple access (FAMA) is an emerging technology in massive access designed to meet the demands of future wireless communication networks by naturally mitigating mult…
On the Fundamental Scaling Laws of Fluid Antenna Systems
Xusheng Zhu, Farshad Rostami Ghadi, Tuo Wu +3
Fluid antenna systems (FAS) offer a promising paradigm for enhancing wireless communication by exploiting spatial diversity, yet a rigorous analytical framework for their error pro…
Coverage Region Analysis and Optimization of FIRES-Assisted NOMA and OMA Systems
Farshad Rostami Ghadi, Kai-Kit Wong, Masoud Kaveh +3
Fluid integrated reflecting and emitting surfaces (FIRES) are investigated. In these metasurfaces, each subarea hosts an active element capable of simultaneous transmission and ref…
Ambient Backscatter Communication Assisted by Fluid Reconfigurable Intelligent Surfaces
Masoud Kaveh, Farshad Rostami Ghadi, Riku Jantti +2
This paper investigates the integration of a fluid reconfigurable intelligent surface (FRIS) into ambient backscatter communication (AmBC) systems. Unlike conventional reconfigurab…
From Fixed to Fluid: Unlocking the New Potential with Fluid RIS (FRIS)
Han Xiao, Xiaoyan Hu, Kai-Kit Wong +5
Owing to its flexible and intelligent electromagnetic signal manipulation, the technology of reconfigurable intelligent surfaces (RISs) has attracted widespread attention. However,…
A Contemporary Survey on Fluid Antenna Systems: Fundamentals and Networking Perspectives
Hanjiang Hong, Kai-Kit Wong, Hao Xu +8
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,…
Performance Analysis of Wireless Communication Systems Assisted by Fluid Reconfigurable Intelligent Surfaces
Farshad Rostami Ghadi, Kai-Kit Wong, F. Javier Lopez-Martinez +2
This letter investigates the performance of emerging wireless communication systems assisted by a fluid reconfigurable intelligent surface (FRIS). Unlike conventional reconfigurabl…
FIRES: Fluid Integrated Reflecting and Emitting Surfaces
Farshad Rostami Ghadi, Kai-Kit Wong, Masoud Kaveh +3
This letter introduces the concept of fluid integrated reflecting and emitting surface (FIRES), which constitutes a new paradigm seamlessly integrating the flexibility of fluid-ant…
Phase-mismatched STAR-RIS with FAS-assisted RSMA Users
Farshad Rostami Ghadi, Kai-Kit Wong, Masoud Kaveh +4
This paper considers communication between a base station (BS) to two users, each from one side of a simultaneously transmitting-reflecting reconfigurable intelligent surface (STAR…