185 citations · 976 across the 69 of their papers we have counts for
77 papers
Channel Estimation and Reconstruction in Fluid Antenna Multiple Access: Myths, Misconceptions and Critical Questions
Taissir Y. Elganimi, Pablo Ramírez-Espinosa, David Morales-Jiménez +1
Fluid antenna systems (FAS) represent a paradigm shift in which antenna elements (ports) emulate the illusion of motion or fluidity within a spatial aperture to optimize performanc…
Hybrid Multiport Receivers for Slow Fluid Antenna Multiple Access
José P. González-Coma, José David Vega-Sánchez, F. Javier López-Martínez
We propose a novel receiver architecture that preserves the performance benefits of multiport selection in fluid-antenna systems while requiring only a very small number of radio-f…
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…
Greedy and Transformer-Based Multi-Port Selection for Slow Fluid Antenna Multiple Access
Darian Perez-Adan, Jose P. Gonzalez-Coma, F. Javier Lopez-Martinez +1
We address the port-selection problem in fluid antenna multiple access (FAMA) systems with multi-port fluid antenna (FA) receivers. Existing methods either achieve near-optimal spe…
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…
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…
Understanding the Role of Phase and Position Design in Fluid Reconfigurable Intelligent Surfaces
J. D. Vega-Sánchez, V. H. Garzón Pacheco, N. V. Orozco Garzón +2
Fluid Reconfigurable Intelligent Surfaces (FRISs) are gaining momentum as an improved alternative over classical RIS. However, it remains unclear whether their performance gains ca…
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…
Improved SINR Approximation for Downlink RSMA-based Networks with Outdated Channel State Information
Maria Cecilia Fernández Montefiore, Gustavo González, F. Javier López-Martínez +1
Understanding the performance of multi-user multiple-input multiple-output (MU-MIMO) systems under imperfect channel state information at the transmitter (CSIT) remains a critical…
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…
On Performance of FAS-aided Covert Communications
Farshad Rostami Ghadi, Masoud Kaveh, Riku Jantti +1
This paper investigates the impact of deploying the fluid antenna system (FAS) on the performance of covert communications. In particular, we focus on a scenario where a transmitte…
User Selection in Near-Field Gigantic MIMO Systems with Modular Arrays
José P. González-Coma, Santiago Fernández, F. Javier López-Martínez
Modular Arrays (MAs) are a promising architecture to enable multi-user communications in next-generation multiple-input multiple-output (MIMO) systems based on extra-large (XL) or…
How Should One Fit Channel Measurements to Fading Distributions for Performance Analysis?
Santiago Fernández, José David Vega-Sánchez, Juan E. Galeote-Cazorla +1
Accurate channel modeling plays a pivotal role in optimizing communication systems, and fitting field measurements to stochastic models is crucial for capturing the key propagation…
Fluid Antenna-Aided Rate-Splitting Multiple Access
Farshad Rostami Ghadi, Kai-Kit Wong, F. Javier Lopez-Martinez +2
This letter considers a fluid antenna system (FAS)-aided rate-splitting multiple access (RSMA) approach for downlink transmission. In particular, a base station (BS) equipped with…
Fluid Antenna Multiple Access with Simultaneous Non-unique Decoding in Strong Interference Channel
Farshad Rostami Ghadi, Kai-Kit Wong, Masoud Kaveh +4
Fluid antenna system (FAS) is gaining attention as an innovative technology for boosting diversity and multiplexing gains. As a key innovation, it presents the possibility to overc…
Reliable and Secure Communications Through Compact Ultra-Massive Antenna Arrays
José David Vega-Sánchez, Henry Ramiro Carvajal Mora, Nathaly Verónica Orozco Garzón +1
Compact Ultramassive Antenna Array (CUMA) is a pioneering paradigm that leverages the flexibility of the Fluid Antenna System (FAS) to enable a simple multiple access scheme for ma…
Secrecy Performance Analysis of RIS-Aided Fluid Antenna Systems
Farshad Rostami Ghadi, Kai-Kit Wong, Masoud Kaveh +3
This paper examines the impact of emerging fluid antenna systems (FAS) on reconfigurable intelligent surface (RIS)-aided secure communications. Specifically, we consider a classic…
Performance Analysis of FAS-Aided NOMA-ISAC: A Backscattering Scenario
Farshad Rostami Ghadi, Kai-Kit Wong, F. Javier Lopez-Martinez +2
This paper investigates a two-user downlink system for integrated sensing and communication (ISAC) in which the two users deploy a fluid antenna system (FAS) and adopt the nonortho…
Analytical Characterization of the Operational Diversity Order in Fading Channels
Santiago Fernández, J. Alfonso Bailón-Martínez, Juan E. Galeote-Cazorla +1
We introduce and characterize the operational diversity order (ODO) in fading channels, as a proxy to the classical notion of diversity order at any arbitrary operational signal-to…
Physical Layer Security over Fluid Antenna Systems: Secrecy Performance Analysis
Farshad Rostami Ghadi, Kai-Kit Wong, F. Javier Lopez-Martinez +3
This paper investigates the performance of physical layer security (PLS) in fluid antenna-aided communication systems under arbitrary correlated fading channels. In particular, it…