17 citations · 22 across the 6 of their papers we have counts for
16 papers · 1 filter
Deconstructing the Composite Channel for Beyond Diagonal RIS: Channel Estimation and Beamforming Design
Fazal-E Asim, André L. F. de Almeida, Bruno Sokal +2
As beyond-diagonal reconfigurable intelligent surfaces (BD-RISs) gain increasing attention in high-frequency wireless communications, accurate and scalable channel-estimation metho…
Joint Channel and Symbol Estimation for RIS-Assisted Fluid Antenna Systems
Josué V. de Araújo, Daniel C. Alcantara, Gilderlan T. de Araújo +1
This paper addresses joint channel and symbol estimation in reconfigurable intelligent surface (RIS)-aided multiuser uplink systems with fluid antennas (FAs) at the base station. W…
Channel Estimation for Movable Intelligent Surface
Daniel C. Alcantara, Josué V. de Araújo, Gilderlan T. de Araújo +1
This paper proposes a tensor-based channel estimation framework for an uplink MIMO system assisted by a movable intelligent surface. The considered architecture combines a fixed tr…
Channel Estimation for Flexible Intelligent Metasurface Aided MIMO Communications
Vinícius L. Romano, André L. F. de Almeida, Daniel C. Araújo
Flexible Intelligent Metasurfaces (FIMs) enable wireless systems to adapt their three-dimensional geometry through morphing, thereby providing new spatial degrees of freedom. Howev…
PARAFAC-Based Time-Varying Channel Estimation for IRS-Aided Communications
Kenneth B. A. Benício, André L. F. de Almeida, Bruno Sokal +3
This paper proposes a tensor-based parametric channel estimation technique for IRS-assisted communication systems with time-varying channel parameters. We exploit the multidimensio…
Channel Estimation for Beyond Diagonal RIS Exploiting Core Tensor Sparsity
Daniel Costa Araújo, André L. F. de Almeida
Beyond diagonal reconfigurable intelligent surfaces (BD-RISs) enhance wave manipulation through inter-element couplings but pose significant channel estimation challenges due to ca…