Dr. Evangelos Vlachos
Tenure-track Researcher · ATHENA RC
Dr. Evangelos Vlachos
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New Paper: A hardware architecture for reconfigurable intelligent surfaces with minimal active elements for explicit channel estimation
A novel hardware architecture for reconfigurable intelligent surfaces minimizes active elements while enabling explicit channel estimation, a crucial step towards programmable wireless environments.
May 1, 2020
1 min read
Paper
New Paper: Wideband channel tracking for millimeter wave massive MIMO systems with hybrid beamforming reception
A novel matrix-completion-based approach enables efficient wideband channel tracking in millimeter wave massive MIMO systems with hybrid beamforming reception, reducing training periods while maintaining accurate estimation.
May 1, 2020
1 min read
Paper
A Hardware Architecture For Reconfigurable Intelligent Surfaces with Minimal Active Elements for Explicit Channel Estimation
Intelligent surfaces comprising of cost effective, nearly pas- sive, and reconfigurable unit elements are lately gaining in- creasing …
PDF
DOI
Joint Localization and Channel Estimation for UAV-Assisted Millimeter Wave Communications
In this paper, we consider millimeter Wave (mmWave) communications between an Unmanned Aerial Ve- hicle (UA V) and a base station. By …
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DOI
Radio-frequency chain selection for energy and spectral efficiency maximization in hybrid beamforming under hardware imperfections
The next-generation wireless communications require reduced energy consumption, increased data rates and better signal coverage. The …
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DOI
Wideband Channel Tracking for Millimeter Wave Massive Mimo Systems with Hybrid Beamforming Reception
Millimeter Wave (mmWave) massive Multiple Input Multi- ple Output (MIMO) channel tracking is a challenging task with Hybrid analog and …
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DOI
New Paper: Dynamic RF chain selection for energy efficient and low complexity hybrid beamforming in millimeter wave MIMO systems
This paper introduces a novel dynamic RF chain selection framework that maximizes energy efficiency and minimizes complexity in millimeter wave MIMO systems through fractional programming and Dinkelbach method-based optimization.
Dec 1, 2019
1 min read
Paper
New Paper: Energy efficient ADC bit allocation and hybrid combining for millimeter wave MIMO systems
This research optimizes ADC bit allocation and hybrid combining in millimeter wave MIMO systems, achieving highly energy-efficient solutions through a novel decomposition approach.
Dec 1, 2019
1 min read
Paper
New Paper: Wideband MIMO channel estimation for hybrid beamforming millimeter wave systems via random spatial sampling
A novel random spatial sampling approach enables reliable wideband MIMO channel estimation in hybrid beamforming millimeter wave systems, overcoming hardware limitations and short coherence times.
Sep 1, 2019
1 min read
Paper
New Paper: Energy efficient transmission of 3D meshes over mmwave-based massive mimo systems
This research proposes an energy-efficient transmission scheme for 3D meshes over mmWave-based massive MIMO systems, achieving up to 30% reduction in power consumption while maintaining high QoE.
Jul 1, 2019
1 min read
Paper
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