32 citations · 52 across the 18 of their papers we have counts for
16 papers · 1 filter
Power from Space: Coordinated Satellite Charging for Off-Grid Wireless Systems
Osmel M. Rosabal, Amirhossein Azarbahram, Mateen Ashraf +4
Satellite-enabled wireless power transfer (WPT) may be a transformative solution for charging Internet of Things (IoT) devices in off-grid scenarios where traditional technologies…
Holographic Beamforming for Range-Doppler Sidelobe Suppression in OFDM-ISAC
Amirhossein Azarbahram, Onel L. A. López
This paper investigates range--Doppler (RD) sidelobe suppression in an integrated sensing and communications system with a reconfigurable holographic surface (RHS). We jointly desi…
Robust Near-Field Beam Focusing Under Imperfect Localization
Nima Mozaffarikhosravi, Amirhossein Azarbahram, Prathapasinghe Dharmawansa +1
The transition to 6G-and-beyond wireless systems with large-scale antenna arrays and high-frequency deployments significantly extends the near-field region, where channels exhibit…
Beam Selection for Delay-Doppler Visibility in Multi-Target MIMO-OFDM Sensing
Amirhossein Azarbahram, Onel L. A. López
This paper studies leakage-aware beam selection for multi-target multiple-input multiple-output (MIMO)-orthogonal frequency-division multiplexing (OFDM) sensing. We focus on ensuri…
Discrete Diffusion for Codebook-Based Beam Candidate Generation
Amirhossein Azarbahram, Onel L. A. López
Millimeter-wave (mmWave) communication enables high data rates through large bandwidths and highly directional beamforming, but its sensitivity to blockage and mobility makes relia…
Echo-Conditioned Denoising Diffusion Probabilistic Models for Multi-Target Tracking in RF Sensing
Amirhossein Azarbahram, Onel L. A. López
In this paper, we consider a dynamic radio frequency sensing system aiming to spatially track multiple targets over time. We develop a conditional denoising diffusion probabilistic…
On the Deployment of Multiple Radio Stripes for Large-Scale Near-Field RF Wireless Power Transfer
Amirhossein Azarbahram, Onel L. A. López, Petar Popovski +1
This paper investigates the deployment of radio stripe systems for indoor radio-frequency (RF) wireless power transfer (WPT) in line-of-sight near-field scenarios. The focus is on…
Sense-then-Charge: Wireless Power Transfer to Unresponsive Devices with Unknown Location
Amirhossein Azarbahram, Onel L. A. López, Richard D. Souza +2
This paper explores a multi-antenna dual-functional radio frequency (RF) wireless power transfer (WPT) and radar system to charge multiple unresponsive devices. We formulate a beam…
Beamforming and Waveform Optimization for RF Wireless Power Transfer with Beyond Diagonal Reconfigurable Intelligent Surfaces
Amirhossein Azarbahram, Onel L. A. Lopez, Bruno Clerckx +2
Radio frequency (RF) wireless power transfer (WPT) is a promising technology to seamlessly charge low-power devices, but its low end-to-end power transfer efficiency remains a crit…
Beyond Diagonal Reconfigurable Intelligent Surfaces for Multi-Carrier RF Wireless Power Transfer
Amirhossein Azarbahram, Onel L. A. López, Bruno Clerckx +2
Radio frequency (RF) wireless power transfer (WPT) is promising for promoting sustainability in future wireless systems, but its low end-to-end power transfer efficiency is a criti…
End-to-End Waveform and Beamforming Optimization for RF Wireless Power Transfer
Abdul Basit Khattak, Onel L. A. López, Amirhossein Azarbahram +2
Radio frequency (RF) wireless power transfer (WPT) is a key technology for future low-power wireless systems. However, the inherently low end-to-end power transfer efficiency (PTE)…
Deep Reinforcement Learning for Multi-User RF Charging with Non-linear Energy Harvesters
Amirhossein Azarbahram, Onel L. A. López, Petar Popovski +2
Radio frequency (RF) wireless power transfer (WPT) is a promising technology for sustainable support of massive Internet of Things (IoT). However, RF-WPT systems are characterized…
Zero-energy Devices for 6G: Technical Enablers at a Glance
Onel López, Ritesh Kumar Singh, Dinh-Thuy Phan-Huy +13
Low-cost, resource-constrained, maintenance-free, and energy-harvesting (EH) Internet of Things (IoT) devices, referred to as zero-energy devices (ZEDs), are rapidly attracting att…
On the Radio Stripe Deployment for Indoor RF Wireless Power Transfer
Amirhossein Azarbahram, Onel L. A. Lopez, Petar Popovski +1
One of the primary goals of future wireless systems is to foster sustainability, for which, radio frequency (RF) wireless power transfer (WPT) is considered a key technology enable…
Energy Beamforming for RF Wireless Power Transfer with Dynamic Metasurface Antennas
Amirhossein Azarbahram, Onel L. A. Lopez, Richard D. Souza +2
Radio frequency (RF) wireless power transfer (WPT) is a promising technology for charging the Internet of Things. Practical RF-WPT systems usually require energy beamforming (EB),…
Waveform Optimization and Beam Focusing for Near-field Wireless Power Transfer with Dynamic Metasurface Antennas and Non-linear Energy Harvesters
Amirhossein Azarbahram, Onel L. A. López, Matti Latva-Aho
Radio frequency (RF) wireless power transfer (WPT) is a promising technology for future wireless systems. However, the low power transfer efficiency (PTE) is a critical challenge f…