109 citations · 271 across the 25 of their papers we have counts for
27 papers
Adaptive Contention-based Random Access for Uplink Reporting in 3GPP Ambient IoT Networks
David E. Ruiz-Guirola, Samer Nasser, Bikramjit Singh +6
Ambient Internet of Things (A-IoT) targets energy harvesting (EH), battery-less devices as a simple connectivity solution for extensive ultra-low-power deployments. These devices t…
Sequential Monte Carlo for Resilient Networks: Assessment, Mitigation, and Generative Modeling
Onel L. A. López, Amirhossein Azarbahram
Resilience is becoming crucial for future wireless networks, which must withstand, adapt to, and recover from rare but potentially cascading disruptions. This paper develops a sequ…
Dependable Connectivity for Industrial Wireless Communication Networks
Nurul Huda Mahmood, Onel L. A. Lopez, David Ruiz-Guirola +3
Dependability - a system's ability to consistently provide reliable services by ensuring safety and maintainability in the face of internal or external disruptions - is a fundament…
MDP-based Energy-aware Task Scheduling for Battery-less IoT
Shahab Jahanbazi, Mateen Ashraf, Onel L. A. López
Battery-less Internet of Things (IoT) devices rely on ambient energy harvesting and therefore require scheduling policies that jointly account for energy intermittency and hard tim…
Wireless Energy Transfer Beamforming Optimization for Intelligent Transmitting Surface
Osmel Martínez Rosabal, Onel Alcaraz López, Victoria Dala Pegorara Souto +4
Radio frequency (RF) wireless energy transfer (WET) is a promising technology for powering the growing ecosystem of Internet of Things (IoT) using power beacons (PBs). Recent resea…
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)…
Cell Balancing for the Transportation Sector: Techniques, Challenges, and Future Research Directions
Anupama R Itagi, Rakhee Kallimani, Krishna Pai +2
Efficient and reliable energy systems are key to progress of society. High performance batteries are essential for widely used technologies like Electric Vehicles (EVs) and portabl…
EVT-enriched Radio Maps for URLLC
Dian Echevarría Pérez, Onel L. Alcaraz López, Hirley Alves
This paper introduces a sophisticated and adaptable framework combining extreme value theory with radio maps to spatially model extreme channel conditions accurately. Utilising exi…
High-Power and Safe RF Wireless Charging: Cautious Deployment and Operation
Onel L. A. López, Osmel M. Rosabal, Amirhossein Azarbahram +5
The wired charging and the need for battery replacements are critical barriers to unlimited, scalable, and sustainable mobile connectivity, motivating the interest in radio frequen…
Energy-Efficient Analog Beamforming for RF-WET with Charging Time Constraint
Osmel Martínez Rosabal, Onel L. Alcaraz López, Hirley Alves
Internet of Things (IoT) sustainability may hinge on radio frequency wireless energy transfer (RF-WET). However, energy-efficient charging strategies are still needed, motivating o…
Energy-Aware Federated Learning with Distributed User Sampling and Multichannel ALOHA
Rafael Valente da Silva, Onel L. Alcaraz López, Richard Demo Souza
Distributed learning on edge devices has attracted increased attention with the advent of federated learning (FL). Notably, edge devices often have limited battery and heterogeneou…
Extreme Value Theory-based Robust Minimum-Power Precoding for URLLC
Dian Echevarría Pérez, Onel L. Alcaraz López, Hirley Alves
Channel state information (CSI) is crucial for achieving ultra-reliable low-latency communication (URLLC) in wireless networks. The main associated problems are the CSI acquisition…
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…
Sustainable RF Wireless Energy Transfer for Massive IoT: enablers and challenges
Osmel Martínez Rosabal, Onel L. Alcaraz López, Hirley Alves +1
Reliable energy supply remains a crucial challenge in the Internet of Things (IoT). Although relying on batteries is cost-effective for a few devices, it is neither a scalable nor…
TinyML: Tools, Applications, Challenges, and Future Research Directions
Rakhee Kallimani, Krishna Pai, Prasoon Raghuwanshi +2
In recent years, Artificial Intelligence (AI) and Machine learning (ML) have gained significant interest from both, industry and academia. Notably, conventional ML techniques requi…
Fitting the Distribution of Linear Combinations of t-Variables with more than 2 Degrees of Freedom
Onel L. Alcaraz López, Evelio M. G. Fernández, Matti Latva-aho
The linear combination of Student's random variables (RVs) appears in many statistical applications. Unfortunately, the Student's distribution is not closed under convoluti…
Statistical Tools and Methodologies for Ultrareliable Low-Latency Communications -- A Tutorial
Onel López, Nurul Mahmood, Mohammad Shehab +4
Ultra-reliable low-latency communication (URLLC) constitutes a key service class of the fifth generation and beyond cellular networks. Notably, designing and supporting URLLC poses…
Polarization Diversity-enabled LOS/NLOS Identification via Carrier Phase Measurements
Onel L. A. López, Dileep Kumar, Antti Tölli
The provision of accurate localization is an increasingly important feature of wireless networks. To this end, a reliable distinction between line-of-sight (LOS) and non-LOS (NLOS)…
Latency-Aware Multi-antenna SWIPT System with Battery-Constrained Receivers
Dileep Kumar, Onel L. Alcaraz López, Satya Krishna Joshi +1
Power splitting (PS) based simultaneous wireless information and power transfer (SWIPT) is considered in a multi-user multiple-input-single-output broadcast scenario. Specifically,…
Self-energy recycling for low-power reliable networks: Half-duplex or Full-duplex?
Dian Echevarría Pérez, Onel L. Alcaraz López, Hirley Alves +1
Self-energy recycling (sER), which allows transmit energy re-utilization, has emerged as a viable option for improving the energy efficiency (EE) in low-power Internet of Things ne…
Massive Wireless Energy Transfer with Statistical CSI Beamforming
Francisco A. Monteiro, Onel L. A. López, Hirley Alves
Wireless energy transfer (WET) is a promising solution to enable massive machine-type communications (mMTC) with low-complexity and low-powered wireless devices. Given the energy r…
Massive MIMO with Radio Stripes for Indoor Wireless Energy Transfer
Onel L. A. López, Dileep Kumar, Richard Demo Souza +3
Radio frequency wireless energy transfer (WET) is a promising solution for powering autonomous Internet of Things (IoT) deployments. In this work, we leverage energy beamforming fo…
Rate Control for Wireless-Powered Communication Network with Reliability and Delay Constraints
Onel L. Alcaraz López, Hirley Alves, Richard Demo Souza +2
We consider a two-phase Wireless-Powered Communication Network under Nakagami-m fading, where a wireless energy transfer process first powers a sensor node that then uses such ener…
Optimum LoRaWAN Configuration Under Wi-SUN Interference
Arliones Hoeller-Jr., Richard Demo Souza, Hirley Alves +3
Smart Utility Networks (SUN) rely on the Wireless-SUN (Wi-SUN) specification for years. Recently practitioners and researchers have considered Low-Power Wide-Area Networks (LPWAN)…