164 citations · 821 across the 83 of their papers we have counts for
47 papers · 1 filter
On the Spectral Efficiency of D-MIMO Networks under Rician Fading
Eduardo Noboro Tominaga, Onel Luis Alcaraz López, Tommy Svensson +2
Contemporary wireless communications systems adopt the Multi-User Multiple-Input Multiple-Output (MU-MIMO) technique: a single base station or Access Point (AP) equipped with multi…
On the Spectral Efficiency of Indoor Wireless Networks with a Rotary Uniform Linear Array
Eduardo Noboro Tominaga, Onel Luis Alcaraz López, Tommy Svensson +2
Contemporary wireless communication systems rely on Multi-User Multiple-Input Multiple-Output (MU-MIMO) techniques. In such systems, each Access Point (AP) is equipped with multipl…
Energy Efficiency Optimization for Subterranean LoRaWAN Using A Reinforcement Learning Approach: A Direct-to-Satellite Scenario
Kaiqiang Lin, Muhammad Asad Ullah, Hirley Alves +2
The integration of subterranean LoRaWAN and non-terrestrial networks (NTN) delivers substantial economic and societal benefits in remote agriculture and disaster rescue operations.…
Trade-Off Between Beamforming and Macro-Diversity Gains in Distributed mMIMO
Eduardo Noboro Tominaga, Hsuan-Jung Su, Jinfeng Du +3
Industry and academia have been working towards the evolution from Centralized massive Multiple-Input Multiple-Output (CmMIMO) to Distributed mMIMO (DmMIMO) architectures. Instead…
Meta-Learning Based Few Pilots Demodulation and Interference Cancellation For NOMA Uplink
Hebatalla Issa, Mohammad Shehab, Hirley Alves
Non-Orthogonal Multiple Access (NOMA) is at the heart of a paradigm shift towards non-orthogonal communication due to its potential to scale well in massive deployments. Neverthele…
On CSI-Free Multi-Antenna Schemes for Massive Wireless-Powered Underground Sensor Networks
Kaiqiang Lin, Onel Luis Alcaraz López, Hirley Alves +1
Radio-frequency wireless energy transfer (WET) is a promising technology to realize wireless-powered underground sensor networks (WPUSNs) and enable sustainable underground monitor…
Performance Analysis of Centralized and Distributed Massive MIMO for MTC
Eduardo Noboro Tominaga, Onel Luiz Alcaraz López, Hirley Alves +2
Massive Multiple-Input Multiple-Output (mMIMO) is one of the essential technologies introduced by the Fifth Generation (5G) of wireless communication systems. However, although mMI…
CSI-free Rotary Antenna Beamforming for Massive RF Wireless Energy Transfer
Onel L. A. López, Hirley Alves, Samuel Montejo-Sánchez +2
Radio frequency (RF) wireless energy transfer (WET) is a key technology that may allow seamlessly powering future massive low-energy Internet of Things (IoT) networks. To enable ef…
Effective Energy Efficiency of Ultra-reliable Low Latency Communication
Mohammad Shehab, Hirley Alves, Eduard A. Jorswieck +2
Effective Capacity defines the maximum communication rate subject to a specific delay constraint, while effective energy efficiency (EEE) indicates the ratio between effective capa…
LoRa Performance Analysis with Superposed Signal Decoding
J. M. de Souza Sant'Ana, A. Hoeller, R. D. Souza +2
This paper considers the use of successive interference cancellation (SIC) to decode superposed signals in Long Range (LoRa) networks. We build over a known stochastic geometry mod…
A Predictive Interference Management Algorithm for URLLC in Beyond 5G Networks
Nurul Huda Mahmood, Onel Alcaraz Lopez, Hirley Alves +1
Interference mitigation is a major design challenge in wireless systems,especially in the context of ultra-reliable low-latency communication (URLLC) services. Conventional average…
Ultra-low Latency, Low Energy and Massiveness in the 6G Era via Efficient CSIT-limited Schemes
Onel L. A. López, Nurul H. Mahmood, Hirley Alves +2
Channel state information (CSI) has been a key component in traditional wireless communication systems. This might no longer hold in future networks supporting services with string…
Traffic Prediction Based Fast Uplink Grant for Massive IoT
Mohammad Shehab, Alexander K. Hagelskjær, Anders E. Kalør +2
This paper presents a novel framework for traffic prediction of IoT devices activated by binary Markovian events. First, we consider a massive set of IoT devices whose activation e…
Enabling URLLC for Low-Cost IoT Devices via Diversity Combining Schemes
Onel L. Alcaraz López, Nurul Huda Mahmood, Hirley Alves
Supporting Ultra-Reliable Low-Latency Communication (URLLC) in the Internet of Things (IoT) era is challenging due to stringent constraints on latency and reliability combined with…
Ultra Reliable Communication via Optimum Power Allocation for HARQ Retransmission Schemes
Endrit Dosti, Mohammad Shehab, Hirley Alves +1
In this work, we develop low complexity, optimal power allocation algorithms that would allow ultra reliable operation at any outage probability target with minimum power consumpti…
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…
A Throughput and Energy Efficiency Scheme for Unlicensed Massive Machine Type Communications
Iran Ramezanipour, Hirley Alves, Pedro J. H. Nardelli +1
In this paper the throughput and energy efficiency of an unlicensed machine type communications network is studied. If an outage event happens in the network, there is a possibilit…
In-Band Pilot Overhead in Ultra-Reliable Low Latency Decode and Forward Relaying
Parisa Nouri, Hirley Alves, Richard Demo Souza +1
In URLLC the performance of short message communications highly depends on the training sequence length due to the stringent latency and reliability requirements. In this paper, we…
Performance of Non-orthogonal Multiple Access under Finite Blocklength
Endrit Dosit, Mohammad Shehab, Hirley Alves +1
In this paper, we present a finite-block-length comparison between the orthogonal multiple access (OMA) scheme and the non-orthogonal multiple access (NOMA) for the uplink channel.…
On the Statistics of the Ratio of Non-Constrained Arbitrary α-μ Random Variables: a General Framework and Applications
J. D. Vega Sánchez, D. P. Moya Osorio, E. E. Benitez Olivo +3
In this paper, we derive closed-form exact expressions for the main statistics of the ratio of squared alpha-mu random variables, which are of interest in many scenarios for future…
Statistical Analysis of Multiple Antenna Strategies for Wireless Energy Transfer
Onel L. Alcaraz López, Hirley Alves, Richard Demo Souza +1
Wireless Energy Transfer (WET) is emerging as a potential solution for powering small energy-efficient devices. We propose strategies that use multiple antennas at a power station,…
Performance Analysis of Ultra-Reliable Short Message Decode and Forward Relaying Protocols
Parisa Nouri, Hirley Alves, Matti Latva-aho
Machine-Type Communication (MTC) is a rapidly growing technology which covers a broad range of automated applications and propels the world into a fully connected society. Two new…
Statistical QoS provisioning for MTC Networks under Finite Blocklength
Mohammad Shehab, Endrit Dosti, Hirley Alves +1
This paper analyzes the effective capacity of delay constrained machine type communication (MTC) networks operating in the finite blocklength regime. First, we derive a closed-form…
Optimum Transmission Rate in Fading Channels with Markovian Sources and QoS Constraints
Fahad Qasmi, Mohammad Shehab, Hirley Alves +1
This paper evaluates the performance of reliability and latency in machine type communication networks, which composed of single transmitter and receiver in the presence of Rayleig…