A5046814772- Advanced MIMO Systems Optimization
- Wireless Communication Security Techniques
- Age of Information Optimization
- Advanced Wireless Communication Technologies
- Advanced Wireless Network Optimization
- Antenna Design and Analysis
- Public Health in Brazil
- Wireless Networks and Protocols
- Bacillus and Francisella bacterial research
- Cooperative Communication and Network Coding
- Wireless Body Area Networks
- SARS-CoV-2 and COVID-19 Research
- Advanced biosensing and bioanalysis techniques
- Municipal Solid Waste Management
- Mobile Ad Hoc Networks
- Distributed Sensor Networks and Detection Algorithms
- Seismic Imaging and Inversion Techniques
- Advanced Optical Sensing Technologies
- Software-Defined Networks and 5G
- Advanced Memory and Neural Computing
- Caching and Content Delivery
- Water Quality Monitoring Technologies
- Energy Efficient Wireless Sensor Networks
- Recycled Aggregate Concrete Performance
- Advanced Optical Network Technologies
Virginia Tech
2021-2024
Petrobras (Brazil)
2022
Universidade Federal de Lavras
2021
Trinity College Dublin
2020-2021
MARE - Centro de Ciências do Mar e do Ambiente
2019
Universidade Federal de Minas Gerais
2018-2019
In this letter, we study an attack that leverages a reconfigurable intelligent surface (RIS) to induce harmful interference toward multiple users in massive multiple-input multiple-output (mMIMO) systems during the data transmission phase. We propose efficient and flexible weighted-sum projected gradient-based algorithm for attacker optimize RIS reflection coefficients without knowing legitimate user channels. Simulation results demonstrate our malicious outperforms baseline strategies while...
A key distinction between today's and future networks is the appetite for reliable communication to support emerging critical-communication services. In this paper, we study multi-operator connectivity as a form of redundancy design investigate its trade-offs. This approach motivated by 3GPP standardisation initiatives dual-connectivity similar techniques in industrial wired networks. We deploy risk awareness performance metric assess reliability: superquantile accounts periods shortfalls....
Dimensioning for ultra-reliable communication is challenging because it requires massive amounts of data to capture rare network conditions, which time-consuming, or even impractical, depending on the time takes collect data. This letter proposes an extreme value theory-based framework reduce demand while quantifying bandwidth needed meet ultra-reliability requirements. Our proposed approach shown use several orders magnitude less than what would be conventionally expected when tested in two...
Industry-led initiatives such as the Next G Alliance are currently considering how to dimension spectrum required support new classes of services envisioned beyond 5G. In particular, for ultra-reliable low-latency communication (URLLC) brings challenge stochastic wireless networks meet stringent reliability and latency requirements. Our analysis indicates that bandwidth needed URLLC goals can be on order gigahertz, what is available in today's mobile networks. Network densification ease...
Identifying and assessing the spectrum needs for ultra-reliable communication are key to enabling services in next generation of mobile networks. This article proposes a framework assess required support network-wide. Using meta distributions, we derive expressions that reveal simple relationship between reliability requirements. Broadly speaking, each "nine" (e.g., five-nines 99.999%) maps onto one order magnitude additional bandwidth. Numerical evaluations indicate bandwidth can be up...
The next generation of mobile networks will bring an appetite for reliable communication, which enables emerging critical-communication services. In this paper, we present network sharing between operators as a way to provide increased reliability while using the already existing infrastructure. Our results indicate that significantly improves performance during periods connectivity shortfalls, benefiting design networks. conclusions are drawn from real-world dataset signal quality...
In this letter, we study an attack that leverages a reconfigurable intelligent surface (RIS) to induce harmful interference toward multiple users in massive multiple-input multiple-output (mMIMO) systems during the data transmission phase. We propose efficient and flexible weighted-sum projected gradient-based algorithm for attacker optimize RIS reflection coefficients without knowing legitimate user channels. To counter such threat, two reception strategies. Simulation results demonstrate...
While the robustness of rate-splitting multiple access (RSMA) to imperfect channel state information (CSI) is well-documented, its susceptibility attacks launched with malicious reconfigurable intelligent surfaces (RISs) remains unexplored. This paper fills this gap by investigating three potential RIS-induced against RSMA in a multi-user multiple-input multiple-output (MIMO) network: random interference, aligned and mitigation attack. The interference attack employs RIS coefficients disrupt...
Objective: Accurate serum creatinine (SC) measurements are pivotal for effective glomerular filtration rate (GFR) estimation, which is essential addressing global public health challenges related to chronic kidney disease. External Quality Assessment Programs (EQAPs) play a crucial role in evaluating analytical capabilities, identifying inter- laboratory variations, and improving quality. This study assessed the performance of laboratories participating Brazilian EQAP creatinine, conducted...
Previous works suggest that the magnitude of spectrum needed to support ultra-reliable communication services can be far beyond today's norm (e.g., tens gigahertz bandwidth). Multi-operator network sharing, in which mobiles connect operators' base stations sharing arrangement, is an alternative way offset high demand for spectrum. This paper assesses needs multi-operator sharing. Using meta distributions, we obtain new closed-form expressions two scenarios. Our reveal relationship between...
Em redes sem fio operando em frequências abertas, temos problemas como interferência externa e concorrência pelo uso do espectro, que variam no tempo espaço. Além disso, há uma grande diversidade de aplicações rodando sobre fio, cada qual com diferentes requisitos. Por exemplo, voz real demandam baixa latência requerem vazão dados. outro lado, baseadas transferência arquivos possuem maior tolerância a alta porém vazão. Apesar os protocolos MAC não atendem ao dinamismo ambiente das atuais....
Increasing seismic resolution has been long pursued by the geophysical community, serving, among other applications, for more detailed interpretation of clinoforms, better inversion and quantitative interpretation. Sparse deconvolution methods play central role in this pursuit. However, although sparse have performed well single stack or acoustic tasks, their application multi-stack volumes consequent use elastic is still a challenging ongoing research topic. The challenge to obtain...
RIS is one of the significant technological advancements that will mark next-generation wireless. technology also opens up possibility new security threats, since reflection impinging signals can be used for malicious purposes. This article introduces basic concept a RIS-assisted attack re-uses legitimate signal towards objective. Specific attacks are identified from this base scenario, and cancellation selected evaluation as an inherently exploits capabilities. The key takeaway effective...
Industry-led initiatives such as the Next G Alliance (NGA) are currently considering how to dimension spectrum required support new classes of services envisioned beyond 5G. In particular, for URLLC brings challenge stochastic wireless networks meet stringent reliability and latency requirements. Our analysis indicates that bandwidth needed goals can be in order gigahertz, what is available today's mobile networks. Network densification ease those needs but requires deployment strategies...