XLII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

This study presents the application of a method to detect unauthorized airstrips in the Brazilian Amazon using synthetic aperture radar (SAR) images from the Sentinel-1 satellite. There are illegal activities, such as mining and drug trafficking, which use these airstrips for their operations. Furthermore, the area is known for its dense vegetation. A...

The usage of ray-tracing techniques alongside 3D models of the real-world environment offer one of the most accurate forms of communication channel modeling. However, as a downside, the complexity of the 3D environment can significantly impact the time consumption of channel modeling simulations. We investigate the trade-off between 3D simplification...

The application of failure detection techniques in transparent optical networks is crucial to ensure the reliability of these networks and prevent data losses. Hence, this work compares the failure management performances of two unsupervised learning algorithms based on Principal Component Analysis (PCA): the linear PCA and the non-linear PCA (NLPCA)...

Propomos um método baseado em Mínimos Quadrados subamostrados para a estimação de parâmetros de espectros discretos compostos por harmônicas de uma única frequência fundamental, mais particularmente para o uso em medidores de qualidade de energia elétrica. A evolução das smart grids trouxe a necessidade do uso simultâneo de um maior número de tais...

The Sixth Generation of Mobile Networks (6G) is support Immersive Communication (IC) and Hyper Reli- able and Low-latency Communication (HRLLC). To accommodate heterogeneous services with contrasting requirements, Multi-Access Edge Computing (MEC), Network Function Virtualization (NFV), and Network Slicing (NS) are essential in 6G networks. Their...

Blockchain é uma tecnologia descentralizada que fornece segurança, transparência e validação de processos incomparáveis e está redefinindo o cenário operacional em vários setores. Este artigo se concentra no desenvolvimento de um método inova- dor de marketplace de telecomunicações baseado em blockchain, para oferecer um catálogo diversificado de...

Hemoglobin electrophoresis is one of the main tools for diagnosing hemoglobinopathies and thalassemias. However, a challenge faced by researchers and students is the lack of availability of images from these exams in open databases. Therefore, this work presents a simulator developed in GNU Octave for synthesizing realistic images of hemoglobin...

Power control has been used to deal with co-channel interference and energy efficiency in mobile communication systems. This work compares different power control schemes implemented in a cell-free (CF) system simulation. The approaches used are stepwise removal algorithm (SRA), fractional power control (FPC) and max power (MP). The...

Physical Layer Security (PLS) is an emerging concept in the field of secrecy for wireless communications that can be used alongside cryptography to prevent unauthorized devices from eavesdropping a legitimate transmission. It offers low computational cost and overhead by injecting an interfering signal in the wiretap channels of potential eavesdroppers....

Neste artigo, examinamos e comparamos dois sistemas diferentes para detecção de vagas de estacionamento. Um usa sensores ultrassônicos HC-SR04 e o outro usa visão computacional. Para fornecer uma visão completa das soluções de gestão de estacionamentos, examinemos as características, funcionalidade e benefícios de cada método