XXXIX Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

The Mobile Ad-Hoc Networks (MANETs) benefit applications in military scenarios, as they enable the monitoring of soldiers' vital signals in field operations. Intermittent communication and route volatility make data transmission in MANETs challenging. Frequent disconnections and consequent failures generate significant delays and message delivery errors....

In Brazil, there are around 10 million hard of hearing and deaf people. However, the majority of Brazilians are not fluent in the Brazilian Sign Language (Libras). Many members of the hearing impaired and deaf community have communication issues in everyday life situations. Technological solutions can aid in mitigating this problem. This work proposes a...

Massive MIMO systems have received a growing interest since the apogee of 5G and the perspective of 6G. Massive MIMO allows an efficient usage of spectral resources and provides higher data rates. When the number of antennas increases, the energy consumption and the hardware cost in the base station also increase. The high energy consumption and...

This paper proposes an adaptive impedance matching coupling circuit for power line communication (PLC) systems operating in the frequency band of 1.7 up to 50~MHz. The proposed PLC coupling circuit is designed based on an analog filter bank approach. The simulation results show that the proposed analog filter bank approach can provide low return loss and...

Neste trabalho é apresentado um símbolo no domínio de Fresnel que possibilita a utilização das técnicas de sincronização temporal e na frequência propostas por Schmidl & Cox em esquemas orthogonal chirp-division multiplexing. Nesse contexto, é demonstrado que um símbolo composto por duas metades idênticas no domínio de Fresnel possui duas metades...

This work presents a comparative analysis of methods for detecting COVID-19 infection in radiographic images. The images used, belonging to publicly available databases, were divided into three categories: 'normal', 'pneumonia' and 'covid'. For carrying out the experiments, based on the technique known as transfer of learning, eight pre-trained networks...

In this work, we demonstrate the prediction of co-deletion of chromosome 1p/19q in low-grade gliomas, as it represents a positive prognostic factor for chemotherapy treatment. From the analysis of magnetic resonance images, we use machine learning based on radiomics features extracted from the images using the PyRadiomics library. The classification was...

Hankel matrices arise in several applications of signal processing, such as tensor decompositions, biomedical signal processing, etc. In general, these techniques rely on digital signals that can be modeled as a linear combination of exponential polynomials. Hence, the Hankel matrix built from these signals presents full rank, equal to the number of...

Resumo-Este trabalho apresenta uma solução alternativa do conformador robusto WCO-BMVDR para aparelhos auditivos biauriculares. A metodologia proposta calcula o multiplicador de Lagrange de forma iterativa, mediante o método de Newton-Raphson, para obter a solução ótima. Simulações computacionais indicam a possibilidade de aumento da qualidade da fala em...

This paper focuses on the implementation a quantum-secure lattice-based cryptography as a key encapsulation mechanism for a smart meter device, which has hardware resource constraint. In this regard, the post-quantum cryptography scheme called FrodoKEM, a candidate to the NIST post-quantum standardization process, is implemented using a system-on-a-chip...