XL Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

Os sistemas elétricos de potência vem passado por um processo de modernização conhecido como smart grids. Ele está associado à digitalização da rede elétrica e monitoramento em larga escala. E a tecnologia de internet das coisas promete ajudar neste processo. Neste artigo é proposto um middleware distribuído para as redes elétricas com foco em...

This article describes the assembly and characterization of a fiber optic laser device in a figure-of-eight (F8L) ring configuration using a semiconductor optical amplifier (SOA) as medium of gain. The assembled F8L device consists of a laser operating in the harmonic mode-locking. Longitudinal modes locking were obtained with a repetition rate of short...

O diagnóstico antecipado da Doença de Alzheimer (DA) permite retardar seu efeito degenerativo progressivo. Esse diagnóstico é desafiador devido à grande semelhança entre o cérebro de uma pessoa saudável com envelhecimento natural e o de uma pessoa em estágio muito inicial da doença. Este artigo propõe o HIGEIA-DA, um classificador multiclasse que tem o...

In this work, we performed a detailed study of first-neighbor type connections for ultra-dense next-generation low-Earth orbit (LEO) constellations. The link lengths and their corresponding free-space path losses (FSPLs) are quantified for both intraorbital and interorbital connections (the latter in two distinct topologies). Each of the inter-satellite...

The purpose of this paper is to evaluate WiFi performance of the ESP32 module in outdoor scenarios. This was done by measuring the received signal strength indicator (RSSI) at different point of a relatively open area, prone to possible sources of interference, in order to simulate a real-life usage situation. The results show that it is possible to use...

This work presents the design of a third-order band-pass interdigital filter with Butterworth response designed to operate in the ISM band from 57 to 66 GHz. The project adopted an aluminum oxide (alumina) substrate, copper microstrip transmission lines and a CPW interface. We performed electromagnetic analysis in Ansys EM using the Finite Element Method...

This work shows a method to classify mosquitoes infected with the Zika virus. We accomplish that by using spectroscopy and machine learning. Our model takes the light absorbance of wavelengths from 350 to 1000 nm as inputs. It employs a combination of Linear Discriminant Analysis (LDA) of the windowed version of the signal (to take advantage of...