XXXVI Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

Todos os anos, milhares de pessoas são afetadas por doenças como dengue, chikungunya, zika e febre amarela. Todas essas doenças possuem um único vetor em comum, o mosquito Aedes aegypti, que se reproduz em água limpa e parada, usualmente acumulada em recipientes como pneus, garrafas, caixas d’água etc. O uso de ferramentas inteligentes pode...

This paper carries out an experiment-based channel characterization for a wireless sensor network based on the development kit TI eZ430-RF2500-SEH, which operates with solar energy harvesting. The channel model was obtained from measurements of the received signal strength (RSS) in an indoor environment. This model is tested through a coverage...

Em Redes Ópticas Elásticas, o problema de rote- amento e alocação de espectro (RSA – Routing and Spectrum Allocation) é comumente solucionado através do uso de técnicas de otimização ou heurísticas, com o intuito de minimizar o uso de recursos da rede ou maximizar a capacidade para atendimento de futuras requisições. Os efeitos da camada física no...

Este trabalho apresenta o estudo do comportamento do campo elétrico distribuído em 56 pontos de recepção dentro da região metropolitana de Belém, gerado por três emissoras de TV Digital: TV SBT Pará, TV Record e TV Liberal. Para isso, foram analisados os resultados da campanha de medições conduzida por pessoal técnico em uma unidade móvel...

PH level is a quality parameter used in several areas such as agriculture, chemistry and health. There are different ways to measure pH, including the use of indicator strips, whose chemical properties provide a change in the color of the paper depending on the acidity level of the substance in which it is immersed. This paper presents the...

This paper analyzes the transmission of digitally modulated signals using M-ary amplitude and quadrature modulation schemes (M-QAM), for channels subject to η−µ fading and Additive White Gaussian Noise (AWGN). New exact expressions to compute the Bit Error Probability (BEP) of the M-QAM scheme for Single Input and Single Output (SISO) systems,...

This paper presents an innovative approach that employs an ideal neighbourhood mask (INM) that has the ability to efficiently use Local Binary Pattern (LBP) to indicate which Time-Frequency units of the corrupted voice are dominated by noise. Experimental results obtained with a DNN based voice recogniser in noisy environments demonstrate that the...

In this paper, we propose an iterative algorithm for canceling, at the receiver, nonlinear (NLs) distortions inserted by PAs at source and relay in cooperative OFDM systems Amplifyand-Forward (AF). This algorithm presents in its structure blocks that that perform a pre-whitening of the received signals, combine them through the maximum ratio (MRC)...

This article presents a study on the classification of multiple emotional acoustic variations using the following features: vector of Hurst coefficients (pH), Mel-Frequency Cepstral Coefficients (MFCC) and Gammatone-Frequency Cepstral Coefficients (GFCC). For the analysis, two databases are used in English language, recorded in different contexts....

Development of quadrature hybrid based on low cost materials and fabrication techniques, using ADS and CST softwares, for operation in the UHF Digital TV frequency band in Brazil (470 MHz to 806MHz). The structure consists of superposition-coupled microstrips, plus extra end fitting to ensure better 50Ω matching. Models with different...