XXXV Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

This article considers communication systems through visible light, VLC (Visible Light Communication). The optical sources used are light emitting diodes (LEDs). The objective of this work was to develop software for simulating the mathematical model of the channel based on recursive algorithms already proposed in the literature.

Radiofrequency (RF) Through-the-Wall Map- ping (TWM) employs techniques originally applied in Computer- ized Tomographic Imaging to reconstruct the floor blueprint and therefore map static obstacles behind walls. Most TWM scenarios assume a parallel-beam geometry, where two mobile sensors (one transmitter and one receiver) obtain the RF received...

Este artigo analisa, através de processamento de sinais, a interação entre densidade de fluxo magnético e um material submetido a diferentes condições de tratamento. O objetivo é estudar o ruído gerado dessa interação e correlacioná-lo com o grau de fragilização do material. Um aço inoxidável duplex SAF 2205 é utilizado. Os sinais são analisados através...

In this paper we present the robustness evaluation results for the link-shared protection algorithm. This analysis considers the protection rate and vulnerability rate metrics obtained by the simulation of three algorithms (shortest path, minimum number of hops e least resistance weight).

Este trabalho apresenta uma analise da não estacionariedade de sinais com variações acústicas produzidas pelos indivíduos quando submetidos a diferentes condições de estresse. O estudo investiga o índice de não estacionariedade (index of nonstationarity – INS) das condições de estresse Médio, Alto e Grito. A analise inclui os espectogramas e...

The concept of the internet of things (IoT) achieves through its applications more and more space in the technological, commercial and academic fields. One of the most obvious applications is the smart homes. Living in smart homes, or having systems turned to them, is already a reality for many people. This article presents a proof of concept of IoT...

Análise acústica tem sido empregada como ferramenta objetiva na avaliação da qualidade vocal. Neste trabalho, é avaliada a intensidade do desvio vocal, discriminando entre os graus normal, leve e moderado, através de medidas da análise dinâmica não linear (Primeiro Mínimo da Função de Informação Mútua e Dimensão de Correlação), medidas...

In this paper, the modulation technique ESIM- OFDM is analyzed considering a scenario with nonlinear distor- tions from PAs and AWGN channel. In particular, a theoretical expression for the BEP is presented for the scenario under consideration. The theoretical derivation is validated through computational simulations. Moreover, a performance...

This paper presents a performance analysis for a centralized solution to the Coordinated Beamforming Optimization Problem (CBOP), that uses an Alternating Direction Method of Multipliers (ADMM) approach in order to speed up calculations and to provide certificates of infeasibility. The ADMM algorithm is said to solve large-scale problems with modest...

In this work we propose an algorithm for noncontact heart rate estimation using conventional cameras. The algorithm is robust to movements and works under non-controlled illumination. We divide the frames in micro-regions that are tracked using an optical flow algorithm to compensate for movements and we apply a clustering algorithm to...