XXXV Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

This work consists of the construction of a system that traces obstacles. For the detection of objects it is used an ultrasonic sensor with 3 mm of resolution. In addition, a step motor moves the system with the ultrasonic sensor whose data collected by it is visualized through a graphical interface. Matlab software is used for the plotting, so it...

Esse artigo de iniciação científica estende a proposta de um trabalho da Universidade de Brasília. Nele, foi desenvolvida uma aplicação distribuída capaz de medir parâmetros relacionados a qualidade de redes móveis celulares e armazenar em um banco de dados para analises e futuras consultas. Este, por sua vez, aproveita toda a infraestrutura física e...

O presente artigo apresenta um modelo de classificação nas etapas do processo de semirrefino do óleo de algodão por processamento de imagens. Foi obtido um sistema simples de análise eficiente, possibilitando sua utilização em chão fabril, auxiliando assim no processo quanto à assertividade no estado do semirrefino desejado e seu controle de...

This article consists of the construction of a system that signals, through leds, when there is some deviation of pre- established trajectory. For the definition of the trajectory, the coordinates are obtained through the GPS shield. In addition, these coordinates are saved to a memory card, and the Google Earth tool is used to analyze the route. A...

This paper proposes a set of techniques for peak reduction in a cooperative OFDM system with AF relay and nonlinear PAs. The set of techniques are based on the PTS technique and they use PAPR and CM as metrics for choosing the transmitted signal. Both metrics are used to measure the amount of distortion introduced by PAs, so that minimizing them...

In this paper, we propose a method based on generating matrices for constructing eigenvectors of the discrete Hartley transform (DHT). The obtained eigenvector sets are characterized and employed in the definition of a fractional DHT (DFrHT). A real-valued version of the DFrHT is then presented; since the number of free parameters of such a...

The present study demonstrates an automated methodology for image classification of three types of insulators in Medium Voltage Distribution Networks. This components are known colloquially as Pin, Polymeric and Saia Baiana Isolators. The classification process occurs through the use of digital image processing techniques (DPI) and computational...

In speech synthesis systems based on deep neural networks (DNN), training is usually conducted by using acoustic feature vectors extracted from the speech signal at a fixed frame rate. This paper presents some approaches to use pitch-sychronous acoustic features in speech synthesizers based on DNN, with the goal to improve synthetic speech...

This paper presents contributions to the A-SPADE algorithm, for the purpose of implementing a audio Declipper in FPGA. An approach that accelerates A-SPADE is proposed, originating the ATA-SPADE algorithm. Such an approach showed that ATA-SPADE is much faster than A-SPADE, showing equivalent performance. A clipping level estimation algorithm is...

This paper presents an use of Ant Colony Optimization (ACO) algorithm for detection of hemorrhagic stroke (CVA) in computed tomography (CT) brain images. ACO and classes of the algorithm k-means were used to segment hemorrhagic area of the images, and this detection was performed with minimal processing time. Thus, was possible to create a...