XXXV Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

Neste artigo, novas famílias de códigos convolucionais são construídas a partir de códigos algébrico-geométricos (AG). Os códigos convolucionais construídos são novos no sentido que seus parâmetros são diferentes dos parâmetros dos códigos disponíveis na literatura. Em particular, uma família de códigos almost near MDS ou near MDS ou MDS ´e apresentada.

—Este artigo apresenta um modelo estocástico do algoritmo NSVR-IAF-PNLMS (normalized smoothed variation rate individual-activation-factor proportionate normalized leastmean-square) para sinais de entrada gaussianos reais. Considerando uma matriz de distribuição de ganho variante no tempo, são derivadas aqui expressões de modelo caracterizando...

This work is a study of a technique of Blind Source Separation called Independent Component Analysis (ICA). Some of the most important ICA methods will be presented: maximization of kurtosis, negentropy and likelihood and minimization of mutual information. These methods will be implemented and validated for synthetic signals within the software...

A model of ultra wide band in millimeter wave propagation in urban environments is presented, deterministically considering scattering and depolarization caused by buildings, trees and poles.

In this article we study relay selection and resource allocation in a cooperative network that employs SC-FDMA (Sin- gle Carrier - Frequency Division Multiple Access) in the uplink direction such as in LTE (Long Term Evolution) system. With SC- FDMA, the frequency resources assigned to a transmitter should be adjacent in the frequency domain...

Recently, score-informed non-negative matrix factorization (SI-NMF) has been used for separation of sounds of musical instruments. Considering this application, we compare in this paper the SI-NMF method with two blind source separation algorithms based on independent component analysis (ICA): infomax (information-maximization) and JADE (joint...

Este artigo apresenta uma aplicação do modelo NovaGenesis de Internet do Futuro em uma Rede Colaborativa de dispositivos IoT. Os dispositivos e o núcleo da rede NovaGenesis foram emulados para permitir a coleta de mensagens. Analisando as mensagens obtivemos uma visão de como é construída uma rede de dispositivos IoT onde um nó pode ajudar um outro nó a...

Efficient anomaly detection in surveillance videos across diverse environments represents a major challenge in Computer Vision. This paper proposes a background subtraction approach based on the recent deep learning framework of residual neural networks that is capable of detecting multiple objects of different sizes by pixel-wise foreground...

This article presents how the interference of man-made noises through the present of harmonics, deteriorates the performance of Through-The-Earth Communications. In addition, the authors compare estimation and filtering techniques for harmonic attenuation considering the case that they are at their nominal frequency and a more realistic case where there...

This paper presents an open-source character-based end-to-end speech recognition system for Brazilian Portuguese (PT-BR). The first step of the work was the development of a PT-BR dataset—an ensemble of 4 previous datasets (of which 3 publicly available). The model trained on this dataset is a bidirectional long short-term memory network using...