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Sociedade Brasileira de Telecomunicações


A Fingerprint-based Access Control using Principal Component Analysis and Edge Detection

This paper presents a novel approach for deciding on the appropriateness or not of an acquired fingerprint image into a given database. The process begins...

SBrT 2010


HMM Models and Estimation Algorithms for Real-Time Predictive Spectrum Sensing and Cognitive Usage

This work investigates the use of Non-Stationary Hidden Markov and Hidden Bivariate Markov Models through simulations and real-time application to predict R...

SBrT 2017


Simulador de Canais Ionosféricos em GNU Radio

Este artigo apresenta um simulador em tempo real de modelos usuais para canais ionosféricos na faixa de HF. O simulador foi desenvolvido utilizando o softw...

SBrT 2018


BER and PAPR Reduction Method for Nonlinearly Amplified OFDM Signals

This paper presents a new technique to improve the performance of OFDM systems with nonlinear amplifiers. This method aims to achieve good balances between...

SBrT 2017


Simple and Robust Method for OFDM Performance Improvement with Nonlinear Amplification

This work proposes a new technique to be used in orthogonal frequency division multiplexing (OFDM) systems subject to nonlinear power amplification, aiming t...

SBrT 2018