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Sociedade Brasileira de Telecomunicações


Algoritmos Genéticos Aplicados para Otimização dos Parâmetros de um Reconhecedor Automático de Fala

State-of-the-art automatic speech recognition (ASR) systems are comprised of complex decoders that have a large number of parameters that allow tuning for...

SBrT 2017


On the Effects of Decoupling and Matching Networks in Phase Array Radiation Patterns for Radar Applications

Phased array systems employ a set of properly cho- sen radiating elements, geometrically configured and strategically excited in order to render a specific...

SBrT 2017


Towards an end-to-end speech recognizer for Portuguese using deep neural networks

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 ...

SBrT 2017


Evaluation of Simplified Methodology for Obtaining mmWave MIMO Channels from Ray-Tracing Simulations

The use of higher frequencies and MIMO is important in many 5G use cases. However, the available channel models for millimeter waves (mmWaves) currently de...

SBrT 2018


Convivência entre Sistemas IMT-2020 e TVRO em Banda C

This work presents a study of coexistence between IMT 2020 systems (5th Generation mobile systems - 5G), using beamforming and sector antennas, and domestic ...

SBrT 2020