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Sociedade Brasileira de Telecomunicações

2017 - XXXV Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

Performance Evaluation of Multicarrier Systems Applied to Underwater Acoustic Communications

In underwater acoustic communications, orthogonal frequency-division multiplexing (OFDM) is an alternative to frequency-shift keying (FSK). The key advanta...

SBrT 2017

Estudo do Compromisso entre Eficiência Espectral e Justiça na Alocação de Recursos de Rádio

This work studies the trade-off between spectral ef- ficiency and fairness considering the alocation of radio resources in a multi-user system which consid...

SBrT 2017

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