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Sociedade Brasileira de Telecomunicações

2015 - XXXIII Simpósio Brasileiro de Telecomunicações



Comunicações em Minas Subterrâneas

This article presents an overview of underground mine communications, addressing issues like propagation and noise model, transmission modes (Through-The-Wir...

SBrT 2015


Medidas de Canal para Comunicação Óptica pelo Espaço Livre

O artigo apresenta e analisa medidas do desvanecimento do sinal óptico num enlace terrestre de comunicação óptica pelo espaço livre utilizando um sistema com...

SBrT 2015


Improving the performance of a non-intrusive metric of voice quality assessment considering IP network parameters

In a voice-over-IP (VoIP) communication there are different factors that degrade the voice signal quality, and these degradations need to be evaluated in...

SBrT 2015


On the Stability of Delay-Centric Multihomed Transmission

The use of multiple network interfaces for multi- media transmission can reduce packet delay by choosing the less congested end-to-end path for transmissi...

SBrT 2015


Lattices from maximal quaternion orders over totally real number fields

n this paper we propose a framework to construct space-time codes over lattices in dimensions 4n via ideals from maximal orders of a quaternion algebra who...

SBrT 2015