The reflection of an acoustic signal on walls or objects in an enclosed environment is perceived as reverbera- tion. It is present daily in conference room...

• F. de S. Farias
• R. Coelho

• The reflection of an acoustic signal on walls or objects in an enclosed environment is perceived as reverbera- tion. It is present daily in conference rooms
• tunnels and any closed spaces. The presence of reverberation can degrade speech intelligibility and the performance of tasks that depend on it
• such as speech or speaker recognition. Many methods were proposed to attenuate this degradation. A family of such methods acts on clean speech
• applying gains on parts of the signal in order to improve intelligible when reverberated. These methods are called adaptive gain methods. This study aims to evaluate the effect of two adaptive gain methods
• Adaptive Gain Control (AGC) and Steady-State Suppression (SSS)
• in speech intelligibility. The evaluation uses four objective measures: Coherence Signal Intelligibility Index (CSII)
• Short Time Objective Intelligibility (STOI)
• Speech Reverberation to Modulation Ratio (SRMR) and Weighted Short Time Objective Intelligibility (WSTOI). Results show that AGC improves speech intelligibility in studied conditions
• while SSS degrades it
• a result in line with subjective measures found in the literature.

SBrT 2018

O Strict Frequency Reuse (SFR) é uma técnica de coordenação de interferência (ICIC) que se propõe a diminuir os efeitos ICI (Inter-Cell Interference) em si...

• Iago D. do Rêgo
• Luciana F. de O. Nóbrega
• Vicente A. de Sousa Jr

• ICIC
• FFR
• ns-3
• LTE
• Strict Frequency Reuse
• 2k Fatorial
• Análise Fatorial Completa

SBrT 2018

A gestação é um perı́odo no qual o corpo e o sistema imunológico da mulher sofrem alterações progressivas, resultando em alterações hemodinâmicas caracterı...

• Carlos Danilo Miranga Regis
• Catarina Lenice Lopes Pedrosa
• Iasmin de França Albuquerque
• Michael Taynnan Barros
• Walisson da Silva Soares

• Comunicações Moleculares
• Gravidez
• He- modinâmicas
• Ganho
• Fluxo Sanguı́neo

SBrT 2018

Este trabalho tem por objetivo estabelecer a caracterização da cobertura de sinais de comunicação sem fio em ambientes internos na faixa de frequência em t...

• Maria do Carmo de L. M. Frazão
• Niedson A. Lemos
• Jefferson Costa e Silva
• Alfrêdo Gomes Neto
• Custódio José de Oliveira Peixeiro

• Ambientes Internos
• Predição de Cobertura
• Método do Traçado de Raios
• Medições

SBrT 2018

This article covers the potential of Filter Bank Multicarrier (FBMC) modulation to be used in the future 5G wireless networks where Massive Multiple-Input Mu...

• Felipe Kurpiel Jose
• Luis Lolis
• Eduardo Parente Ribeiro
• Felipe Alex Pinto

• Massive MIMO
• FBMC
• M-QAM modulation,spectral efficiency
• 5G

SBrT 2018