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Sociedade Brasileira de Telecomunicações

2012 - XXX Simpósio Brasileiro de Telecomunicações



Improving the Performance of Adaptive Modulation Systems by the Modulation Diversity Technique

This paper proposes a combination of the adap- tive modulation with the modulation diversity technique, which associates a suitable constellation rotation an...

SBrT 2012


Probabilidade de Erro de Bit em Sistemas de Comunicação Digital na Presença de Ruı́do Impulsivo Gaussiano Gatilhado

This article presents a mathematical analysis of some models for the AWGN impulsive noise. The two main classes are the gated AWGN (GAWGN) and the gated ga...

SBrT 2012


Probabilidade de Erro Sı́mbolo com Esquema θ -QAM sob Desvanecimento Nakagami- m Correlacionado

This paper presents an evaluation of the sym- bol error probability-SEP of θ-QAM scheme under correlated Nakagami-m fading with MRC receiver using Gaussian...

SBrT 2012


Stochastic Analysis of the Orthogonal Frequency Division Multiplexing Scheme

The Orthogonal Frequency Division Multiplexing (OFDM) scheme has been chosen as the transmission scheme for most digital television, digital radio and wire...

SBrT 2012


Técnica de decodificação híbrida iterativa para códigos LDPC

A hybrid decoding system for LDPC codes em- ploying min-sum belief propagation (BP) decoding to correct errors, combined with erasure iterative decoding, is ...

SBrT 2012