Uma Contribuicão a Estimação de Canais PLC Variantes no Tempo utilizando Sinais Pilotos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

In this dissertation is discussed and analyzed the performance of pilot-assisted channel estimation techniques for OFDM (Orthogonal Frequency Division Multiplexing) modulation that is applied to data transmission through PLC (power line communications) channels. The PLC channels are modeled as linear and time-invariant (LIT), linear and time variant (LTV), and linear and cyclic time-variant (LCTV) ones when the additive impulsive gaussian noise (AIGN) is considered. Performance analysis obtained with adaptive and nonadaptive channel estimation techniques together with channel equalization and pilot signal allocation ones are provided. The results based upon performance simulation offer interesting directions to improve pilot-assisted channel estimation techniques when the PLC channel are LIT, LTV or LCTV corrupted by AIGN

ASSUNTO(S)

alocação de sinais pilotos channel estimation ofdm ofdm estimação de canais pilot signal allocation powerline engenharia eletrica powerline

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