Filtragem otima na estimação de direção de chegada de ondas planas usando arranjo de sensores / Optimum filtering on direction of arrival estimation of plane waves using array of sensors

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

This work deals with the problem of estimating the direction of arrival (DOA) of plane waves using a uniform linear array of sensors. We are concerned with situations where the signal-to-noise ratio is low and the signal sources are spatially close. Our proposal is based on MODE, MODEX and Modified MODEX, that are efficient methods proposed in the literature. Inspired in concepts of linear filtering and in the maximum likelihood criterion, we propose a procedure that reduces the effect of noise in the estimation result. This procedure consists on filtering the received data and on modifying the likelihood function used to obtain the estimates. Numerical simulations show that the performance of the proposed method is better than those of MODE, MODEX and Modified MODEX methods, achieving lower mean square error and lower bias

ASSUNTO(S)

otimização matematica processamento de sinais discriminadores de frequencia signal processing digital filters (mathematics) direction of arrival estimation array of sensors filtros digitais (matematica)

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