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Maximum a posteriori fast fading channel estimation based exclusively on pilot symbols

ESTIMATION AU MAXIMUM A POSTERIORI D’UN CANAL AVEC EVANOUISSEMENTS RAPIDES BASÉE EXCLUSIVEMENT SUR DES SYMBOLES PILOTES

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Abstract

An innovations-based block-by-block maximum a posteriori fast fading channel estimation algorithm, based exclusively on the received samples of pilot symbols, is proposed. This algorithm enables the theoretical determination of the optimum positions of pilot symbols using the raw bit error rate criterion. Moreover, it can be reformulated simply using appropriate weighting of the projections of received pilot symbols samples on an extended orthonormal base. This base can be determined simply as a function of the statistical properties of the channel.

Résumé

On propose un algorithme ďestimation, bloc par bloc, ďun canal avec évanouissements rapides, basé sur ľinnovation et utilisant uniquement les échantillons reçus associés aux symboles pilotes. Cet algorithme permet de déterminer théoriquement les positions optimales des symboles pilotes dans le bloc en s’appuyant sur le critére du taux ďerreur binaire brut. De plus, il peut être reformulé simplement en utilisant une pondération appropriée des projections des échantillons reçus associés aux symboles pilotes sur une base orthonormale etendue. Cette base peut être déterminée simplement à partir des propriétés statistiques du canal.

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  1. Cite technologique des communications, SUPCOM, Route de Roued km 3.5, 2083, El Ghazala, Ariana, Tunisie

    Mohamed Siala

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Siala, M. Maximum a posteriori fast fading channel estimation based exclusively on pilot symbols. Ann. Télécommun. 56, 569–586 (2001). https://doi.org/10.1007/BF03008834

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