Non-data-aided channel estimators for multipath and multiple...

H - Electricity – 04 – B

Patent

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H04B 17/00 (2006.01) H04B 7/005 (2006.01) H04B 15/00 (2006.01) H04L 1/00 (2006.01) H04L 27/14 (2006.01)

Patent

CA 2644797

Novel non-data-aided maximum likelihood estimators for the delays and the attenuations in an ultra-wide bandwidth channel are proposed. Numerical results show that these new estimators outperform the previous non-data-aided maximum likelihood channel estimators derived in the literature. Moreover, in some cases, the performances of the new non-data-aided estimators approach those of the data-aided estimators, enabling us to reduce the overhead expense of pilot symbols.

On décrit de nouveaux estimateurs de vraisemblance maximale non assistés par des données, qui estiment les retards et les atténuations dans une voie à très grande largeur de bande. Des résultats chiffrés montrent que ces nouveaux estimateurs sont plus performants que les estimateurs de voie à vraisemblance maximale non assistés par des données classiques présentés dans la documentation. De plus, dans certains cas, les performances des nouveaux estimateurs non assistés par des données approchent celles des estimateurs assistés par des données, ce qui permet de réduire les coûts indirects en symboles pilotes.

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