Frequency domain filtering to improve channel estimation in...

H - Electricity – 04 – L

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H04L 27/26 (2006.01)

Patent

CA 2574796

A channel estimation system comprises a filtering component that selectively scales a plurality of carriers as a function of location of the plurality of carriers within a frequency band, wherein the plurality of carriers comprises at least one data carrier and at least one pilot carrier. A component thereafter extrapolates an observation from the at least one pilot carrier, wherein a channel is estimated as a function of the extrapolated observation. The scaling of the carriers facilitates reducing a flooring effect associated with channel estimation. The filtering component can be employed at a transmitter and/or at a receiver, and can be activated and/or deactivated as a function of a sensed data packet type.

Un système d'estimation de canal comprend un élément de filtrage qui évalue sélectivement une pluralité de porteuses en fonction de la localisation de ces porteuses dans une bande de fréquence, cette pluralité de porteuse comprenant au moins une porteuse de données et au moins une porteuse pilote. Ensuite, un élément extrapole une observation de cette ou de ces porteuses pilote, un canal étant estimé en fonction de l'observation extrapolée. L'évaluation de ces porteuses facilite la réduction des effets de bruit de fond associés à l'estimation de canal. L'élément de filtrage peut être utilisé au niveau d'un émetteur et/ou d'un récepteur et peut-être activer et/ou désactivé en fonction d'un type de paquets de donner détecter.

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