Communication receiver with a rake-based adaptive equalizer

Details Communication receiver with a rake-based adaptive equalizer Communication receiver with a rake-based adaptive equalizer

H - Electricity

04

B

H04B 1/7115 (2011.01) H04W 24/00 (2009.01)

Patent

CA 2516114

A method for estimating a transmitted signal. A wireless signal is received that includes a pilot channel and at least one other channel. The wireless signal is processed using a rake receiver front end to provide a plurality of front end outputs. Channel estimation is performed on the plurality of front end outputs to obtain a plurality of channel estimates. The channel estimates are then used to combine the plurality of front end outputs into a combined signal. A transmitted signal is estimated using an equalizer and the combined signal. The equalizer includes a filter with a plurality of taps that are adapted through use of an adaptive algorithm that uses an estimated pilot estimated from the received wireless signal. The pilot channel is transmitted in the wireless signal that included the at least one other channel. The estimated pilot is extracted and provided to the adaptive algorithm.

L'invention concerne une méthode d'estimation d'un signal transmis. Un signal sans fil est reçu. Ce signal comprend un canal pilote et au moins un autre canal. Le signal sans fil est traité au moyen d'un logiciel frontal de récepteur Rake, pour fournir une pluralité de sorties frontales. Une estimation de canal est effectuée sur la pluralité de sorties frontales pour obtenir une pluralité d'estimations de canal. Ces estimations de canal sont ensuite utilisées pour combiner la pluralité de sorties frontales en un signal combiné. Un signal transmis est estimé au moyen d'un égaliseur et du signal combiné. L'égaliseur comprend un filtre présentant une pluralité d'entrées qui sont adaptées au moyen de l'utilisation d'un algorithme adaptatif faisant appel à un pilote estimé, à partir du signal sans fil reçu. Le canal pilote est transmis dans le signal sans fil comprenant au moins un autre canal. Le pilote estimé est extrait et envoyé à l'algorithme adaptatif.

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