Rake receiver for cdma wireless communications

H - Electricity – 04 – B

Patent

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Details

H04B 7/04 (2006.01) H04B 7/08 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2435385

An apparatus for performance improvement of a digital wireless receiver, having a plurality of signals, has processing circuit (304, 306) and a weight generation circuit (308, 310, 312, 314, 316, 318). The processing circuit provides a processed signal, wherein a plurality of weights is applied to a plurality of signals producing a plurality of weighted signals and the plurality of weighted signals are combined to provide the processed signal. In the weight generation circuit the plurality of weights are generated as a function of a conjugate of channel estimate of corresponding signal of the plurality of signals and a variance of the corresponding signal. A method implementing the present invention is also described.

L'invention concerne un appareil destiné à améliorer le rendement d'un récepteur sans fil numérique. Cet appareil comprend une pluralité de signaux, un circuit de traitement (304, 306) ainsi qu'un circuit générateur de pondération (308, 310, 312, 316, 318). Le circuit de traitement permet de produire un signal traité. Des pondérations sont appliquées à une pluralité de signaux, d'où l'obtention de plusieurs signaux pondérés, lesquels sont alors combinés de façon à constituer le signal traité. Le circuit générateur de pondération produit des pondérations en fonction d'un conjugué d'estimation de canal d'un signal correspondant de cette pluralité de signaux, et d'une variance de ce signal correspondant. L'invention concerne également un procédé de mise en oeuvre de la présente invention.

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