Technique for cancelling signal dispersion in communications...

H - Electricity – 04 – L

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H04L 1/00 (2006.01) H04B 3/23 (2006.01) H04L 25/03 (2006.01) H04N 5/21 (2006.01)

Patent

CA 2090246

A signal dispersion cancellation structure receives incoming signal samples at an incoming rate, stores these samples in a first memory and then writes these samples at a submultiple of the incoming rate into a plurality of second memories. Each second memory is associated with a finite impulse response (FIR) filter and the second memory samples are coupled to the associated FIR filter at the incoming rate. Advantageously, apparatus is also provided which enables any sample in a second memory to be provided to the associated FIR filter and outputted therefrom at a time related to the position of any signal dispersion.

L'invention est une structure d'annulation de la dispersion dans les signaux qui reçoit des échantillons de signal à un débit initial donné, les stocke dans une première mémoire, puis les enregistre dans une pluralité de secondes mémoires à un débit égal à un sous-multiple du débit initial. Chacune de ces secondes mémoires est associée à un filtre à réponse impulsionnelle finie et leurs échantillons sont transmis à leurs filtres individuels au débit initial. La structure de l'invention comprend également un dispositif qui permet de transmettre au filtre à réponse impulsionnelle finie connexe un échantillon quelconque enregistré dans l'une des mémoires secondes et de transmettre le signal de sortie de ce filtre à un instant déterminé par la position de la dispersion dans le signal.

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