A general method for low-frequency data transmission on a...

H - Electricity – 04 – B

Patent

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H04B 3/54 (2006.01)

Patent

CA 2735529

A method for producing a set of inbound pulse patterns and detection vectors for lengths longer than 4 cycles in an AC waveform. These are used for generating inbound messages in a two-way automatic communication system (TWACS). The method uses Hadamard matrices adapted to generate a set of detection vectors by permuting rows of a matrix and removing certain columns of the matrix to meet system design requirements. The method can be extended to any length and modified to accommo-date multiple pulses per half-cycle to support higher data rates.

L'invention porte sur un procédé de production d'un ensemble de motifs d'impulsions entrantes et de vecteurs de détection pour des longueurs supérieures à 4 cycles dans une forme d'onde CA, que l'on utilise pour créer des messages entrants dans un système automatique de communication bidirectionnelle (TWACS). Le procédé utilise des matrices de Hadamard conçues pour créer un ensemble de vecteurs de détection   en permutant les rangées de la matrice, et en en retirant certaines colonnes pour satisfaire aux exigences du système. Le procédé peut s'étendre à toute longueur et être modifié pour loger plusieurs impulsions par demi cycle afin d'accepter des débits de données plus élevés.

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