Method for spread spectrum communications

H - Electricity – 04 – L

Patent

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H04L 27/10 (2006.01) H04B 1/69 (2006.01) H04B 1/713 (2006.01)

Patent

CA 2195453

A method for secure radio pulse transmission through varying atmospheric condition which chooses different frequencies for transmitting a series of pulses of energy dependent upon the digital data content to be transmitted, provides for determining the frequency choices for a subsequent pulse transmission in response to digital data content of at least one previously transmitted pulse. Application includes h.f. band, data and fax, wireless communications.

L'invention porte sur un procédé permettant d'assurer la transmission sécurisée d'impulsions radio dans des conditions atmosphériques variables en choisissant des fréquences différentes pour la transmission d'une série d'impulsions d'énergie en fonction du contenu des données numériques à transmettre, et qui détermine les choix de fréquences de transmission de l'impulsion suivante en fonction du contenu des données numériques d'au moins l'une des impulsions préalablement transmises. Ce procédé s'applique aux transmissions en bande HF, à celle de données et de télécopie, ainsi qu'aux transmissions sans fils.

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