Radio information and communication system using...

H - Electricity – 04 – J

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H04J 13/00 (2006.01) H04B 1/69 (2006.01) H04B 1/713 (2006.01) H04L 1/00 (2006.01) H04L 5/02 (2006.01) H04L 12/28 (2006.01) H04L 27/26 (2006.01) H04Q 7/30 (2006.01)

Patent

CA 2116219

In a radio information communication system of this invention, at least part of a transmission data string is first divided into a plurality of bit strings when data is transmitted by radio in a radio station on the transmission side and a plurality of carrier waves of different frequencies are subjected to primary modulation by the divided bit strings. Then, the primary-modulated carrier waves are subjected to secondary modulation by the spread spectrum system such as the frequency hopping system or chirp system and modulated waves obtained by the secondary modulation are transmitted.

Dans le système de radiocommunication de l'invention, une partie au moins d'une chaîne de données émise est divisée en une pluralité de chaînes binaires quand ces données sont émises par radio dans une station radio et une pluralité d'ondes porteuses de fréquences différentes est soumise à une modulation primaire effectuée par les chaînes binaires résultant de cette division. Les porteuses à modulation primaire sont ensuite soumises à une modulation secondaire par le système de communication à étalement du spectre, lequel peut être un système à saut de fréquence ou un système à modulation linéaire de fréquence, et les ondes résultant de la seconde modulation sont émises.

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