A system and method for communicating with plural remote...

G - Physics – 08 – G

Patent

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G08G 1/127 (2006.01) G08B 25/10 (2006.01) H04B 1/69 (2006.01) H04B 14/02 (2006.01)

Patent

CA 2332572

A system for communicating with plural remote transmitters in which the transmitters send messages without a common synchronization source or polling by a controlling receiver. In one embodiment, the system uses the time position of frequency chirp signals to encode the identity and/or other information sent from the receiver. The system may use relatively low cost transmitters because the transmitters do not need to have a message or clocking signal receiving capability and the internal clocking signal source within the transmitter may be a relatively inexpensive device or circuit.

L'invention concerne un système pour communiquer avec plusieurs émetteurs à distance, dans lequel les émetteurs envoient des messages sans une source de synchronisation commune ou sans interrogation par un récepteur de contrôle. Dans un mode de réalisation, le système utilise la position temporelle de signaux modulés en fréquence pour coder l'identité et/ou d'autres informations envoyées par le récepteur. Ce système peut mettre en oeuvre des émetteurs d'un coût relativement faible puisqu'il n'est pas nécessaire que ceux-ci possèdent une fonction de réception de message ou de signal de synchronisation et que la source de signal de synchronisation interne au sein de l'émetteur peut être un dispositif ou un circuit relativement bon marché.

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