Optical data communication and location apparatus, system...

H - Electricity – 04 – B

Patent

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H04B 10/10 (2006.01) G07C 1/10 (2006.01) G07C 9/00 (2006.01) H04B 10/04 (2006.01) H04B 10/06 (2006.01)

Patent

CA 2200341

An optical data communication and location apparatus for at least one location in a facility having at least one receiver at said at least one location. A plurality of portable transmitters provides optical wireless data links with the receiver. Each of the transmitters has a power supply with circuitry for transmitting data packets over said optical wireless data links to the receiver. The circuitry for transmitting data packets generates a data code having at least two time frames, each of the at least two times frames being divided into at least two data time slots. Each frame has exactly one pulse in one data time slot whereby in each data packet, there is encoded n-bits of binary data where 2n is equal to the number of time slots in each frame.

L'invention concerne un appareil de transmission optique de données et de localisation qui est destiné à un site au moins d'une installation qui comporte au moins un récepteur sur ce site. Plusieurs émetteurs portatifs fournissent des liaisons optiques de données sans fil avec ce récepteur. Chaque émetteur comporte une alimentation et des circuits qui émettent des paquets de données vers le récepteur grâce à ces liaisons optiques de données sans fil. Le circuit de transmission de paquets de données génère un code de données comportant au moins deux trames temporelles dont chacune est divisée en deux tranches de temps de données. Chaque trame comporte exactement une impulsion par tranche de temps de données de façon que, dans chaque paquet de données soient codés n bits de données binaires, où 2?n¿ est égal au nombre de tranches de temps de chaque trame.

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