Transmitter in a digital return link for use in an hfc network

Details Transmitter in a digital return link for use in an hfc network Transmitter in a digital return link for use in an hfc network

H - Electricity

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H04B 10/04 (2006.01) G02B 6/42 (2006.01) H01S 5/06 (2006.01) H04B 10/12 (2006.01) H04B 10/24 (2006.01) H04N 7/10 (2006.01) H04N 7/173 (2006.01) H04N 7/22 (2006.01)

Patent

CA 2506263

A transmitter in a digital return link for use in an HFC network includes an analog to digital converter for digitizing a broadband analog RF input. The A/D converter has a parallel bit stream output. A serializer converts the parallel bit stream from the converter to a serial bit stream. An electroabsorption modulated laser converts the serial bit stream to an optical serial bit stream for transmission over the HFC network.

L'invention concerne un émetteur dans une liaison retour numérique s'utilisant dans un réseau HFC, qui comprend un convertisseur analogique-numérique pour numériser un signal d'entrée HF analogique à large bande. Le convertisseur A/N comporte une sortie train de bits parallèle. Un convertisseur parrallèle-série convertit le train de bits parallèle sortant du convertisseur A/N en train de bits série. Un laser modulé par électroabsorption convertit le train de bits série en un train de bits série optique en vue d'une transmission de celui-ci sur le réseau HFC.

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