System and method for providing multiple services in HFC CATV networks

Various channels containing digital data for CATV services are distributed over the HFC CATV network from the headend. Digital data is modulated on RF sub-carriers within an allocated downstream RF spectrum. The allocated downstream RF spectrum is split such that different parts of the RF spectrum a...

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Bibliographic Details
Main Authors SAXENA VIVEK, LEDDY JOHN G
Format Patent
LanguageEnglish
Published 03.11.2005
Edition7
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:Various channels containing digital data for CATV services are distributed over the HFC CATV network from the headend. Digital data is modulated on RF sub-carriers within an allocated downstream RF spectrum. The allocated downstream RF spectrum is split such that different parts of the RF spectrum are transmitted by WDM lasers in a transmitter system including an array of such lasers. The transmitter system utilizes WDM to combine different wavelengths from the laser array on the transmitter side and then launches them onto a single fiber. The transmitted optical signals impinge on a single photo device which reproduces the combined RF spectrum at its output.
Bibliography:Application Number: US20040833430