Shared hybrid-fiber coax transmission system having increased bandwidth in the upstream and downstream directions
First Claim
1. For use with a shared hybrid-fiber coax transmission system that transmits downstream information within a first frequency band from a head end to individual subscribers on a main coax and which transmits upstream information generated by individual subscribers to a head end on the main coax, a method for increasing the bandwidth and reducing noise, comprising the steps of:
- aggregating the upstream information onto the main coax digitally modulating at least a portion of the upstream information into a second frequency band above the downstream information;
digitally regenerating the upstream information; and
digitally regenerating a portion of the downstream information lying in a frequency band immediately below the second frequency band.
1 Assignment
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Accused Products
Abstract
Bandwidth is increased and noise may be reduced in a shared hybrid fiber-coax transmission system (10) by digitally modulating upstream information onto a high frequency band (e.g., 750-1000 MHz) and thereafter digitally regenerating both the high frequency upstream information as well as a portion of the downstream information not used for broadcast video (i.e., the 500-750 MHz band).
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Citations
6 Claims
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1. For use with a shared hybrid-fiber coax transmission system that transmits downstream information within a first frequency band from a head end to individual subscribers on a main coax and which transmits upstream information generated by individual subscribers to a head end on the main coax, a method for increasing the bandwidth and reducing noise, comprising the steps of:
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aggregating the upstream information onto the main coax digitally modulating at least a portion of the upstream information into a second frequency band above the downstream information; digitally regenerating the upstream information; and digitally regenerating a portion of the downstream information lying in a frequency band immediately below the second frequency band. - View Dependent Claims (2)
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3. For use with a shared hybrid-fiber coax transmission system that transmits across a main coaxial cable downstream information within a first frequency band to individual subscribers and that transmits upstream information generated by individual subscribers, a method for increasing the bandwidth and reducing noise, comprising the steps of:
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aggregating the upstream information onto the main coax digitally modulating at least a first portion of the upstream information via a carrier to a second frequency band above the first frequency band prior to transmission on the main coaxial cable; separating the first portion of the upstream information from other information on the main coaxial cable; digitally regenerating the upstream information; re-injecting the upstream information onto the main coaxial cable; separating a first portion of the downstream information of the main coaxial cable; digitally regenerating the first portion of the downstream information; and re-injecting the downstream information onto the main coaxial cable. - View Dependent Claims (4, 5, 6)
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Specification