Telecommunications – Interference signal transmission
Patent
1996-09-18
1999-10-05
Grant, Chris
Telecommunications
Interference signal transmission
348 12, H04N 7173
Patent
active
059638443
ABSTRACT:
Increased upstream bandwidth and reduced ingress noise in a shared hybrid fiber-coax transmission system (100) are obtained by modulating at least a portion of upstream signals received from subscribers to a high frequency band (e.g., 750-1000 MHz), thereby increasing the upstream bandwidth. The high frequency upstream signals are then digitally regenerated in the coaxial cable (200) plant prior to receipt at a fiber node (180). At the fiber node, the high-frequency upstream signals are again digitally regenerated and are then transmitted optically in a baseband digital format between the fiber node (180) and a head end (120). The digital regeneration of the high frequency upstream signals, and the optical transmission of such signals in a baseband digital format reduces the incidence of ingress noise.
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AT&T Corp.
Grant Chris
Levy Robert B.
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