CA2205248A1 - Hybrid fiber-coax system having at least one digital fiber node and increased upstream and downstream bandwidth - Google Patents

Hybrid fiber-coax system having at least one digital fiber node and increased upstream and downstream bandwidth

Info

Publication number
CA2205248A1
CA2205248A1 CA2205248A CA2205248A CA2205248A1 CA 2205248 A1 CA2205248 A1 CA 2205248A1 CA 2205248 A CA2205248 A CA 2205248A CA 2205248 A CA2205248 A CA 2205248A CA 2205248 A1 CA2205248 A1 CA 2205248A1
Authority
CA
Canada
Prior art keywords
fiber
node
upstream
signals
high frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2205248A
Other languages
French (fr)
Other versions
CA2205248C (en
Inventor
James E. Dail
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
AT&T Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AT&T Corp filed Critical AT&T Corp
Publication of CA2205248A1 publication Critical patent/CA2205248A1/en
Application granted granted Critical
Publication of CA2205248C publication Critical patent/CA2205248C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications

Abstract

Increased upstream bandwidth and reduced ingress noise in a shared hybri d 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 fibe r node (180) and a head end ( 120). The digital regeneration of the high frequency upstre am signals, and the optical transmission of such signals in a baseband digital format reduces the incidence of ingress noise.
CA002205248A 1996-09-18 1997-05-13 Hybrid fiber-coax system having at least one digital fiber node and increased upstream and downstream bandwidth Expired - Fee Related CA2205248C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/718,104 US5963844A (en) 1996-09-18 1996-09-18 Hybrid fiber-coax system having at least one digital fiber node and increased upstream bandwidth
US718,104 1996-09-18

Publications (2)

Publication Number Publication Date
CA2205248A1 true CA2205248A1 (en) 1998-03-18
CA2205248C CA2205248C (en) 2001-02-06

Family

ID=24884835

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002205248A Expired - Fee Related CA2205248C (en) 1996-09-18 1997-05-13 Hybrid fiber-coax system having at least one digital fiber node and increased upstream and downstream bandwidth

Country Status (2)

Country Link
US (1) US5963844A (en)
CA (1) CA2205248C (en)

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Also Published As

Publication number Publication date
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US5963844A (en) 1999-10-05

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