WO2003067800A3 - Radio frequency characterization of cable plant and corresponding calibration of communication equipment communicating via the cable plant - Google Patents

Radio frequency characterization of cable plant and corresponding calibration of communication equipment communicating via the cable plant Download PDF

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Publication number
WO2003067800A3
WO2003067800A3 PCT/US2003/003453 US0303453W WO03067800A3 WO 2003067800 A3 WO2003067800 A3 WO 2003067800A3 US 0303453 W US0303453 W US 0303453W WO 03067800 A3 WO03067800 A3 WO 03067800A3
Authority
WO
WIPO (PCT)
Prior art keywords
cable plant
switch router
upstream
radio frequency
communication equipment
Prior art date
Application number
PCT/US2003/003453
Other languages
French (fr)
Other versions
WO2003067800A2 (en
Inventor
Lance R Reidhead
Walt Evanyk
Original Assignee
Advent Networks Inc
Lance R Reidhead
Walt Evanyk
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 Advent Networks Inc, Lance R Reidhead, Walt Evanyk filed Critical Advent Networks Inc
Priority to AU2003215053A priority Critical patent/AU2003215053A1/en
Publication of WO2003067800A2 publication Critical patent/WO2003067800A2/en
Publication of WO2003067800A3 publication Critical patent/WO2003067800A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H04N21/42676—Internal components of the client ; Characteristics thereof for modulating an analogue carrier signal to encode digital information or demodulating it to decode digital information, e.g. ADSL or cable modem
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0002—Modulated-carrier systems analog front ends; means for connecting modulators, demodulators or transceivers to a transmission line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/615—Signal processing at physical level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
    • H04N21/64723—Monitoring of network processes or resources, e.g. monitoring of network load
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/022—Channel estimation of frequency response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se

Abstract

A switch router (201) and one or more gateways (203) incorporating a diagnostic and calibration system that performs RF characterization of an underlying cable plant. The switch router (201) is connected at a point of insertion (103) or point of distribution (105) and each gateway is located downstream, such as at corresponding subscriber locations. The switch router (201) and each gateway (203) sends a test signal with known characteristics and power level, and the receiving device (205) determines noise level and power loss for the corresponding downstream and upstream channel pair. The power loss information is used to calibrate the power level of the transmitters. The noise levels are used to determine if the selected modulation schemes employed for normal communications is realizable. A frequency analysis, such as FFT or the like, is performed on the upstream test signal spectrum to derive valuable frequency information for the upstream channel or the entire upstream bandwidth.
PCT/US2003/003453 2002-02-07 2003-02-06 Radio frequency characterization of cable plant and corresponding calibration of communication equipment communicating via the cable plant WO2003067800A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003215053A AU2003215053A1 (en) 2002-02-07 2003-02-06 Radio frequency characterization of cable plant and corresponding calibration of communication equipment communicating via the cable plant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/072,479 2002-02-07
US10/072,479 US7162731B2 (en) 2002-02-07 2002-02-07 Radio frequency characterization of cable plant and corresponding calibration of communication equipment communicating via the cable plant

Publications (2)

Publication Number Publication Date
WO2003067800A2 WO2003067800A2 (en) 2003-08-14
WO2003067800A3 true WO2003067800A3 (en) 2004-01-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/003453 WO2003067800A2 (en) 2002-02-07 2003-02-06 Radio frequency characterization of cable plant and corresponding calibration of communication equipment communicating via the cable plant

Country Status (4)

Country Link
US (1) US7162731B2 (en)
AU (1) AU2003215053A1 (en)
TW (1) TWI225342B (en)
WO (1) WO2003067800A2 (en)

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US7162731B2 (en) 2007-01-09
TWI225342B (en) 2004-12-11
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US20030149991A1 (en) 2003-08-07
AU2003215053A1 (en) 2003-09-02
TW200303126A (en) 2003-08-16
WO2003067800A2 (en) 2003-08-14

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