WO2002027983A3 - Distance to fault measurement using multi-path cdma signals - Google Patents

Distance to fault measurement using multi-path cdma signals Download PDF

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Publication number
WO2002027983A3
WO2002027983A3 PCT/US2001/026135 US0126135W WO0227983A3 WO 2002027983 A3 WO2002027983 A3 WO 2002027983A3 US 0126135 W US0126135 W US 0126135W WO 0227983 A3 WO0227983 A3 WO 0227983A3
Authority
WO
WIPO (PCT)
Prior art keywords
distance
fault
cdma signals
communications link
cell site
Prior art date
Application number
PCT/US2001/026135
Other languages
French (fr)
Other versions
WO2002027983A2 (en
Inventor
Cory R Christensen
Clair Jon Q St
Jeffrey N Highley
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Priority to AU2001286594A priority Critical patent/AU2001286594A1/en
Publication of WO2002027983A2 publication Critical patent/WO2002027983A2/en
Publication of WO2002027983A3 publication Critical patent/WO2002027983A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/15—Performance testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/15—Performance testing
    • H04B17/17—Detection of non-compliance or faulty performance, e.g. response deviations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/15—Performance testing
    • H04B17/19—Self-testing arrangements

Abstract

The present invention is for measuring a distance to a fault (26) in a direct sequence spread spectrum communications link such as a cell site antenna (12) in a CDMA cellular system (10). Specifically, a time offset of a forward path signal (22) is measured with respect to a second correlated reference signal. A timing difference (t1-t2) between the time offset of the forward path signal (22) and the reflected path signals (24) is then estimated to determine a distance to the communications link fault (26). The present invention therefore minimized cell site down time and eliminates the need for external test signals.
PCT/US2001/026135 2000-09-26 2001-08-21 Distance to fault measurement using multi-path cdma signals WO2002027983A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001286594A AU2001286594A1 (en) 2000-09-26 2001-08-21 Distance to fault measurement using multi-path cdma signals

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US66913300A 2000-09-26 2000-09-26
US09/669,133 2000-09-26

Publications (2)

Publication Number Publication Date
WO2002027983A2 WO2002027983A2 (en) 2002-04-04
WO2002027983A3 true WO2002027983A3 (en) 2002-06-06

Family

ID=24685164

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/026135 WO2002027983A2 (en) 2000-09-26 2001-08-21 Distance to fault measurement using multi-path cdma signals

Country Status (2)

Country Link
AU (1) AU2001286594A1 (en)
WO (1) WO2002027983A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014007151A1 (en) * 2014-05-15 2015-11-19 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg A method for locating defective locations in an RF signal transmission path
CN113253062B (en) * 2021-06-18 2021-09-28 广东电网有限责任公司佛山供电局 Power cable fault inspection system based on risk hidden danger

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57141567A (en) * 1981-02-26 1982-09-01 Fujitsu Ltd Fault point detecting system for submarine coaxial repeating system
US5471649A (en) * 1990-03-31 1995-11-28 Motorola, Inc. Base station transceiver diagnostic equipment
US6118409A (en) * 1997-02-14 2000-09-12 Nokia Mobile Phones, Ltd. Method and device for inspecting at least one antenna branch, in particular in a vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57141567A (en) * 1981-02-26 1982-09-01 Fujitsu Ltd Fault point detecting system for submarine coaxial repeating system
US5471649A (en) * 1990-03-31 1995-11-28 Motorola, Inc. Base station transceiver diagnostic equipment
US6118409A (en) * 1997-02-14 2000-09-12 Nokia Mobile Phones, Ltd. Method and device for inspecting at least one antenna branch, in particular in a vehicle

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 245 (P - 159) 3 December 1982 (1982-12-03) *
TAYLOR V ET AL: "Line monitoring and fault location using spread spectrum on power line carrier", IEE PROCEEDINGS: GENERATION, TRANSMISSION AND DISTRIBUTION, INSTITUTION OF ELECTRICAL ENGINEERS, GB, vol. 143, no. 5, 13 September 1996 (1996-09-13), pages 427 - 434, XP006006488, ISSN: 1350-2360 *

Also Published As

Publication number Publication date
WO2002027983A2 (en) 2002-04-04
AU2001286594A1 (en) 2002-04-08

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