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Application of time-frequency domain reflectometry for detection and localization of a fault on a coaxial cable

In this paper, we introduce a new high-resolution reflectometry technique that operates simultaneously in both the time and frequency domains. The approach rests upon time-frequency signal analysis and utilizes a chirp signal multiplied by a Gaussian time envelope. The Gaussian envelope provides tim...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2005-12, Vol.54 (6), p.2493-2500
Main Authors: Shin, Y.-J., Powers, E.J., Choe, T.-S., Chan-Young Hong, Eun-Seok Song, Jong-Gwan Yook, Jin Bae Park
Format: Article
Language:English
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Summary:In this paper, we introduce a new high-resolution reflectometry technique that operates simultaneously in both the time and frequency domains. The approach rests upon time-frequency signal analysis and utilizes a chirp signal multiplied by a Gaussian time envelope. The Gaussian envelope provides time localization, while the chirp allows one to excite the system under test with a swept sinewave covering a frequency band of interest. This latter capability is of particular interest when testing communication cables and systems. Sensitivity in detecting the reflected signal is provided by a time-frequency cross-correlation function. The approach is verified by experimentally locating various types of faults, located at various distances, in RG 142 and RG 400 coaxial cables.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2005.858115