Wideband frequency domain reflectometry to determine the nature and location of subscriber line faults
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United States of America Patent
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Jun 10, 2008
Grant Date -
Oct 27, 2005
app pub date -
Apr 27, 2004
filing date -
Apr 27, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A technique for estimating distances and the nature of irregularities and faults on a telephone subscriber line is disclosed. Reflected test signals are measured as a function of frequency. The measurements are compensated for variable propagation velocity and variable line attenuation and then weighted before transformation with the Fourier transform. The amplitude and phase of peaks in the spectral domain identify the distances to the irregularities and the magnitude and phase angle of the reflection coefficients.
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- Non-US Classification not provided for expired patents
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