Wideband frequency domain reflectometry to determine the nature and location of subscriber line faults
US7385932B2 · kind B2 · utility
3Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2004 |
| Grant date | Jun 10, 2008 |
| Priority date | — |
| Expiry date | May 5, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L43/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.