Hand-held telecommunication loop testing device
US6690769B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 2001 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | May 19, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/305
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A signal acquisition device captures signals from a telecommunication line such as a local loop. The captured signals are spectrally analyzed using a signal-processing unit. The output of the signal-processing unit—in the form of a test spectrum—is provided to a signal identification system. The signal identification system comprises at least one of a plurality of spectra of known signals stored as templates. Using a matching algorithm, the spectrum of the test signal (unknown signal) is correlated with spectra of at least two known signals. The unknown signal is determined to be the same type as that of the known signal with whose spectrum the unknown signal produces the largest absolute correlation score. Alternatively, an unknown signals is determined to be that of a known signal if a correlation of both signals results in a score the absolute value of which is greater or equal to a predetermined threshold level. Algorithms such as Chi-Square Test, the Kolmogorov-Smirnov test, and the Cross Correlation test could be used to determine if the unknown signal and the templates are correlated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.