Method for transmission line analysis
US8385510B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2009 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Apr 4, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/062
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A FDR SELT measurement is made in a stop band of a DSL band plan, using a PSD allowed by the PSD mask. Further measurements may also be made in an adjacent pass band and further bands, and the results combined to create a wide-band measurement result. When transformed into the time domain (e.g. by inverse Fourier transform to produce the line impulse response) greater resolution in time (and hence greater spatial resolution) is achieved. In order to compensate for AGC calibration errors measurements using different AGC steps may be scaled to fit smoothly to each other. If measurements overlap, measurement results in the region of overlap may be combined in various ways to limit the influence of noise and to create a smooth transition from one measurement to the next.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.