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US 9,426,268 B2Granted
Method and apparatus for gauge identification based on single ended line testing (SELT)
AssigneeIkanos Communications, Inc.
InventorsBehzad Ahmadi, Robin Levonas, Vipin Pathak
Life of this patent
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Abstract
The present invention relates generally to characterizing loops in a communication system, and more particularly to methods and apparatuses for loop gauge identification. In accordance with certain aspects, embodiments of the invention extract some information from the SELT signal. From SELT, the loop impedance, or equivalently input impedance, is determined. This information is then used for gauge identification.
Claims15
A method for identifying a gauge of a loop, comprising:
- receiving, at a central office (CO) device, a reflection of a signal on the loop, the reflection having a value for each of a plurality of tones in the signal;
- determining a plurality of impedance values of the loop using the reflection, wherein the plurality of impedance values are average impedance values over a respective plurality of windows of the plurality of tones;
- and
- identifying the gauge of the loop using the plurality of impedance values.
1 more element
A method for identifying a gauge of a loop, comprising:
- receiving, at a central office (CO) device, a reflection of a signal on the loop, the reflection having a value for each of a plurality of tones in the signal;
- determining a plurality of impedance values of the loop using the reflection, wherein the plurality of impedance values are average impedance values over a respective plurality of windows of the plurality of tones;
- forming an initial estimate of the gauge of the loop using the plurality of impedance values;
- estimating a length of the loop using the initial estimate of the gauge;
- and
- identifying the gauge of the loop using the estimated length of the loop and the plurality of impedance values.
3 more elements
Dependencies are inferred from the claim text.