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US 8,509,389 B2Granted
Systems and methods for loop length estimation based on per-port calibration
AssigneeIkanos Communications, Inc.
InventorsPatrick Duvaut, Amitkumar Mahadevan, Vaibhav Dinesh
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Abstract
Systems and methods for performing loop length estimation are described. One embodiment includes a method which comprises receiving an echo signal for a loop under test where the echo signal is a per-port calibrated echo response obtained using frequency domain reflectometry single-ended line testing (FDR-SELT). The method further comprises analyzing characteristics of the echo signal to perform a loop length estimation based on data relating to ripple frequency as a function of loop length.
Claims20
A method comprising:
- receiving an echo signal for a loop under test, the echo signal being a per-port calibrated echo response obtained using frequency domain reflectometry single-ended line testing (FDR-SELT);
- and
- analyzing characteristics of the echo signal to perform a loop length estimation based on data relating to ripple frequency as a function of loop length, the method further comprising specifying a region for performing the loop length estimation, the loop length estimation being further performed based on the specified region.
A method comprising:
- measuring a calibrated echo signal of a loop under test;
- and
- estimating a loop length based on ripples on the calibrated echo signal and a specified region.
A system comprising:
- a first module coupled to a loop, the first module configured to generate a test signal and receive a reflected signal to determine an echo response of the loop;
- a second module configured to receive the echo response measurement from the first module, the second module configured to determine characteristics associated with the loop based on the echo response, the second module configured to output a loop length estimation based on data relating to ripple frequency as a function of loop length;
- and
- a noise removal module configured to reduce noise on the reflected signal to increase accuracy of the loop length estimation.
1 more element
Dependencies are inferred from the claim text.