Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2006-03-07
2006-03-07
Hoff, Marc S. (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C702S057000, C702S067000, C702S071000
Reexamination Certificate
active
07010441
ABSTRACT:
In a method and system for determining the composition of a subscriber loop, the method consists of analyzing the echo responses generated by the transmittal of pulses onto the subscriber loop. In the method, discontinuities along a loop are identified sequentially by comparing the measured waveform to waveforms generated on the basis of a hypothesized topology. The best match for the waveform is identified using a maximum likelihood approach and a maximum a-posteriori probability (MAP) estimator using observed knowledge regarding the loop plant. A multiple path search is also utilized to improve results and reduce computation time. Once the generated waveform that best matched the measured data had been found and a discontinuity identified, the waveform generated is subtracted from the measured data to produce a compensated waveform, which is used to detect the location and cause of the next echo. A calibration method is implemented to further improve data acquisition.
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Galli Stefano
Kerpez Kenneth J.
Giordano Joseph
Hoff Marc S.
Schoneman William A.
Suarez Felix
Telcordia Technologies Inc.
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