Method and arrangement for a digital subscriber line

The present invention relates to a method and an arrangement based on two-port network (TPN) theory that allows analytically estimating the loop transfer function from open and short-circuited input impedance measurements, e.g. single ended line transmission (SELT) measurements, by utilizing the fac...

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Bibliographic Details
Main Authors RODRIGUES ROBERTO MENEZES, KLAUTAU ALDEBARO, ERICSON KLAS, COSTA JOÄO C. WEYL ALBUQERQUE
Format Patent
LanguageEnglish
Published 05.08.2014
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TELEPHONIC COMMUNICATION
TESTING
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Summary:The present invention relates to a method and an arrangement based on two-port network (TPN) theory that allows analytically estimating the loop transfer function from open and short-circuited input impedance measurements, e.g. single ended line transmission (SELT) measurements, by utilizing the fact that the line under test (LUT) can be considered reciprocal and by assuming that the LUT is symmetric. Hence, by using the present invention and an estimation of the noise on the line, the attainable bit rate at the customer premises can be determined by means of SELT measurements at the CO. The transfer function of a telephone copper-loop is estimated regardless of its topology by impedance measurements from the CO side. Specifically, such estimation is carried out from the calculation of the transmission parameters of loop, which are expressed only in terms of open and short-circuited input impedance measurements at the CO when reciprocity and symmetry is assumed.
Bibliography:Application Number: US200813060928