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1. (WO2001001158) SINGLE ENDED MEASUREMENT METHOD AND SYSTEM FOR DETERMINING SUBSCRIBER LOOP MAKE UP

Pub. No.:    WO/2001/001158    International Application No.:    PCT/US2000/016865
Publication Date: Fri Jan 05 00:59:59 CET 2001 International Filing Date: Tue Jun 20 01:59:59 CEST 2000
IPC: H04B 3/46
H04L 1/24
H04L 25/02
H04M 3/30
Applicants: TELCORDIA TECHNOLOGIES, INC.
Inventors: GALLI, Stefano
WARING, David, L.
Title: SINGLE ENDED MEASUREMENT METHOD AND SYSTEM FOR DETERMINING SUBSCRIBER LOOP MAKE UP
Abstract:
A method and system for determining the make-up of a subscriber loop (220) comprising sending pulses onto a loop and acquiring data based on received echo signals. Determining (7301) from the received echoes each discontinuity on the loop and, based on each discontinuity, determining a channel transfer function (7305) for each loop section preceding the discontinuity. The transfer function is then used to synthesize an inverse filter (7309). The inverse filter and acquired data are convolved for all the loop sections preceding the discontinuity (7313). The method may be further improved by modeling real and spurious echoes and subtracting these echoes from the echoes generated in the loop.