System and method for transmission system automatic impedance ma

Details System and method for transmission system automatic impedance ma System and method for transmission system automatic impedance ma

1996-04-11

1998-09-01

Matar, Ahmad F.

Telephonic communications

Line equalization or impedance matching

379394, 379399, 379402, 375222, H04M 704, H04B 138

Patent

active

058021698

ABSTRACT:
A system and method having automatic selection of impedance values for matching against unknown line impedances. The method stores an expected set of desired return loss measurements at given frequencies and matches the calculated set against the actual measured return losses to arrive at a close approximation of the line impedance. The system is then adjusted based upon this determined close approximation. The starting point for the stored set are standard models established for each network. In situations where the actual varies greatly from the predicted, a different model is selected and the expected scores for that model are used.

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patent: 5623514 (1997-04-01), Arai

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