Line equalizer control method, and integrating circuit, frequenc

Details Line equalizer control method, and integrating circuit, frequenc Line equalizer control method, and integrating circuit, frequenc

1997-03-27

1999-10-05

Chin, Stephen

Pulse or digital communications

Equalizers

Automatic

375232, 333 28R, H03H 740, H03H 500

Patent

active

059635932

ABSTRACT:
A method of controlling a line equalizer such as a modem includes an extracting step of extracting plural tone signals each superimposed on a transmission signal and having a specific frequency component; a judging step of judging levels of the extracted tone signals; and a controlling step of controlling characteristic of a line equalizer which equalizes a receive signal, based on the levels of the judged tone signals. A line equalizer is controlled without performing an exchange of a training signal prior to starting a data transmission and without increasing the amount of hardware of a modem or the like.

REFERENCES:
patent: 3758881 (1973-09-01), Rummler
patent: 3763359 (1973-10-01), Cho et al.
patent: 4003006 (1977-01-01), Mandeville et al.
patent: 4801900 (1989-01-01), Mower

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