Modem circuitry

Details Modem circuitry Modem circuitry

1980-04-03

1982-08-03

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

333 18, H04B 314

Patent

active

043430414

ABSTRACT:
Modem receiver apparatus having circuitry for automatically adaptively equalizing received signals, including equalizer updating circuitry for updating coefficients stored in the equalizer, wherein the apparatus comprises circuitry for detecting the duration of periodicity in the received signals, circuitry for comparing the duration to a threshold, and circuitry for freezing the updating circuitry when the duration exceeds the threshold and for otherwise releasing the updating circuitry to permit updating of the coefficients.

REFERENCES:
patent: 3697689 (1972-10-01), Gibson
patent: 3723911 (1973-03-01), Forney
patent: 3935535 (1976-01-01), Motley

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