H - Electricity – 04 – B
Patent
H - Electricity
04
B
379/64, 340/72
H04B 3/20 (2006.01) H04B 3/23 (2006.01) H04L 5/14 (2006.01)
Patent
CA 1240751
ABSTRACT A system is provided for bidirectional digital transmission with echo cancellation, in which measurement of the received data signal is carried out to permit automatic adjustment of an attenuator and of a line equalizer. Measurement is carried out by adding a pro- gressively incremented digitally generated signal to a received signal until zero crossings of the latter are suppressed. The incrementing of the digital signal may be linear or dichotomic.
508937
Ambrosio Renato
Brosio Alberto
Fausone Alfredo
Tofanelli Adler
Ridout & Maybee Llp
Telecom Italia S.p.a.
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