Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2003-11-10
2008-03-25
Wang, Ted (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S285000, C375S346000, C375S372000, C370S286000, C370S292000, C379S406010, C379S406050, C379S406120
Reexamination Certificate
active
07349482
ABSTRACT:
An echo cancellation circuit includes delay units at its input unit and output unit in order to adjust the delay caused by a FIFO. The delay times of the delay units are trained using a training signal, such the REVERB signal, that is a system initializing signal. In addition, an upstream pilot tone is used to tune the delay time. The performance of the echo cancellation circuit is optimized according to the device and the method described.
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Mills & Onello LLP
Wang Ted
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