Echo canceling method and apparatus for data over cellular

Details Echo canceling method and apparatus for data over cellular Echo canceling method and apparatus for data over cellular

H - Electricity

04

B

H04B 3/23 (2006.01) H04M 11/06 (2006.01)

Patent

CA 2186405

A far-end modem transmits a "pilot tone" during the time that a near-end modem is training its echo canceler. Correspondingly, the near-end modem is modified to notch, or filter, out this pilot tone from the received signal. The filtered received signal is then used by the near-end modem to train its echo canceler.

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