Echo cancelling method and apparatus for data over cellular

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

H - Electricity

04

B

H04B 3/23 (2006.01) H04M 11/06 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2186404

A processor of a cellular modem monitors for the presence of a residual echo signal during a full-duplex portion of a training sequence. In particular, the processor monitors an equalizer error signal during a full-duplex training phase that follows the half-duplex training phase for the echo canceler. If the processor detects a level of the error signal greater than a predefined threshold, the processor presumes the increase in the error signal is due to the presence of a residual echo signal and performs a predefined adjustment of the taps of the corresponding echo canceler of the cellular modem.

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