Adaptive gain control based on echo canceller performance...

Details Adaptive gain control based on echo canceller performance... Adaptive gain control based on echo canceller performance...

2007-01-16

2007-01-16

Nguyen, Chau (Department: 2616)

Multiplex communications

Duplex

Transmit/receive interaction control

C370S289000

Reexamination Certificate

active

10077133

ABSTRACT:
A system and method for provide a stable gain from an adaptive gain control device in a signal path. An echo canceller is also located in the signal path, and is used to provide performance information regarding losses in the signal. This performance information is fed to the automatic gain control device via a connection. The automatic gain control device thereafter uses the performance information to determine a maximum gain that might be provided based upon losses cause by echo conditions. The gain however is limited in order to provide for a stable system. The performance information includes a loss rate that includes a combination of the echo return loss and the echo return loss enhancement.

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