Echo canceller gain control for channel diagnostic systems

Details Echo canceller gain control for channel diagnostic systems Echo canceller gain control for channel diagnostic systems

2005-03-31

2009-12-01

Fan, Chieh M (Department: 2611)

Pulse or digital communications

Testing

C375S219000, C375S230000, C370S242000, C370S248000, C324S534000, C324S533000, C324S543000, C324S539000

Reexamination Certificate

active

07627025

ABSTRACT:
A method and apparatus for detecting faults in cables. The method and apparatus comprise receiving a reflected signal; multiplying an estimation of the reflected signal from an echo canceller by a predetermined gain factor; subtracting the value obtained as a result of the multiplication from the received reflected signal; and generating an error signal to adapt the echo canceller tap weight to match the real received reflected signal.

REFERENCES:
patent: 4564934 (1986-01-01), Macchi
patent: 5311503 (1994-05-01), Kokubo et al.
patent: 6980007 (2005-12-01), Lo et al.
patent: 2004/0032921 (2004-02-01), Bui

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