Method for the adaptive control of a digital echo canceller...

Details Method for the adaptive control of a digital echo canceller... Method for the adaptive control of a digital echo canceller...

H - Electricity

04

B

H04B 7/015 (2006.01) H04B 3/23 (2006.01)

Patent

CA 2137130

The echo canceller digital filter is first set to zero. Then a test signal is sent through the down link to the echo canceller and the filter taps are adjusted until the echo signal in the up link to the echo canceller is less than a predetermined stored reference level. The test signal is then removed and the number of filter taps having signal samples nearing zero and/or the number of filter taps having significant signal samples is determined and thereafter the taps having non-signi- ficant signal samples are eliminated for making the echo canceller ready for operation.

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