Patent ID: 8155303
Filing Date: 2012-04-10
Classification: H04B

Abstract:
1. A system for canceling an echo component, comprising: a first complex correlator for subjecting an input signal and a delayed feedback signal to a correlation operation to periodically analyze a plurality of echo components; a first adaptive filter including a number of N adaptive algorithm blocks of a number of L taps and a number of N variable delaying means delay-inputting the delayed feedback signal to the adaptive algorithm blocks, the first adaptive filter outputting a first output signal obtained by adaptively canceling the plurality of echo components of the input signal; and a second complex correlator for monitoring an echo cancellation rate of the first adaptive filter by subjecting the delayed feedback signal and the first output signal to a correlation operation; wherein each of the adaptive algorithm blocks is allocated to a time period having a peak value larger than a predetermined value according to the correlation operation of the first complex correlator to generate each of the plurality of echo components by adjusting the variable delay means.