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Missouri University of Science and Technology
Adaptive filters -- Design and construction<br />Echo suppression (Telecommunication)
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Performance Improvement Of Adaptive Filters For Echo Cancellation Applications, Deepak Challa
Performance Improvement Of Adaptive Filters For Echo Cancellation Applications, Deepak Challa
Masters Theses
"This work focuses on performance improvement of adaptive algorithms for both line and acoustic echo cancellation applications. Echo in telephone networks, Line Echo, is observed naturally due to impedance mismatches at the long-distance/local-loop interface. Acoustic echo is due to the acoustic coupling between the microphone and the speaker of a speakerphone. The Affine Projection (APA) and the Fast Affine Projection (FAP) algorithms are two examples of reliable and efficient adaptive filters used for echo cancellation...This thesis presents, Variable Regularized Fast Affine Projections (VR-FAP) algorithm, with a varying, optimal regularization value which provides the desirable property of both fast and low …