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A simple mathematical model is proposed to represent the nonlinear characteristics of the combined power amplifier and loudspeaker in acoustic echo cancellers. Three adjustable parameters of the model relate to the distinct parts of the nonlinearity: the linear region for small amplitude, the onset elbow where the nonlinearity begins, and the saturation region for large amplitudes. Compared to a piece-wise linear model, this approach has continuous first derivatives. In combination with linear adaptive filters, this model allows for the efficient design of echo cancellers.
Author (s): Abuelma’atti, Muhammad Taher
Affiliation:
King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
(See document for exact affiliation information.)
Publication Date:
2011-10-06
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Permalink: https://aes2.org/publications/elibrary-page/?id=16112
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Abuelma’atti, Muhammad Taher; 2011; A Note on Mathematical Modeling of Power Amplifier/Loudspeaker Nonlinearity in Acoustic Echo Cancelers [PDF]; King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia; Paper ; Available from: https://aes2.org/publications/elibrary-page/?id=16112
Abuelma’atti, Muhammad Taher; A Note on Mathematical Modeling of Power Amplifier/Loudspeaker Nonlinearity in Acoustic Echo Cancelers [PDF]; King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia; Paper ; 2011 Available: https://aes2.org/publications/elibrary-page/?id=16112
@article{abuelma’atti2011a,
author={abuelma’atti muhammad taher},
journal={journal of the audio engineering society},
title={a note on mathematical modeling of power amplifier/loudspeaker nonlinearity in acoustic echo cancelers},
year={2011},
volume={59},
issue={10},
pages={745-748},
month={november},}