Compensation of Loudspeaker Nonlinearity in Acoustic Echo Cancellation Using Raised-Cosine Function
The nonlinearity of a power amplifier or loudspeaker in a large-signal situation gives rise to a nonlinear distortion of acoustic signal. A conventional acoustic echo canceller using linear adaptive filters is not able to eliminate the nonlinear echo component. In this brief, a novel nonlinear echo...
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| Veröffentlicht in: | IEEE transactions on circuits and systems. 2, Analog and digital signal processing Analog and digital signal processing, 2006-11, Vol.53 (11), p.1190-1194 |
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| container_issue | 11 |
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| container_title | IEEE transactions on circuits and systems. 2, Analog and digital signal processing |
| container_volume | 53 |
| creator | Dai, Hongyun Zhu, Wei-Ping |
| description | The nonlinearity of a power amplifier or loudspeaker in a large-signal situation gives rise to a nonlinear distortion of acoustic signal. A conventional acoustic echo canceller using linear adaptive filters is not able to eliminate the nonlinear echo component. In this brief, a novel nonlinear echo cancellation technique is presented by using a nonlinear transformation in conjunction with a conventional linear adaptive filter. The nonlinear transformation is derived from a raised-cosine function and is exploited to compensate for the nonlinearity of a loudspeaker. The transformation parameters are updated using the normalized least mean square algorithm according to the unknown nonlinear characteristic of the loudspeaker. Computer simulations show that the proposed method yields, in general, a satisfactory cancellation performance while having a very low computational complexity |
| doi_str_mv | 10.1109/TCSII.2006.882344 |
| format | Article |
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A conventional acoustic echo canceller using linear adaptive filters is not able to eliminate the nonlinear echo component. In this brief, a novel nonlinear echo cancellation technique is presented by using a nonlinear transformation in conjunction with a conventional linear adaptive filter. The nonlinear transformation is derived from a raised-cosine function and is exploited to compensate for the nonlinearity of a loudspeaker. The transformation parameters are updated using the normalized least mean square algorithm according to the unknown nonlinear characteristic of the loudspeaker. 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A conventional acoustic echo canceller using linear adaptive filters is not able to eliminate the nonlinear echo component. In this brief, a novel nonlinear echo cancellation technique is presented by using a nonlinear transformation in conjunction with a conventional linear adaptive filter. The nonlinear transformation is derived from a raised-cosine function and is exploited to compensate for the nonlinearity of a loudspeaker. The transformation parameters are updated using the normalized least mean square algorithm according to the unknown nonlinear characteristic of the loudspeaker. 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A conventional acoustic echo canceller using linear adaptive filters is not able to eliminate the nonlinear echo component. In this brief, a novel nonlinear echo cancellation technique is presented by using a nonlinear transformation in conjunction with a conventional linear adaptive filter. The nonlinear transformation is derived from a raised-cosine function and is exploited to compensate for the nonlinearity of a loudspeaker. The transformation parameters are updated using the normalized least mean square algorithm according to the unknown nonlinear characteristic of the loudspeaker. Computer simulations show that the proposed method yields, in general, a satisfactory cancellation performance while having a very low computational complexity</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TCSII.2006.882344</doi><tpages>5</tpages></addata></record> |
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| ispartof | IEEE transactions on circuits and systems. 2, Analog and digital signal processing, 2006-11, Vol.53 (11), p.1190-1194 |
| issn | 1549-7747 1057-7130 1558-3791 |
| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Acoustic echo cancellation (AEC) Acoustics Adaptive filters Cancellation Computational complexity Computational modeling Echo cancellers Loudspeakers Mathematical analysis Mathematical models Nonlinear acoustics Nonlinear distortion Nonlinearity nonlinearity compensation Polynomials Power amplifiers raised-cosine function Signal processing algorithms Transformations |
| title | Compensation of Loudspeaker Nonlinearity in Acoustic Echo Cancellation Using Raised-Cosine Function |
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