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| Titel: |
A Modified Structure for Feed Forward Active Noise Control Systems With Improved Performa |
| Auteur: |
P.Babu A.Krishnan |
| Verschenen in: |
International journal of computer science and information technology |
| Paginering: | Jaargang 2 (2010) nr. 4 pagina's 150-160 |
| Jaar: |
2010 |
| Inhoud: |
Several approaches have been introduced in literature for active noise control (ANC) systems. SinceFxLMS algorithm appears to be the best choice as a controller filter, researchers tend to improveperformance of ANC systems by enhancing and modifying this algorithm. In this paper, the existingFxLMS algorithm is modified which provides a new structure for improving the noise reduction andconvergence rate. Here the proposed method uses two variable step sizes, one for control filter andanother for modelling filter. The control filter step size is varied based on the secondary path thresholdsignal l dˆ . The modelling filter step size is varied based on error signal f (n) . It is shown that in theproposed method ANC system noise reduction rate and convergence rate are improved dynamically thanthe FxLMS variable step size methods. The computer simulations results indicate effectiveness of theproposed method. |
| Uitgever: |
Academy & Industry Research Collaboration Center (AIRCC) (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 2 van 16 gevonden artikelen
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