| Paper: | DISPS-P2.4 | ||
| Session: | Fast Algorithms | ||
| Time: | Friday, May 21, 09:30 - 11:30 | ||
| Presentation: | Poster | ||
| Topic: | Design and Implementation of Signal Processing Systems: Fast Algorithms | ||
| Title: | COMPLEXITY REDUCTION AND REGULARIZATION OF A FAST AFFINE PROJECTION ALGORITHM FOR OVERSAMPLED SUBBAND ADAPTIVE FILTERS | ||
| Authors: | Edward Chau; Dspfactory Ltd. | ||
| Hamid Sheikhzadeh; Dspfactory Ltd. | |||
| Robert Brennan; Dspfactory Ltd. | |||
| Abstract: | The Affine Projection Algorithm (APA) has been shown to improve the performance of Over-Sampled Subband Adaptive Filters (OS-SAFs) compared to classical Normalized Least Mean Square (NLMS) algorithms. Because of the complexity of APA, however, only low-order APAs are practical for real-time implementation. Thus, in this paper, we propose a reduced-complexity version of the Gauss-Seidel Fast APA (GSFAPA) for adapting the subband filters in OS-SAF systems. We propose modifying the GSFAPA with a complexity reduction method based on partial filter update, and also with a low-cost method for combined regularization and step size control. We show the advantage of the new algorithm -- termed Low-Cost Gauss-Seidel Fast Affine Projection -- compared to the APA in a subband echo canceller application. | ||
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