| Autor: |
Khong, Andy W. H., Naylor, Patrick A. |
| Předmět: |
|
| Zdroj: |
IEEE Signal Processing Letters; Apr2005, Vol. 12 Issue 4, p269-272, 4p, 1 Diagram, 2 Charts, 4 Graphs |
| Abstrakt: |
We investigate stereophonic acoustic echo cancellation in which solutions for the system can be nonunique and propose the use of selective-tap adaptive filters to address this problem. The main concept is to employ tap selection to optimize jointly for minimum interchannel coherence and maximum L2-norm of the subselected tap-input vectors. The exclusive maximum (XM) tap-selection approach is proposed and applied to normalized least-mean squares (NLMS) and recursive least-squares (RLS) algorithm. We propose an approach for solving the nonuniqueness problem employing XM tap selection in combination with a nonlinear preprocessor. Simulation results show a significant improvement in convergence rate compared with existing techniques. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
