کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
469698 | 698344 | 2007 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Approximated affine projection algorithm for feedback cancellation in hearing aids Approximated affine projection algorithm for feedback cancellation in hearing aids](/preview/png/469698.png)
We propose an approximated affine projection (AP) algorithm for feedback cancellation in hearing aids. It is based on the conventional approach using the Gauss–Seidel (GS) iteration, but provides more stable convergence behaviour even with small step sizes. In the proposed algorithm, a residue of the weighted error vector, instead of the current error sample, is used to provide stable convergence. A new learning rate control scheme is also applied to the proposed algorithm to prevent signal cancellation and system instability. The new scheme determines step size in proportion to the prediction factor of the input, so that adaptation is inhibited whenever tone-like signals are present in the input. Simulation results verified the efficiency of the proposed algorithm.
Journal: Computer Methods and Programs in Biomedicine - Volume 87, Issue 3, September 2007, Pages 254–261