Adaptive Combination of Proportionate NSAF with the Tap-Weights Feedback for Acoustic Echo Cancellation

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• 作者：Yi Yu ; Haiquan Zhao
• 关键词：Acoustic echo cancellation ; Proportionate normalized subband adaptive filter ; Adaptive combination ; Normalized gradient ; Tap ; weights feedback
• 刊名：Wireless Personal Communications
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：92
• 期：2
• 页码：467-481
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Communications Engineering, Networks; Signal,Image and Speech Processing; Computer Communication Networks;
• 出版者：Springer US
• ISSN：1572-834X
• 卷排序：92

文摘

To obtain fast convergence rate and low steady-state error in acoustic echo cancellation, a convex combination scheme of the improved proportionate normalized subband adaptive filter algorithm is proposed. Instead of the gradient method in the conventional combination theory, the mixing parameter is adapted by using the normalized gradient method which makes it more robust to the variations of subband error signals. Also, to implement a smooth transition from the fast filter to the accurate filter, a cyclic feedback of the overall tap-weights giving to all component filters is applied.