A Variable Step-Size Normalized Subband Adaptive Filter With a Step-Size Scaler Against Impulsive Measurement Noise
A Variable Step-Size Normalized Subband Adaptive Filter With a Step-Size Scaler Against Impulsive Measurement Noise
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DOI：
10.1109/tcsii.2016.2606113
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发表时间：
2017-07
期刊：
影响因子：
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通讯作者：
Junwoong Hur;Insun Song;P. Park
中科院分区：
文献类型：
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作者：
Junwoong Hur;Insun Song;P. Park
本文介绍了一种基于变步长（VSS）的归一化子带自适应滤波器（NSAF），该滤波器采用步长缩放器来提高对脉冲测量噪声的鲁棒性。当脉冲测量噪声出现时，通过步长缩放器减小了所提出的变结构NSAF的步长，适合于NSAF的应用。这消除了基于由于脉冲测量噪声引起的子带输出误差的缺陷信息来更新权重估计的可能性。在建议的VSS NSAF，更新步长的方程构造通过解释的行为的均方差的传统NSAF和应用步长缩放。步长缩放器利用子带输出误差之和，这可能受到脉冲测量噪声的影响。仿真结果表明，在脉冲噪声环境下，该方法具有良好的瞬态和稳态性能。
This brief introduces a variable step-size (VSS) normalized subband adaptive filter (NSAF) using a step-size scaler to improve the robustness against impulsive measurement noise. When impulsive measurement noise appears, the step size of the proposed VSS NSAF is scaled down by the step-size scaler, which is suitable for application in the NSAF. This removes a possibility of updating weight estimates based on defective information of the subband output errors due to impulsive measurement noise. In the proposed VSS NSAF, the equations for updating the step size are constructed by interpreting the behavior of the mean square deviation of the conventional NSAF and applying the step-size scaler. The step-size scaler utilizes the sum of the subband output errors, which can be influenced by impulsive measurement noise. Simulations using the proposed VSS NSAF show an excellent transient and steady-state behavior with colored input in impulsive-noise environments.