Delayless Individual-Weighting-Factors Sign Subband Adaptive Filter With Band-Dependent Variable Step-Sizes
Delayless Individual-Weighting-Factors Sign Subband Adaptive Filter With Band-Dependent Variable Step-Sizes
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DOI：
10.1109/taslp.2017.2699325
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发表时间：
2017-07
期刊：
影响因子：
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通讯作者：
Jung-Hee Kim;Jin Kim;Jae Hyeon Jeon;S. Nam
中科院分区：
文献类型：
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作者：
Jung-Hee Kim;Jin Kim;Jae Hyeon Jeon;S. Nam
为了充分利用子带自适应滤波器的解相关特性，提高算法在脉冲噪声环境下的收敛性能，提出了一种基于独立加权因子的符号子带自适应滤波算法（IWF SSAF）。然而，这样的符号子带自适应滤波器（SSAF）算法对于实时应用可能具有固有的信号路径延迟问题，并且因此可以被限制性地应用。在本文中，一个无延迟的IWF-SSAF与频带相关的可变步长（BD-VSS），鲁棒的脉冲噪声环境中，提出了实时应用，从而两个无延迟滤波器结构开发的$\ell_2 $-norm为基础的SAF沿着与IWF-SSAF。特别是，BD-VSS算法也引入了更好的收敛性，通过应用最近的$\ell_1 $-范数最小化技术，以各自的子带。最后，所提出的无延迟IWF-SSAF与BD-VSS的性能进行了验证，在各种脉冲干扰环境中，如系统识别与脉冲噪声，声学回声消除在一个双通话的情况下，和主动脉冲噪声控制。
Sign subband adaptive filter algorithms with individual weighting factors (IWF-SSAF) were recently proposed to achieve improved convergence performance in impulsive noise environments by fully utilizing the decorrelating property of subband adaptive filters. However, such sign subband adaptive filter (SSAF) algorithms may have an inherent signal path delay problem for real-time applications, and thus, can be restrictively applied. In this paper, a delayless IWF-SSAF with band-dependent variable step-sizes (BD-VSS), robust in impulsive noise environments, is proposed for real-time applications, whereby two delayless filter structures developed for the $\ell _2$-norm-based SAF are employed along with the IWF-SSAF. In particular, a BD-VSS algorithm is also introduced for better convergence by applying the recent $\ell _1$-norm minimization technique to respective subband. Finally, the performance of the proposed delayless IWF-SSAF with BD-VSS is verified in various impulsive interference environments such as system identification with impulsive noise, acoustic echo cancellation in a double-talk scenario, and active impulsive noise control.