多通道过采样翘曲余弦调制滤波器组的实用设计
Practical design of multi-channel oversampled warped cosine-modulated filter banks
摘要：
提出了一种多通道过采样翘曲余弦调制滤波器组（CMFB）的优化设计方法。通过对均匀CMFB进行全通变换，得到了弯曲CMFB。本文研究了滤波器组通道信号过采样引起的幅度失真最小化和混叠分量抑制问题。所提出的基于优化的设计大大降低了整体滤波器组传递函数的失真，同时考虑到通道子采样率。所提出的翘曲CMFB设计方法的Matlab实现可在公共GitHub存储库中获得。
英文摘要：
A practical approach to optimal design of multichannel oversampled warped cosine-modulated filter banks (CMFB) is proposed. Warped CMFB is obtained by allpass transformation of uniform CMFB. The paper addresses the problems of minimization amplitude distortion and suppression of aliasing components emerged due to oversampling of filter bank channel signals. Proposed optimization-based design considerably reduces distortions of overall filter bank transfer function taking into account channel subsampling ratios. Matlab-implementation of the proposed warped CMFB design method is available in public GitHub repository.
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