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Peak constrained least-squares QMF banks

机译:峰值约束最小二乘QMF库

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摘要

This paper presents two peak constrained least-squares quadrature mirror filter (QMF) banks design methods. The proposed design methods minimize the least-squares error of the reconstruction response and the subband filter responses with respect to the ideal responses under the given peak constraints on the reconstruction error ripple and subband filter stopband ripple without explicit specification of the transition-band bandedges of the subband filters. The proposed iterative algorithms converge efficiently in all the simulations, and achieve QMF banks with better performances and lower computational complexities than that obtained by other algorithms in literature. Furthermore, design trade-off among the peak constrained reconstruction error ripple size, subband filter ripple size, and the subband filter transition-band bandwidth of the QMF banks can be obtained from the presented algorithm. Various design examples are presented to illustrate the versatilities of the proposed design methods.
机译:本文提出了两种峰值约束最小二乘正交镜像滤波器(QMF)库设计方法。在没有明确规定过渡带带宽的情况下,在重构误差纹波和子带滤波器阻带纹波的给定峰值约束下,提出的设计方法相对于理想响应,将重构响应和子带滤波器响应的最小二乘误差最小化。子带滤波器。所提出的迭代算法在所有仿真中都有效地收敛,并且获得了比文献中的其他算法更好的性能和更低的计算复杂度的QMF库。此外,可以从提出的算法中获得QMF库的峰值约束重构误差纹波大小,子带滤波器纹波大小和子带滤波器过渡带带宽之间的设计折衷。给出了各种设计示例,以说明所提出的设计方法的通用性。

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