加权极大极小正交镜滤波器设计的新方法

Proceedings of the Sixth International Symposium on Signal Processing and its Applications (Cat.No.01EX467) Pub Date : 1900-01-01 DOI:10.1109/ISSPA.2001.949768

A. P. Vinod, A. Premkumar, C. Lau

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引用次数: 2

摘要

加权最小二乘(WLS)算法被广泛应用于频域正交镜像滤波器的设计。据报道，WLS设计的等纹特性及其在滤波器带边缘附近的性能优于最小二乘(LS)设计。已知这些设计技术在不同的阻带频率下存在通带异常。提出了一种消除LS设计中的通带异常的算法。在本文中，我们证明了WLS可以以类似于LS设计的方式进行修改。所得滤波器的特性满足阻带要求，在通带区域不显示异常。

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Novel approach to the design of weighted minimax quadrature mirror filters

The weighted least squares (WLS) algorithm is widely employed for designing quadrature mirror filters (QMF) in the frequency domain. The equiripple nature of the WLS design and its performance near the filter band edge have been reported to be better than that of the least squares (LS) design. It is known that these design techniques suffer from pass-band anomaly under different stop band frequencies. We have proposed an algorithm to eliminate pass-band anomaly of LS design. In this paper, we show that WLS can be modified in way similar to that proposed for the LS design. The characteristics of the resulting filters satisfy the stop band requirements and do not show anomaly in the pass band region.

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Proceedings of the Sixth International Symposium on Signal Processing and its Applications (Cat.No.01EX467)

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