设计两通道FIR QMF滤波器组的快速有效方法

A Simple and Effective Method to Design Two-band FIR QMF Banks

本文结合FIR滤波器的线性相位特点、窗函数的封闭表达式、正交镜像滤波器组的重构理论和传统的迭代算法原理,提出了一种基于窗函数法设计两通道FIRQMF滤波器组的方法。文中给出了算法原理、程序流图,最后通过举例和比较,得出该算法在满足性能指标的情况下,比传统方法更快速有效。

A simple and effective method for the design of two-band quadrature mirror filter （QMF） banks is proposed, which combined with the linear phase of FIR, the closed formulation of window function, reconstruction theory of QMF banks find conventional iterative method. The principle and the flow chart of the new method are given in this text. At last, the conclusion is educed through experiments and comparisons, that the new method is simpler and more effective than conventional method under satisfying the same performances.