基于MATLAB的PR QMF滤波器组设计

Design of Perfect Reconstruction Qadrature Mirror Filter Bank Based on MATLAB

本文从信号处理的角度分析了两通道标准重建正交镜像滤波器(PRQMF)组理论,说明了设计PRQMF滤波器组具有一定困难性。给出了使用MATLAB语言进行程序设计和滤波器组特性分析的相关内容。利用MATLAB设计滤波器组快捷简单、极大的减少了工作量,说明了MATLAB语言功能之强的。由大量仿真得到了PRQMF滤波器组的最佳参数(阶数N和通带截至频率w),更是能节约学习者和设计者的时间。

This paper analyses the theory of two-channel perfect reconstruction quadrature mirror filter banks （PR QMFB）, explicates the difficulty in designing filters.lt also introduces a method based on MATLAB language to design PR QMFB effectively and something about filter visualization, shows the performance of MATLAB, and receives the best parameters （filter order and passband edge） by simulation.Using this method, it reduces a lot of computation practically to design filters,can saves learners and designers＇ breath.