基于DSP＋Builder线性相位滤波器组格型设计与实现

摘要

This paper analyzed the analysis filter and synthesis filter of linear phase perfect reconstruction filter banks (LPPRFB) and researched a design method of LPPRFB,which was the lattice structure. The paper designed lattice structure of two-channel LPPRFB by solving the coefficient. A new design was presented,and designed by use of Dsp Builder tool which combines Matlab/Simulink and Quartus II design tools. The results show that the design was effective.%分析了线性相位完全重构滤波器组（LPPRF）的分析滤波器和综合滤波器．研究了一种线性相位滤波器组设计方法，格型结构。通过求解滤波器组的Lattice系数，进行了两通道线性相位完全重构滤波器组的格型结构设计。提出一种设计方案，利用DSPBuilder技术，将Matlab／simulink设计工具和QuartusII设计工具结合起来。实现有限冲激响应格型滤波器组．并以一个高阶低通FIR格型滤波器组的实现为例，设计并完成软硬件仿真与验证。结果表明，该方法简单易行，能满足设计要求。