基于DSP+Builder线性相位滤波器组格型设计与实现

Design and realization of the lattice filter banks using DSP builder

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DSP Builder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。

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.