基于DSP的FIR数字滤波器设计及实现

Design and Accomplishment of Digital FIR Filters Based on DSP

简述FIR数字滤波器的结构和特点,及其在DSP上实现的过程。首先使用MATLAB设计一个FIR低通滤波器系数,然后利用filter（）函数进行仿真,最后对一个混合信号用TMS320LF2407芯片实现低通滤波处理。本文所编写的滤波器汇编程序,具有简洁,生成的代码少,执行效率高等优点。实验结果表明,所设计的FIR滤波器能达到预期效果。

The paper briefly describes the structure and features of digital FIR filters and the accomplishment process on DSP.It firstly uses MATLAB to design a coefficient of a low-pass filter and then employs the function filter（）to emulate,and lastly uses a TMS320LF2407 chip to accomplish the lowpass FIR filter by means of filtering a composite signal.The FIR assembly program presented in this paper is concise and highly efficient with few codes generated.Experiment results show that the design FIR filter can live up to the expectations.