基于MATLAB和DSP的数字滤波器设计

Design of Digital Filter Based on MATLAB and DSP

介绍了有限冲激响应(FIR,Finite Impulse Response)数字滤波器的原理以及如何根据给定的技术指标设计所需的FIR数字滤波器。运用MATLAB软件提供的滤波器设计工具FDATool得到滤波器的系数,在CCS集成开发环境下,完成了线性移位缓冲区法的FIR滤波器的软件仿真。仿真结果表明:滤波器达到了给定的技术指标。基于MATLAB和CCS设计FIR滤波器的方法,可以快速地改变滤波器的参数,方便地对DSP(Digital Signal Processing)进行软件调试,极大地缩短了DSP的开发周期,提高了DSP的开发效率。

This paper introduces the principle of FIR digital filter and how to design the desired FIR digital filters in accordance with the given technical specifications.The filter coefficients are obtained by FDATool in MATLAB software and software simulation of FIR filter based on the linear shift buffer method is completed in the CCS IDE.The simulation results show that：the design of filter reaches the given Technical indicators.The FIR filter design methods based on MATLAB and CCS,which can quickly change parameters of the filter and easily do the debugging of DSP software,greatly shortens the development cycle of DSP and improves the efficiency of the DSP development.