FIR滤波器的DSP实现

介绍了FIR滤波器的基本结构及设计方法,结合实例,给定滤波器的数字指标。利用FDATool来确定FIR滤波器抽头系数。基于DSP平台,采用MATLB产生待滤波输入信号导入到用C语言实现的FIR低通滤波器中,并且在CCS上仿真,对仿真结果与理论值进行比较。波形仿真结果和理论值相吻和表明设计的系统是正确、稳定的。不同的应用场合,FIR滤波器要求有不同性能,只要修改本设计中滤波器的系数,就可以实现性能不同的FIR滤波器。

The Realization of FIR Filter on DSP

The architecture of FIR filter and its design method were introduced.With an example the filter digital indexes were given and FIR filter tap coefficients were obtained by FDATool.Based on DSP,the signal being filtered produced by MATLAB was imported into a low pass FIR filter which was implemented by using C language and simulated by CCS.Compared with theoretical value,the simulation results are met,and the design of the system is correct and stable.According to their applications,FIR filters with different performance are usually realized.In their designs different FIR filter can be achieved by changing the tap coefficients.