基于ARM的上下频率可调FIR滤波器设计与仿真

Design and emulation of FIR filter about adjustable edged frequency on ARM

在脑电信号的检测处理过程中,信号滤波是重要工作之一。结合ARM及软件仿真的特点,提出一种综合使用MATLAB和EVC软件在ARM上实现上下频率可调FIR滤波器的设计方法。先用MATLAB软件设计出满足性能要求的滤波器参数,然后在ARM中进行滤波算法的C++语言编程,再在EVC软件中进行仿真实验。实验结果表明,该滤波器各项性能良好,对实际系统设计具有较好参考意义,能够满足脑电信号采集系统信号预处理的要求。

In the process of detecting the EEG signals,one part of the important work is filtering.Based on the characteristics of the ARM and software simulation,this paper puts forward a design method about using comprehensively MATLAB and EVC software to realize FIR filter about the adjustable frequency in the ARM.Firstly,the filter parameters which meet the performance requirements are designed by MATLAB software.Then filter algorithm using C＋＋ programming language is worked in the ARM.Finally,the simulation is realized in the EVC.The simulation results show that the various performance of the filter are well,which has a good reference meaning to the actual system design and meets the signal preprocessing requirements of EEG acquisition system.