IIR滤波器的DSP实现

IIR滤波器用较少阶数就获得较高的频率选择特性。根据滤波器的技术指标,采用FDATool工具来设计阶数最小的滤波器,导出滤波器的抽头系数;然后用DSP汇编语言编程,实现IIR算法;用MATLAB产生合成输入信号,导入滤波系统;最后,用CCS软件观察滤波前后的波形变化。波形仿真结果和理论值相吻合。

The Realization of IIR Filter on DSP

IIR filter can use less order number for high frequency selective characteristic. Given filter technology index to design order number minimum filter with FDATool; Export filter coefficient, and then use assemble language programming of DSP to realize IIR algorithms; Import filtering system with synthetic input signal produced by MATLAB, and before and after filtering observe waveform change with CCS software. The simulation results and theoretical value are meeting and, the filter designed meets the expected effect.