基于CCS软件的IIR滤波器实验设计

Experimental design of IIR filter based on CCS software

借助CCS软件完成了IIR滤波器实验设计,主要设计工作包括输入序列x(n)设计、求解系统函数H(z)的程序设计和求解常系数差分方程的程序设计。首先,通过输入序列x(n)设计和系统函数H(z)设计,求出x(n)和常系数差分方程的系数;其次,调用递推方法求解常系数差分方程的子程序,计算IIR滤波器的输出序列y(n)。借助time/frequency选单观察y(n)的时域波形和频谱。

The experiment of the IIR filter is designed by using the CCS software ,which mainly include the input sequence x（n） design ,the program design of solving the system function H（z） and the program design of solving constant coefficient difference equation .First by designing the input sequence x（n） and the system function H（z） ,the value of the x（n） and the coefficient of the difference equation are calculated;secondly ,the output sequence y （n） of the IIR filter is calculated by using the program of solving constant coefficient difference equation by the recursive method .The time domain waveform and the spectrum of the y（n） are observed by the time/frequency menu .