程序实现用脉冲响应不变法和双线性变换法设计IIR滤波器，包括低通滤波器和高通滤波器，其中采样点N=1600，采样频率Fs=10000.-The same impulse response and bilinear transform IIR filter design, including low-pass filter and a high pass filter, where sampling points N = 1600, the sampling frequency Fs = 1000