FIR滤波器， 设计一个线性相位有限冲激响应低通滤波器，使其满足如下指标：通带边界为2kHz，阻带边界为2.5kHz，通带波纹 =0.005，阻带波纹 =0.005，抽样率为10kHz。采用多尔夫-切比雪夫窗进行设计，进行频谱分析。-FIR filter, design a linear phase FIR low-pass filter to meet the following indicators: passband border to 2kHz, stopband border to 2

切比雪夫2型原型模拟滤波器幅频响应曲线，阶数为2,4,6,8-Chebyshev type 2 prototype analog filter amplitude-frequency response curve

巴特沃思，切比雪夫1型，椭圆模拟滤波器原型的设计代码，每一种滤波器的幅频响应响应曲线-Butterworth, chebyshev type 1, elliptical analog filter prototype design code, the amplitude frequency response of each kind of filter response curve