低通滤波器的源程序，计算低通阶跃高低阻抗形式，由指标来确定高低阻抗的长度-Source of low-pass filter to calculate the level of resistance in the form of low-pass step by the indicators to determine the length of high and low impedance

低通滤波器，可以很好的实现低通滤波的功能，matlab代码-Low-pass filter can be a good low-pass filtering function, matlab code

对连续三角波进行FM调制与解调。先生成单个三角波，将单个波连成连续波，通过FM调制后通过信噪比为20dB的信道，再通过限幅器和低通滤波器将信号恢复-Continuous triangular wave FM modulation and demodulation. Mr. triangular wave into a single, connected into a single continuous wave waves through FM modulation by the channel