中文说明：
不用matlab里面的函数，自己写出来的2ASK的仿真程序，加入了白噪声，经过滤波后的波形有些变形，可能是滤波器的原因。仅供参考。
English Description：
Without the functions in MATLAB, the 2ASK simulation program written by myself is added with white noise. The filtered waveform is somewhat deformed, which may be the reason for the filter. For reference only