说明：  刚才不小心上传了两个ask调制程序，不好意思。这是ask的解调程序，基于matlab的通信系统仿真系列。供刚接触到matlab的朋友使用。
(just careless upload ask the two modulation procedure, sorry. This is ask the demodulation process, Matlab-based communications system simulation series. For begin to use Matlab friends.)