谱相关算法，根据理解编写的。要求必须用老版，2008前的matlab，否则dmod函数报错。-Spectral correlation algorithm, according to the understanding of the preparation of. Requirements must be used in the old version, 2008 before the MATLAB, or DMOD function error.

Obsolete modulation fuction for matlab communications toolbox. It needs the ddmod function for demodulation.

主要为matlab 2010 之前更改的dmod函数，用于ask，fsk，psk等数字信号的调制。(It is mainly DMOD function changed before matlab 2010, which is used for the modulation of ask, FSK, PSK and other digital signals.)