FSK调制VHDL源程序： --文件名：PL_FSK --功能：基于VHDL硬件描述语言，对基带信号进行FSK调制 -FSK modulation VHDL source code:- File name: PL_FSK- Function: Based on the VHDL hardware descr iption language, the baseband signal FSK modulation

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.)