说明：  MFSK调制VHDL程序及仿真文件名：PL_MFSK --功能：基于VHDL硬件描述语言，完成对基带信号的MFSK调制 --说明：这里MFSK的M为4
(MFSK modulation VHDL simulation procedures and the file name: PL_MFSK- features: Based on the VHDL hardware description language, completion of the base-band signal MFSK modulation- Description: Here MFSK of M 4)