中文说明：
通信系统中常用的多进制数字相位调制的源代码，并结合ofdm系统 加入了相应的保护前缀（cp）和导频序列 应用于有关ofdm的信道估计等系统。
English Description：
The source code of M-ary digital phase modulation commonly used in communication system is combined with OFDM system, and the corresponding protection prefix (CP) and pilot sequence are added to OFDM channel estimation system