中文说明：本代码描述了CPM调制的基本原理和流程，通过仿真模拟原始CPM信号，然后按照CPM解调流程，对仿真信号进行解调，对CPM的真个调制解调流程有一个比较好的代码描述。
English Description：
This code describes the basic principle and process of CPM modulation, through the simulation of the original CPM signal, and then according to the CPM demodulation process, the simulation signal is demodulated, there is a better code description of the real CPM modulation and demodulation process.