中文说明：
说明： 熟悉OQPSK的基本原理、调制解调技术，掌握MATLAB中M文件的使用及相关函数的调用方法。先在 matlab 中创建一个数字基带信号，然后在 matlab 中创建相应的基带信号调制函数，然后分析调制信号的波形，记录解调后调制信号的结果，观察解调结果和记录，最后在信号中加入噪声，观察时频图的变化。
English Description：
The goal of this design is to deeply understand the basic principle of OQPSk modulation and demodulation, learn how to use MATLAB software in the M file to realize OQPSk modulation and demodulation analysis and join the influence of different noise on the signal, the first to create a digital baseband signal and then the corresponding function in MATLAB the baseband signal modulation, and then analyses the waveform of the modulated, record the results of modulated signals after demodulation, observe the demodulation results and record, finally adding noise in the signal and then observe the changes of the time-frequency diagram