中文说明：程序中对随机信号(伪随机序列产生）进行16QAM调制，自己编写的调制函数，让后加上高斯白噪声后解调，仿真后得到星座图及解调后的误码率、误比特率曲线。
English Description：
In the program, the random signal (generated by pseudo-random sequence) is modulated by 16QAM, and the modulation function written by ourselves is demodulated after adding Gaussian white noise. After simulation, the constellation diagram and the bit error rate and bit error rate curve after demodulation are obtained.