中文说明：
利用Matlab仿真软件，完成如图1所示的一个基本的数字通信系统。信号源产生0、1等概分布的随机信号，映射到16QAM的星座图上，同时一路信号已经被分成了实部和虚部，后边的处理建立在这两路信号的基础上。实部、虚部信号分别经过平方根升余弦滤波器，再加入高斯白噪声，然后通过匹配滤波器（平方根升余弦滤波器）。最后经过采样，判决，得到0、1信号，同原信号进行比较，给出16QAM数字系统的误码。
English Description：
Using MATLAB simulation software, a basic digital communication system as shown in Figure 1 is completed. The signal source generates random signals with probability distribution of 0 and 1, which are mapped to the constellation of 16QAM. At the same time, one signal has been divided into real part and imaginary part, and the latter processing is based on these two signals. The real part and imaginary part of the signal pass through the square root raised cosine filter respectively, and then pass through the matching filter (square root raised cosine filter). Finally, through sampling and decision, 0 and 1 signals are obtained. Compared with the original signal, the error code of 16QAM digital system is given.