中文说明：
本程序采用16QAM调制方式，对一串2进制信源进行调制，采用（7，4）循环码对信源做信道编码，用升余弦滚降函数进行基带调制，再调到高频信道；在信道上加入高斯白噪声，运用匹配滤波器解调，画出解调星座图，运用最小欧氏距离译码判决，再对信号进行信道解码，画出采用信道编码技术和不采用信道编码技术的误比特率图。
English Description：
This program uses 16QAM modulation mode to modulate a series of binary sources, uses (7,4) cyclic code to encode the source, uses raised cosine roll off function for baseband modulation, and then adjusts to high-frequency channel; Add Gaussian white noise to the channel, use matched filter demodulation, draw the demodulation constellation, use the minimum Euclidean distance decoding decision, then decode the signal, and draw the bit error rate diagram with and without channel coding technology