中文说明：
除了计算不同级别QAM的SER与Eb/No的比值外，m文件还显示了接近香农的4QAM、16QAM、64QAM、256QAM和1024QAM信道容量限制所需的编码增益。m文件末尾给出了注释。
English Description：
In addition to calculating the ratio of ser to EB / no of different levels of QAM, the m file also shows the coding gain required to approach Shannon's 4QAM, 16QAM, 64QAM, 256qam and 1024qam channel capacity limit. Notes are given at the end of the m file