初始化调制器，解调器，AWGNChannel，和错误率测量系统的对象。定义模拟值对于未编码的Eb / No比，并设置模拟停止标准的RS编码与擦除，穿刺术，和缩短的例子。-Initialize modulator, demodulator, AWGNChannel, and error rate measurement System objects. Define simulation value for uncoded Eb/No　ratio, and set simulation stop criteria for the RS coding examples with erasures, punctures, and shortening.