说明：  用随机数发生器产生二进制序列，他作为FSK调制器的输入。FSK调制器的输出受到概率a的加性高斯噪声污染，仿真得出系统的误码率。
( Has the binary sequence with the random number generator, he takes FSK modulator s input. The FSK modulator s output receives probability the Canada Gauss noise pollution, the simulation obtains system s error rate. )