说明：  在MATLAB simulink中搭建MSK调制解调模型，码元速率可以调整，可以增加信道模型也观察信噪比与误码率之间的关系，scope观察解调结果。
(MSK modem built in MATLAB simulink model, the symbol rate can be adjusted to increase the channel model can also observe the relationship between SNR and BER, scope observation demodulation result.)