For improving the baud rate of system, this text adopts the GMSK (Gauss ian Filtered Minimum Shift Keying) modulation method to replace ASK (Amplitude Shift Keying) modulation method of current IFCNSS.

• 为提高系统的传输速率,本文采用GMSK(Gaussian Filtered Minimum Shift Keying高斯滤波最小频移键控)调制方式来代替目前“安全通信网”中的ASK(Amplitude Shift Keying幅移键控)调制方式。