The system adopts FSK modulation way to carry out directly digital signal of axle tempratureand transmit to the receiving system of test train.
系统采用移频键控（FSK）调制方式，对轴温数字信号进行处理并发射，上传给便携式模拟接车系统。
The paper uses MATLAB to simulate ASK, FSK, PSK modulation of digital signal and spectrum analysis.
运用MATLAB语言模拟实现了数字信号的ASK、FSK、PSK调制与频谱分析。
Digital mod technology in the digital communication occupies a very important position, commonly used digital modulation are: frequency shift keying (FSK) and phase-shift keying (PSK), and so on.
数字调制解调技术在数字通信中占有非常重要的地位，常用的数字调制有：移频键控(FSK)和移相键控(PS K)等。
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