The Research Of FSK Signal Inspection System

In the urban rail transportation, the density of trains traveling is heavy, and the interval between trains is short, and the FSK signal plays more important role in the train's safe running insurance. How to inspect the signal accurately in teal time is a question for discussion.The paper emphasizes to analyze the FSK signal in frequency spectrum field. According to the characteristic of the FSK signal, comparing the signal process methods between anolog and digital, we finally chose the Digital Signal Processing to analyze FSK signal. I designed the hardware of the system according to the project, finished the design of communication protocol during the data transmission, and achieve to the storage and display of the data.The result of the test has shown that the system could analyze the FSK signal in real time, and it has met the demand of design.