High-speed maglev train communication system demodulation method based on frequency-phase conversion

The invention discloses a high-speed maglev train communication system demodulation method based on frequency-phase conversion, which comprises the following steps of: firstly, processing a received signal by using a frequency-phase conversion technology, and converting signal frequency differences corresponding to different code elements into signal phase differences; then, a phase discriminator is used for converting difference values on signal phases corresponding to different code elements into difference values on voltages, demodulated signals are input into a sampling detection module, whether demodulation is abnormal or not is judged through comparison of a logic circuit, and a control module is used for controlling a frequency-phase conversion network to modulate the abnormal conditions in time; and demodulation of the CPFSK signal of the high-speed maglev train-ground communication system is completed. The method provided by the invention realizes the automation of CPFSK demodulation and detection ad