BPM short-wave data modulation design method based on Chirp signal

The invention provides a BPM short-wave data modulation design method based on a Chirp signal, which combines the Chirp signal and MFSK to form a multi-ary Chirp signal center frequency keying (MCFSK)mode, thereby not only retaining the advantages of MFSK, but also further improving the ability of system data transmission to resist short-wave channel interference. In addition, MCFSK is cascaded with binary Chirp-rate keying to form MCFSK-2CrSK modulation, which can improve the system data transmission rate without changing the MCFSK modulation signal parameters. The invention may be compatible with the existing BPM short-wave timing system without affecting the use of the original system user. The data modulation signal provided by the invention has the advantages of good anti-multipath fading and anti-Doppler frequency shift, is suitable for the short-wave channel, and may be flexibly designed for channel characteristics and synchronization accuracy of the receiving terminal. 本发明提供了种基于Chirp信号的BPM短波数据调制设计方法，将