Pseudo code phase modulation-linear frequency modulation time division low orbit navigation signal generation method and device

The invention relates to a pseudo code phase modulation-linear frequency modulation time-division low-orbit navigation signal generation method and a pseudo code phase modulation-linear frequency modulation time-division low-orbit navigation signal generation device. The method comprises the following steps: constructing a time-division evolvable low-orbit satellite navigation signal frame structure based on pseudo code phase modulation-linear frequency modulation; the frame structure is composed of continuous signal frames, each signal frame comprises a synchronous waveform and a fine following waveform, the carrier frequency of a modulation carrier of the synchronous waveform is periodically changed, a modulation pseudo code adopts pseudo code phase modulation, and a multiple access mode adopts code division multiple access and/or pseudo code phase multiple access; the fine following waveform is obtained through spread spectrum modulation, a synchronous waveform and the fine following waveform are generated