GPS simulation method and system based on positioning and time service of Beidou satellite
A Beidou satellite and Beidou timing technology, applied in the field of satellite navigation, can solve problems such as direct replacement of GPS receivers, achieve the effects of improving safety and reliability, reducing the difficulty of replacement, and realizing time synchronization
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[0024] A GPS simulation method based on Beidou satellite positioning and timing service, comprising the steps of:
[0025] Step 1. The Beidou timing receiver receives the Beidou satellite navigation signal, obtains timing information and positioning information through signal down-conversion, DA conversion, despreading, decoding, time extraction, etc., and outputs information such as pps second pulse, TOD and position.
[0026] Step 2, use the timing information obtained in step 1 to tame the local clock, that is, the local crystal oscillator, to realize the time synchronization between the voltage-controlled crystal oscillator and the Beidou system.
[0027] Step 3, using the timing information obtained in step 1 and the time parameters in the Beidou ephemeris to convert Beidou time into GPS time, and synchronously generate GPS analog signals.
[0028] Step 4, under the control of the local clock obtained in step 2, use the positioning information obtained in step 1 and the G...
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