Multichannel time service fitting method based on BeiDou satellite

Abstract

The invention discloses a multichannel time service fitting method based on the BeiDou satellite. The method comprises the following steps: (1) a satellite message integrity monitoring unit is used to perform satellite message integrity judgment according to the single-channel message information replay characteristic and the time information comparison result among multiple channels to reject abnormal message information; (2) the fault-tolerance process is performed on a satellite time scale signal in a satellite time scale fault-tolerance process unit; and the correction process is performed on satellite time delay information in a satellite time delay fitting correction unit; (3) the processed satellite time scale signal and the processed satellite time delay information are sent to a local clock correction fusion unit, wherein the local clock correction fusion unit is used to perform fusion process on local clock correction of all channels to make the local time scale and the satellite system time scale synchronous so as to acquire the satellite time service signal. According to the invention, integrity and fusion processes are performed on the satellite message, the satellite time scale data, the satellite time delay correction information and the local clock correction through an original fusion processing method, so the stability and accuracy of the multichannel time service receiver time service performance can be effectively improved, and the receiver time service performance can be improved.

Description

technical field [0001] The invention relates to a method for fitting multi-channel timing information in the "Beidou No. 1" and "Beidou No. 2" satellite navigation systems. Background technique [0002] At present, there are many timing receivers based on the "Beidou-1" satellite navigation system in China. These receivers are usually multi-channel receivers. However, when performing timing processing, multi-channel satellite signals are usually received. Timing, or multi-channel information fitting processing for timing, but the fitting method is relatively simple, when the received satellite signal is degraded or the received satellite signal is switched, the timing performance of the receiver will be deteriorated. With the continuous improvement of the "Beidou-1" and "Beidou-2" satellite navigation systems, the number of satellites launched will increase, and the number of receiving channels of the receiver will increase, so the channel fitting problem becomes more import...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many timing receivers based on the "Beidou-1" satellite navigation system in China. These receivers are usually multi-channel receivers. However, when performing timing processing, multi-channel satellite signals are usually received. Timing, or multi-channel information fitting processing for timing, but the fitting method is relatively simple, when the received satellite signal is degraded or the received satellite signal is switched, it will cause the timing performance of the receiver to deteriorate

Images