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Time pulse synchronization method in rdss satellite navigation system

A satellite navigation system and time pulse technology, applied to radio-controlled timers, instruments, etc., can solve the problems of poor usability and reliability, mis-synchronization or high probability of mis-synchronization, and achieve the effect of improving the degree of resistance

Active Publication Date: 2015-12-30
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Abstract
  • Description
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Problems solved by technology

The present invention completely solves the problem of poor usability and reliability caused by wrong synchronization or high probability of wrong synchronization in the time pulse synchronization method

Method used

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  • Time pulse synchronization method in rdss satellite navigation system
  • Time pulse synchronization method in rdss satellite navigation system

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Based on the time pulse synchronization method in the RDSS satellite navigation system, the above method obtains delay information by analyzing the navigation information carried by the satellite downlink signal, and samples the local clock with the frame time mark of the downlink signal to calculate the time deviation of the local clock relative to Beidou time , and finally realize the adjusted time pulse output, which is characterized in that it includes the following steps:

[0027] (1) Analyze the satellite downlink signal every minute to obtain the satellite navigation message;

[0028] For the Beidou RDSS satellite navigation system, the broadcast information used for pulse time synchronization is repeated 8 times per minute, and the first 4 times are compared. If the comparison results are consistent, the broadcast information is considered credible, othe...

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Abstract

The invention discloses a time pulse synchronization method based on an RDSS satellite navigation system. According to the method, based on a local clock, time deviation between the local clock and BDT is worked out according to time stamps and deviation adjustment information which are carried by RDSS downlink signals; the time deviation is adjusted to an output local clock overflow flag, and a pulse per second is output at the overflow moment. Because the local clock is adopted as reference in the adjustment process, time synchronization reliability is effectively improved.

Description

technical field [0001] The invention relates to a time pulse synchronization method in an RDSS-based satellite navigation system, especially improving the reliability and effectiveness of the pulse time synchronization. Background technique [0002] At present, based on the time pulse synchronization method in the RDSS satellite navigation system, for the functions of fast time synchronization and prevention of text errors caused by Rayleigh fading in a short period of time, which are somewhat contradictory and may affect the user's use, in It is more difficult to achieve balance. Contents of the invention [0003] The purpose of the present invention is to provide a time pulse synchronization method by reducing the occurrence of wrong synchronization or the probability of wrong synchronization in the time pulse synchronization technology to a certain extent. The invention completely solves the problem of poor usability and reliability caused by wrong synchronization or h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04R20/02
Inventor 杜辉王方崔钊徐宁波张丹赵晨
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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