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Method and receiving device for overcoming GPS/Big Dipper satellite period number zero returning

A zero return, Beidou technology, applied in the field of overcoming GPS/Beidou week number return to zero, can solve problems such as timing errors

Active Publication Date: 2021-01-15
BEIJING INST OF ELECTRONICS SYST ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since there is no information about the number of weeks returned to zero in the message broadcast by the satellite, GPS / Beidou receiving equipment uses a fixed number of weeks returned to zero, which will cause timing errors when the actual number of weeks returned to zero changes

Method used

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  • Method and receiving device for overcoming GPS/Big Dipper satellite period number zero returning
  • Method and receiving device for overcoming GPS/Big Dipper satellite period number zero returning

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, a method to overcome the GPS / Beidou week number return to zero, including:

[0030] S1. Store the week count value and the number of days of the week according to the last received navigation message ephemeris parameters;

[0031] S3, initialize the number of days of the week, and store it;

[0032] The initialization value is determined according to the time difference between the UTC time when the week number returned to zero last time and the UTC time when the week number returned to zero last time, and the corresponding GPS time or the UTC time of the Beidou time start epoch.

[0033] In one example, the origin of GPS time is 0:00 on January 6, 1980 (Sunday) in UTC time, and the first GPS week number return event occurred at 0:00 on August 22, 1999 in UTC time. New The return of the week number to zero occurred at 00:00 on April 7, 2019. For the GPS receiving device, the stored week number will be reset to 1 between 00:00 on August 22, ...

Embodiment 2

[0039] A week counting device for overcoming the return of GPS / Beidou week number to zero, comprising: a receiving unit, a storage unit, a comparison unit and a control unit, wherein the receiving unit is used to receive the navigation message ephemeris parameters from satellites;

[0040] The storage unit is used to store the number of days of the week and the value of the week count;

[0041] The control unit is used to control the initialization of the number of days of the week, and store it in the storage unit;

[0042] The comparison unit is used to compare the "week number" in the navigation message ephemeris parameter with the stored week count value;

[0043] The control unit controls the countdown times of the week number in the storage unit and the update of the stored week count value.

[0044] The device also includes a power supply unit.

Embodiment 3

[0046] A computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the method described in Embodiment 1 is implemented.

[0047] In practical applications, the computer-readable storage medium may use any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination thereof. More specific examples (non-exhaustive list) of computer readable storage media include: electrical connections with one or more leads, portable computer disks, hard disks, random access memory (RAM), read only memory (ROM), Erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM)...

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Abstract

The embodiment of the invention discloses a method for overcoming GPS / Big Dipper star period number zero returning and a receiving device, and the method is characterized in that the method comprisesthe steps: S1, storing a week count value and week number zero returning times according to a navigation message ephemeris parameter received last time; S3, initializing a week number anti-zero frequency and storing the week number anti-zero frequency; S5, receiving latest navigation message ephemeris parameters from a satellite, comparing the week number in the navigation message ephemeris parameters with a stored week count value, and if the week number is less than the stored week count value, adding 1 to the stored week number zero returning frequency; S7, updating the stored week count value into the week count in the navigation message ephemeris parameter.

Description

[0001] The invention relates to the field of satellite communication. More specifically, it relates to a method, a receiving device, a storage medium and a computer device for overcoming the zero return of the GPS / Beidou week number. Background technique [0002] Both GPS time and Beidou time signals and message formats are continuous time systems dedicated to their satellite systems and based on atomic time. The time is usually expressed by a combination of the seconds in the week, the count of the week (week number), and the number of times the week number returns to zero. The second of the week gradually increases from 0 every Saturday at midnight UTC time, and returns to 0 after a week (604800s), and at the same time the number of weeks increases by 1; the number of weeks accumulates to the corresponding maximum value (GPS: 1023, Beidou : 8191), when returning to zero, the number of weeks returning to zero will increase by 1. Among them, the second and week counts in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/38H04B7/185
CPCH04B1/38H04B7/185Y02D30/70
Inventor 陈峰刘芊高文龙刘泽轩刘强
Owner BEIJING INST OF ELECTRONICS SYST ENG