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Precise positioning method through combination of single-frequency GPS and GLONASS and system thereof

A precise positioning, single-frequency technology, used in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices and other directions, which can solve the problems of different coordinate systems and different time standards.

Inactive Publication Date: 2014-01-22
上海映慧电子科技有限公司 +1
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Problems solved by technology

[0004] 2. Different coordinate systems
[0005] 3. Different time standards
However, the existing technology cannot realize the precise positioning of the combination of GPS and GLONASS.

Method used

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  • Precise positioning method through combination of single-frequency GPS and GLONASS and system thereof
  • Precise positioning method through combination of single-frequency GPS and GLONASS and system thereof
  • Precise positioning method through combination of single-frequency GPS and GLONASS and system thereof

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Embodiment Construction

[0103] see figure 1 , figure 1 It is a flow chart of the method of the present invention. A method for precise positioning using single-frequency GPS and GLONASS combination of the present invention comprises the following steps:

[0104] Step S1 of establishing a reference station and a mobile station, the positioning modules of the reference station and the mobile station include a single-frequency GPS chip and a single-frequency GLONASS chip;

[0105] Step S2 of reading the broadcast ephemeris output by the GPS chip and the GLONASS chip respectively by the base station and the mobile station;

[0106] Step S3 in which the base station and the mobile station perform time synchronization between the GLONASS system and the GPS system respectively;

[0107] The base station and the mobile station respectively calculate the step S4 of the satellite positions of GPS and GLONASS according to the broadcast ephemeris of respective GPS and GLONASS chips;

[0108] Step S5 of readi...

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Abstract

The invention discloses a precise positioning method through combination of a single-frequency GPS and GLONASS and a device thereof. The method includes: establishing a base station and a mobile station, wherein a positioning module includes a single-frequency GPS chip and a single-frequency GLONASS chip. The base station and the mobile station reading broadcast ephemerises output by positioning modules of the base station and the mobile station respectively; the base station and the mobile station carrying out time synchronization on a GLONASS and a GPS respectively; the base station and the mobile station calculating satellite positions of the GPS and the GLONASS respectively according to the ephemerises of the positioning modules of the base station and the mobile station; the mobile station and the base station reading original pseudo-range data respectively; the base station calculating a pseudo-range difference correction number of the base station according to the position of the base station, the acquired satellite positions of the GPS and the read GLONASS and the read original pseudo-range data output by the GPS and the GLONASS chip; and the mobile station calculating a positioning result through adoption of a Kalman filtering method according to the acquired satellite positions, read original pseudo-range phase data output by the GPS and the GLONASS chips and the pseudo-range difference correction number obtained from the base station. Therefore, calculation is stable and positioning is accurate.

Description

technical field [0001] The invention relates to a positioning method, in particular to a method and a system for precise positioning using a combination of single-frequency GPS and GLONASS. Background technique [0002] GPS is the global positioning system of the United States, and GLONASS is a satellite navigation system developed by Russia, although both are global satellite navigation systems. But in terms of technology, GLONASS differs from GPS in the following points: [0003] 1. The frequency of satellite transmission is different. The GPS satellite signal adopts the code division multiple access system. The signal frequency and modulation mode of each satellite are the same, and the signals of different satellites are distinguished by different pseudo codes. GLONASS adopts the frequency division multiple access system, and the satellites are distinguished by different frequencies, and the pseudo-random codes of each group of frequencies are the same. For this reaso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/33G01S19/35
CPCG01S19/33G01S19/07G01S19/37G01S19/48
Inventor 张云符锡金
Owner 上海映慧电子科技有限公司
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