High precision positioning method based on PPP algorithm as well as system

A high-precision, algorithmic technology, applied in satellite radio beacon positioning systems, radio wave measurement systems, instruments, etc., can solve problems such as lack of positioning algorithms

Pending Publication Date: 2019-12-03
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Therefore, there is a lack of a positioning algorithm in the prior art, which can get rid of the d

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  • High precision positioning method based on PPP algorithm as well as system
  • High precision positioning method based on PPP algorithm as well as system
  • High precision positioning method based on PPP algorithm as well as system

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Embodiment Construction

[0052] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with specific embodiments.

[0053] Embodiments of the present invention provide a high-precision positioning system based on the PPP algorithm, such as figure 1 As shown, it includes: GNSS dual-frequency signal receiving module, which is used to receive GNSS broadcast ephemeris, pseudo-range, non-difference dual-frequency carrier phase and other data;

[0054] The wireless wide area network module is used to obtain GNSS precise orbit corrections and precise clock errors from websites such as IGS or iGMAS through networking;

[0055] The low-orbit navigation enhanced satellite signal receiving module is used to receive the GNSS precise orbit correction and precise clock error sent by the low-orbit navigation enhanced satellite. This module has the same function as the wireless w...

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Abstract

The invention discloses a high precision positioning method based on a PPP algorithm as well as a system and relates to the field of GNSS high precision positioning application. Centimeter-level highprecision positioning can be realized by being independent of a ground positioning base station, only depending on a mobile terminal, utilizing a double frequency GNSS carrier phase and an observed pseudorange value and combining a GNSS precise orbit and clock correction. The system comprises a GNSS double frequency signal receiving module, a wireless wide area network module, a low orbit navigation enhanced satellite signal receiving module and a microprocessor. The positioning method obtains the original pseudorange and carrier phase observation data by adopting GNSS double frequency observation data and GNSS precise correction, then fixes integer ambiguity by utilizing an LAMBDA algorithm and finally performs recursion and convergence on an ionized layer combined observation linear equation by adopting an expansion Kalman filtering equation, thus location information is obtained. The method and system which are disclosed by the invention have the advantages of convenience in use, high reliability and low cost.

Description

technical field [0001] The invention relates to the application field of GNSS high-precision positioning, in particular to a high-precision positioning method and system based on a PPP algorithm. Background technique [0002] With the continuous development of the traditional automobile industry, the user's demand for navigation during driving has become increasingly prominent. Therefore, high-precision navigation has become one of the necessary functions of vehicles, and high-precision positioning will be an important basic condition for this function. In addition, high-precision positioning is also indispensable in the future of unmanned driving. [0003] However, the positioning accuracy of the traditional GNSS system is generally 5 meters to 10 meters. The basic positioning principle is to rely on the distance from the four satellites in space to the receiver, and use geometric methods to calculate the three-dimensional space position of the receiver and the current time...

Claims

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Application Information

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IPC IPC(8): G01S19/44
CPCG01S19/44
Inventor 康国华张琪徐伟证张文豪张晗吴佳奇刘奇弦王强周宏涛刘宗强
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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