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Elastic enhanced GNSS pseudo code tracking method for improving pseudo range observation quality

A pseudo-code tracking and pseudo-range observation technology, applied in the field of satellite navigation or integrated navigation, can solve the problems of limited effect of data processing methods, unhelpful quality of pseudo-range observation, and inability to play a role, achieving simple and convenient implementation and practical solutions. Effects of inconvenient application, significant market value

Active Publication Date: 2022-02-08
WUHAN UNIV
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Problems solved by technology

However, in the environment of weak signal, multipath, and severe interference, the quality of most pseudoranges deteriorates seriously, and the effect of data processing methods is limited, and it is not helpful to improve the quality of pseudorange observations, and cannot be used in the ambiguity fixation of precise positioning. effect

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  • Elastic enhanced GNSS pseudo code tracking method for improving pseudo range observation quality
  • Elastic enhanced GNSS pseudo code tracking method for improving pseudo range observation quality
  • Elastic enhanced GNSS pseudo code tracking method for improving pseudo range observation quality

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Embodiment Construction

[0073] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0074] An elastically enhanced GNSS pseudo-code tracking method for improving pseudo-range observation quality is provided in an embodiment. When satellite signals are affected by weakening, interference or multipath, the pseudo-code tracking enhancement information generated by the elastic enhancement module A-DLL is input to GNSS Receiver baseband, auxiliary control pseudo-code NCO, elastically enhance the quality of GNSS pseudo-range observation.

[0075] Firstly, a pseudorange error estimation model is established based on the pseudorange observation equation, and its variation in the urban environment is analyzed; secondly, four enhancement modes are designed according to the types of input information and the differences in auxiliary forms, corresponding to the four models; finally , tested in an urban environment, and ...

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Abstract

The invention provides an elastic enhanced GNSS pseudo code tracking method for improving pseudo range observation quality, and the method comprises the steps of inputting pseudo code tracking enhancement information generated by an elastic enhanced module A-DLL into a GNSS receiver baseband when a satellite signal is affected by weakness, interference or multipath, carrying out the auxiliary control of a pseudo code NCO, elastically enhancing the GNSS pseudo range observation quality, and obtaining high-quality GNSS pseudo range observation information and a continuous and accurate positioning result. The elastic enhanced module A-DLL comprises a satellite information calculation unit, a Doppler prediction model, a pseudo range error estimation model and an elastic enhanced information generation model, and the satellite information calculation unit is used for calculating satellite position, speed, acceleration and satellite correction information; the Doppler prediction model is used for calculating Doppler caused by relative motion of a satellite and a GNSS receiver; the pseudo range error estimation model is used for obtaining a pseudo range error estimation value and assisting pseudo code tracking; the elastic enhanced information generation model is used for supporting four enhancement modes according to input information types and auxiliary form differences.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation or integrated navigation, and relates to an elastic enhanced GNSS pseudo-code tracking scheme for improving the quality of pseudo-range observation. The method of the invention can be used to obtain high-quality GNSS pseudo-range when satellite signals are weak, interfered and multipath Observation information and continuous and precise positioning results. Background technique [0002] Global Navigation Satellite System (GNSS) generally refers to a global satellite system and its augmentation system that can continuously provide users with position, velocity, and time (Position Velocity and Time, PVT) information around the clock. Since its inception, GNSS has fully demonstrated its dominance in the field of navigation and positioning, and revolutionary changes have taken place in many fields of military and civilian use due to the emergence of GNSS. The GNSS receiver obtains the ob...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/30
CPCG01S19/30
Inventor 张提升史金威冯鑫刘山牛小骥
Owner WUHAN UNIV
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