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Three-frequency wide lane compact combination positioning method for BDS and GPS integration

A wide-lane combination and positioning method technology, applied to satellite radio beacon positioning systems, instruments, measuring devices, etc., can solve the problems of low positioning accuracy and no connection between systems

Active Publication Date: 2019-04-05
SOUTHEAST UNIV
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Problems solved by technology

Multi-GNSS fusion mainly uses two models: one is the loose combination model in which each system selects its own reference satellite, that is, the intra-system difference model, without establishing the connection between the systems, and the positioning accuracy is low in the occlusion environment; the other is Different systems select a compact combination model of common reference satellites, that is, the inter-system difference model

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  • Three-frequency wide lane compact combination positioning method for BDS and GPS integration
  • Three-frequency wide lane compact combination positioning method for BDS and GPS integration
  • Three-frequency wide lane compact combination positioning method for BDS and GPS integration

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[0071] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0072] figure 1 It is a flow chart of the method, and the invention provides a three-band width lane-tight combination positioning method of BDS and GPS fusion, comprising the following steps:

[0073] Step 1, using tri-frequency data to fix the ambiguity of the ultra-wide lane combination (0, -1, 1), thereby assisting the resolution of the ambiguity of the wide lane combination (1, -1, 0);

[0074] Step 2, taking BDS as the benchmark system, constructing the double-difference wide-lane combination model within the BDS system and the double-difference wide-lane combination model between BDS / GPS systems;

[0075] Step 3, re-parameterize the ambiguity of the double-difference wide-lane combination between BDS / GPS systems and perform parameter decorre...

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Abstract

The invention discloses a three-frequency wide lane compact combination positioning method for BDS and GPS integration. The three-frequency wide lane compact combination positioning method for the BDSand GPS integration comprises the steps that firstly, three-frequency data is used for fixing the fuzzy degree of an ultra-wide lane combination (0,-1,1) to assist the solution of the fuzzy degree ofa wide lane combination (1,-1,0); on the basis, a BDS is used as a reference system, the fuzzy degree of the double-difference wide-lane combination between a BDS / GPS inter-system is remodeled and parameter decorrelation is carried out, carrier differential inter-system bias (DISB) based on the wide-lane combination is estimated in real time, when a reference satellite changes, the DISB is converted to realize the continuous estimation of the DISB, and time-varying characteristics of the DISB are statistically analyzed; and based on the characteristics, a BDS and GPS compact positioning modelbased on the wide lane combination is established. According to the results, under the moderate baseline, the fuzzy degree of the ultra-wide lane / wide lane can be fixed quickly and reliably, the positioning accuracy can be obviously improved by using a inter-system compact combination model, and the improvement is more obvious under the shielding environment with few visible satellites.

Description

technical field [0001] The invention relates to the technical field of GNSS (Global Navigation Satellite System) positioning and navigation, in particular to a triple-bandwidth lane-tight combination positioning method of BDS and GPS fusion. Background technique [0002] RTK technology is currently one of the most widely used GNSS precision positioning technologies, and enables users to obtain high-precision positioning results in real time. Fast and reliable fixation of ambiguity is crucial to obtain real-time high-accuracy localization results. At present, in RTK positioning, the basic ambiguity of L1 or L2 is generally solved for positioning solution, but it is affected by factors such as distance between base stations, atmospheric delay error, observation environment, etc., and the success of ambiguity solution in a short time The rate is low, and its initialization time is very long. In the case of poor observation environment, the ambiguity may not be fixed for a long...

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Application Information

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IPC IPC(8): G01S19/46G01S19/44
CPCG01S19/44G01S19/46
Inventor 潘树国闻贺高旺赵庆刘力玮赵越王云凤盛超
Owner SOUTHEAST UNIV
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