Ground-based high-precision regional positioning navigation system and method

Abstract

The invention relates to the field of satellite navigation and radio positioning, and discloses a ground-based high-precision regional positioning navigation system and a ground-based high-precision regional positioning navigation method. The ground-based high-precision regional positioning navigation system comprises a plurality of distributed navigation base stations, a datum station and a monitoring station, wherein each navigation base station has a navigation signal broadcasting function, is equipped with transmitting and receiving antennas, and adopts a broadband variable-frequency channel design; 2) the navigation base stations and the datum station adopt a bidirectional time synchronization method to achieve time synchronization among the navigation base stations, and the datum station has a GNSS time reference function; the monitoring station has a navigation signal quality monitoring, evaluation and calibration function, and the monitoring station and the datum station can beco-locational. The invention further discloses a high-precision positioning method, which determines initial position coordinates of a receiver based on a single-difference pseudo code phase measurement value, and assists in completion of carrier ambiguity resolution and high-precision positioning. The ground-based high-precision regional positioning navigation system has the advantages of high environment adaptability, high positioning precision, high anti-interference performance, easy deployment, low cost, scalability and GNSS system cooperative work capability.

Description

technical field [0001] The invention relates to the fields of satellite navigation and radio positioning, in particular to a ground-based high-precision area positioning navigation system and method. Background technique [0002] At present, with the maturity of positioning technology, users' demand for real-time and high-precision location services is increasing day by day. Intelligent transportation, environmental monitoring, geographic surveying and mapping, unmanned systems and other fields are inseparable from accurate location services. Global Navigation Satellite System (GNSS) positioning technology has good positioning performance in outdoor open environment, with the help of precise point positioning (Precise Point Positioning, PPP) and real-time dynamic difference (RealTime Kinematic, RTK) Realize centimeter-level or even higher-precision positioning performance. However, in tunnels, underground, mountainous areas, urban canyons, indoors and other environments, sat...

AI Technical Summary

Problems solved by technology

[0004] However, in high-precision positioning applications, due to the lack of simple and effective means of high-precision time synchronization between stations, pseudolite systems usually need to add reference stations so that users can achieve high-precision positioning in a differential manner, but this also increases the construction of pseudolite systems. the complexity

[0005] In addition, the existing ground-based navigation systems usually broadcast navigation signals that are consistent with the signal system of the satellite navigation system or fixed frequency points, which generally have problems such as near-far effect and multi-path, and are susceptible to interference

The above problems affect the application of ground-based navigation systems in increasingly complex electromagnetic environments, especially in high-precision positioning and navigation services

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