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High Performance Positioning System Based on GNSS Receiver with Multiple Front Ends

a positioning system and receiver technology, applied in satellite radio beaconing, measurement devices, instruments, etc., can solve the problems of non-zero probability of incorrect positioning and imprecise positioning, and achieve the effect of high performan

Active Publication Date: 2020-10-01
TOPCON POSITIONING SYST INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach enhances positioning accuracy and reliability by reducing the probability of incorrect ambiguity resolution, providing fast and correct ambiguity resolution, and improving the robustness of attitude determination results.

Problems solved by technology

This means there is always a non-zero probability of incorrect ambiguity resolution, which could lead to imprecise positioning, or attitude determination results.

Method used

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  • High Performance Positioning System Based on GNSS Receiver with Multiple Front Ends
  • High Performance Positioning System Based on GNSS Receiver with Multiple Front Ends
  • High Performance Positioning System Based on GNSS Receiver with Multiple Front Ends

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Embodiment Construction

[0036]Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

[0037]The equipment that receives signals of global navigation satellite systems (GNSSs) can operate in various operational modes. Different operational modes require equipment of different complexities capable of determining target parameters (such as position, velocity, time and attitude) with different accuracies. The types and quantities of data to be processed also depend on the operational mode. Several operational modes are summarized below.

[0038]FIG. 1A shows a high-level schematic of a global navigation satellite system (GNSS). A constellation of global navigation satellites 102 transmits navigation signals. Shown are six representative navigation satellites, denoted 102A-102F, which transmit navigation signals 103A 103F, respectively. In general, the navigation satellites can belong to more than one global navigati...

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Abstract

A high performance attitude determination system, including a global navigation satellite system (GNSS) receiver, the receiver including a first radio-frequency front-end (RF1) connected to a main antenna; a second radio-frequency front-end (RF2) connected to an auxiliary antenna; and a digital section connected to both RF1 and RF2. The digital section (i) generates a first set of GNSS raw measurements based on signals received from RF1; (ii) generates a second set of GNSS raw measurements based on signals received from RF2; (iii) computes a spatial attitude of a baseline between main and auxiliary antennas, using the first and the second sets of GNSS raw measurements, and based on carrier phase integer ambiguity resolution; (iv) continues updating the spatial attitude using the first and the second sets of GNSS raw measurements without carrier phase integer ambiguity resolution, and using fractional carrier phases. Optionally, RF1 and RF2 use a common clock.

Description

BACKGROUND OF THE INVENTIONField of the Invention[0001]The present invention relates generally to global navigation satellite systems, and more particularly, to a method and apparatus for determining position with high accuracy and reliability.Background of the Related Art[0002]The equipment that receives signals of global navigation satellite systems (GNSSs) can determine target parameters, such as position, velocity, time (PVT), or attitude / orientation (if multiple antennas are used). Examples of currently deployed global navigation satellite systems include Global Positioning System (GPS) of the United States of America and the GLONASS of Russian Federation. Other global navigation satellite systems, such as the European GALILEO and the Chinese Beidou, are under development. In a GNSS, a navigation receiver receives and processes radio signals transmitted by satellites located within a line-of-sight of the receiver. The satellite signals comprise carrier signals modulated by pseu...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01S19/55G01S19/44G01S19/41G01S19/36
CPCG01S19/41G01S19/44G01S19/36G01S19/55
Inventor AVERIN, SERGEY VLADISLAVOVICHVOROBIEV, MIKHAIL YURIEVICHPLENKIN, ANDREY VALERIEVICHMILYUTIN, DANILA SVYATOSLAVOVICH
Owner TOPCON POSITIONING SYST INC