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Aircraft time difference positioning method and system based on gnss precise time synchronization

A precision time and time difference positioning technology, applied in satellite radio beacon positioning system, time division multiplexing system, service based on location information, etc., can solve problems such as poor time synchronization effect and reduced aircraft positioning accuracy

Active Publication Date: 2021-01-05
BEIHANG UNIV +2
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  • Abstract
  • Description
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Problems solved by technology

However, in the existing time difference positioning methods, no effective solution has been provided for the time synchronization of the receiving base stations, resulting in poor time synchronization between base stations and reducing the positioning accuracy of the aircraft

Method used

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  • Aircraft time difference positioning method and system based on gnss precise time synchronization
  • Aircraft time difference positioning method and system based on gnss precise time synchronization
  • Aircraft time difference positioning method and system based on gnss precise time synchronization

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Embodiment Construction

[0058] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0059] figure 1 The schematic flow diagram of the aircraft time difference positioning method based on GNSS precise time synchronization provided by the embodiment of the present invention, such as figure 1 As shown, the embodiment of the present invention provides an aircraft time difference positioning method based on GNSS precise time synchron...

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Abstract

The embodiment of the invention provides an aircraft time difference positioning method and system based on GNSS precise time synchronization, and the method comprises the steps: carrying out time synchronization of a plurality of base stations based on GNSS precise time, so as to enable the time of the base stations to be precisely synchronized; according to the time in a GNSS receiver in each base station after time precision synchronization, obtaining a time difference observation value of a target aircraft signal source corresponding to each base station, the time difference observation value being a time difference when the same frame of radio signal sent by the target aircraft signal source reaches each base station; and acquiring coordinates of the signal source of the target aircraft according to the time difference observation value and known coordinates of the base stations so as to position the target aircraft. The embodiment of the invention improves the positioning precision of the aircraft.

Description

technical field [0001] The invention relates to the technical field of radio measurement and positioning, in particular to an aircraft time difference positioning method and system based on GNSS precise time synchronization. Background technique [0002] The Time Difference of Arrival (TDOA) positioning technology plays a very important role in the field of radio monitoring and aviation, and has the characteristics of high precision, wide coverage and passive. [0003] The existing time difference positioning method based on TDOA calculates the position coordinates of the signal source according to the time difference of the radio signal sent from the signal source arriving at the base station (more than 4 places), and then according to the position information of the base station, and the positioning accuracy is mainly determined by the time synchronization accuracy It is determined by the measurement accuracy of the time difference between radio signals arriving at differe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/06H04W4/02H04W4/44H04W56/00H04W64/00H04J3/06G01S19/25
CPCG01S5/06G01S19/256H04W4/02
Inventor 吕金虎张明朱国梁刘克新谷海波陈波波
Owner BEIHANG UNIV
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