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A relative positioning method and system based on 5g TDOA

A kind of relative positioning, 5G technology, applied in positioning, radio wave measurement system, advanced technology and other directions, to achieve the effect of improving user experience, low construction cost, and low solution practicability

Active Publication Date: 2022-05-17
WUHAN UNIV
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  • Application Information

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Problems solved by technology

[0005] In view of the above problems, the present invention proposes a relative positioning technology solution based on 5G TDOA, which can solve the synchronization requirements between base stations of the existing TDOA positioning technology, reduce system construction costs, and realize 5G-oriented low-cost high-precision positioning

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  • A relative positioning method and system based on 5g TDOA
  • A relative positioning method and system based on 5g TDOA
  • A relative positioning method and system based on 5g TDOA

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Embodiment Construction

[0029] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] The embodiment of the present invention provides a relative positioning method based on 5G TDOA. By adding a reference station with known coordinates, the reference station and the user terminal receive the positioning reference signal broadcast by the same 5G base station, and the obtained information such as the TDOA value and the coordinates of the reference station are passed The communication link is transmitted to the user terminal in real time for relative positioning. The user terminal calculates the difference between the TDOA observation data received by itself and the TDOA observation value of the reference station. Based on the principle that different positioning terminals are affected by the same time synchronization error of the base station at the same time, eliminating The time synchronization error bet...

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Abstract

The invention provides a relative positioning method and system based on 5G TDOA. By adding a reference station with known coordinates, the reference station and the user terminal receive the positioning reference signal broadcast by the same 5G base station, and the TDOA observation value obtained by the reference station and the reference station The coordinate information is transmitted to the user terminal in real time through the communication link for relative positioning. The user terminal calculates the difference between the TDOA observation value received by itself and the TDOA observation value of the reference station, and eliminates the time synchronization error between the base stations to form a relative baseline. The known reference station coordinates and the baseline vector correction number obtained from the solution obtain the precise coordinates of the user terminal to realize positioning. The present invention avoids the high time synchronization requirements between base stations in the TDOA-based positioning method, does not need to use atomic clocks or optical fibers to synchronize base stations, and reduces system construction costs. Based on the favorable conditions for large-scale deployment of 5G indoor and outdoor base stations, a lower positioning system Deployment costs achieve integrated communication and positioning coverage.

Description

technical field [0001] The invention belongs to the technical field of wireless positioning, and in particular relates to a 5G communication positioning system and a positioning method and system. Background technique [0002] At present, the positioning method based on the global satellite navigation system has been widely used. However, in the complex urban environment, there are many occlusions, and the satellite positioning signal often cannot meet the positioning requirements, and it is even difficult to receive the satellite signal. For the improvement of positioning accuracy requirements in indoor scenes, the current positioning technologies that mainly focus on indoor positioning, such as Wifi, UWB, and Bluetooth positioning, have defects such as high deployment costs or small coverage. The terminal positioning accuracy of 4G LTE mobile communication system exceeds 100 meters, which is difficult to meet the indoor positioning requirements. IEEE 802.11 established NG...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04W56/00G01S5/10
CPCH04W64/003H04W56/0015G01S5/10Y02D30/70
Inventor 宋伟伟林巍楼益栋郭文飞朱轶群
Owner WUHAN UNIV
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