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A Self-Complete Distributed Positioning System Clock Synchronization and Calibration Method and Device

A positioning system and clock synchronization technology, applied in the field of communication, can solve the problems of high cost, low stability and accuracy, and achieve the effect of increasing system cost and improving positioning accuracy

Active Publication Date: 2021-07-27
THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for a positioning system that may reach dozens of remote stations in practice, the use of atomic clocks will result in high costs. Therefore, distributed positioning systems in practical use basically use crystal oscillators with lower stability and accuracy than atomic clocks. clock

Method used

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  • A Self-Complete Distributed Positioning System Clock Synchronization and Calibration Method and Device
  • A Self-Complete Distributed Positioning System Clock Synchronization and Calibration Method and Device
  • A Self-Complete Distributed Positioning System Clock Synchronization and Calibration Method and Device

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Experimental program
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Effect test

Embodiment 1

[0142] In this embodiment, taking the application scenario of clock synchronization and correction of the remote receiving station of the multipoint positioning system for positioning the aircraft on the airport scene and the aircraft in the airspace around the airport as an example, the specific implementation of the timing signal transmission without using the repeater station in the present invention is described. Embodiments will be described in detail. In this embodiment, the distributed positioning system includes a plurality of remote receiving stations distributed in the airport area for aircraft positioning on the scene, and a plurality of remote receiving stations surrounding the airport and having a relatively long distance from the airport for aircraft positioning in the airspace around the airport. stand.

[0143]It is assumed that multiple remote receiving stations distributed in the airport area have a common visible position, and a timing station is set at the ...

Embodiment 2

[0150] In this embodiment, taking the application scenario of clock synchronization and correction of the remote receiving station of the multilateration positioning system for positioning aircraft on the airport scene as an example, the specific implementation of the present invention that needs to use the repeater station for timing signal transmission is described in detail. In this embodiment, the distributed positioning system includes a plurality of remote receiving stations distributed in the airport area for aircraft positioning on the scene, and there is no common visible position for all remote stations, but all remote stations are divided into two After the remote station subsets, each remote station subset has a common visible position. Set up a timing station at the common visible position of a subset of remote stations, the distance between the timing station and the remote stations of the subset is known, and the timing signal is transmitted by radio waves; in an...

Embodiment 3

[0158] The second aspect of the present invention also provides a self-complete distributed positioning system clock synchronization and correction device for implementing the above-mentioned method of the present invention; specifically, as Figure 9-11 , the system of the present invention includes a timing device and a receiving device;

[0159] Wherein said timing device comprises an atomic clock, a clock encoder, a first timing signal encoder, a first modulator and a first transmitter:

[0160] Atomic clock: It is a high-stability, high-accuracy atomic clock source, used to generate high-stability, high-accuracy clock timing signals;

[0161] Clock encoder: It is used to encode the high-stability and high-accuracy clock timing signal generated by the atomic clock in a certain format; the specific encoding format is selected according to the requirements of the actual distributed positioning system.

[0162] The first timing signal encoder: used to encode the timing stati...

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PUM

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Abstract

The invention discloses a self-complete distributed positioning system clock synchronization and correction method, which uses the atomic clock of the time service station to perform time service and synchronization for the crystal oscillator clocks of multiple remote receiving stations in the distributed positioning system, and corrects the accuracy of the crystal oscillator clocks , including the following steps: S1. According to the layout of the remote receiving station of the distributed positioning system and the common visual position of the remote receiving station, the timing station is set; S2. The timing signal is sent periodically through the timing station to directly or indirectly Transmit to the remote receiving station; S3. The remote receiving station receives the timing signal and performs clock synchronization and correction; the method of the present invention is applied to a distributed positioning system for self-complete distributed positioning timing and synchronization, which is beneficial to achieve unnecessary The cost of the system is greatly increased to achieve the purpose of highly accurate and accurate measurement of the arrival time of the target signal by the remote station of the distributed positioning system.

Description

technical field [0001] The invention relates to the field of communication technology, in particular, a self-complete distributed positioning system clock synchronization and correction method and device. Background technique [0002] The distributed positioning system uses remote receiving stations distributed in different locations to receive the signals transmitted by the target, and realizes the positioning of the target by measuring the time when the target signal arrives at each receiving station or the time difference between the stations. [0003] The multipoint positioning system is a typical distributed positioning system. The system uses the time difference positioning system to realize the positioning of the target by measuring the time difference between the arrival of the target signal at each remote station; therefore, the clock synchronization between the remote stations of the distributed positioning system Accuracy, as well as the stability and accuracy of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04R20/04G04F5/14G01S5/00
CPCG01S5/00G04F5/14G04R20/04
Inventor 徐自励华伟
Owner THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA