Track generation method and device for distributed positioning system

A positioning system and distributed technology, applied in positioning, measuring devices, radio wave measuring systems, etc., can solve the problems of non-constant target positioning error, failure to improve the overall positioning accuracy of the target, and achieve the effect of improving positioning accuracy

Active Publication Date: 2020-08-07
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

Since GDOP causes the target positioning error of the distributed positioning system to be non-constant, the use of fixed measurement error parameters to filter the target "dot trace" cannot achieve the purpose of improving the overall positioning accuracy of the target, and the target must be located according to the specific position of the target. The error can be estimated more accurately, and the filtering parameters can be changed to achieve the goal of improving the overall positioning accuracy of the target.

Method used

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  • Track generation method and device for distributed positioning system
  • Track generation method and device for distributed positioning system
  • Track generation method and device for distributed positioning system

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as image 3 As shown, a track generation method of a distributed positioning system of the present invention includes:

[0035] S1: Obtain the time difference between the arrival of the target signal at each remote receiving station at time k, and determine the estimated position of the target according to the positioning equation, specifically including:

[0036] First, the time it takes for the signal of interest to reach each remote receiving station is measured. Let the target position at time k be Z k , there are N remote receiving stations with known positions, and the position of the i-th remote receiving station is R i , the measured target signal arrival time at the i-th remote receiving station is TOA i ;

[0037] Secondly, calculate the time difference TDOA between the arrival of the target signal at the i-th and i+1 (i=1, 2, ..., N-1) remote receiving stations i，i+1 ,

[0038] TDOA i，i+1 =TOA i -TOA i+1

[0039] According to the positioning eq...

specific example

[0106] The specific example of the present invention according to above-mentioned track generating method is as follows:

[0107] The specific process of locating airspace targets around the airport is as follows: Figure 4 shown, including:

[0108] The five remote receiving stations of the distributed positioning system receive the signals transmitted by the target, measure the arrival time of the signals at the five receiving stations, and send the measured signal arrival time data to the central processing station of the distributed positioning system.

[0109] The central processing station of the distributed positioning system calculates 4 time differences in total when the target signal arrives at the 5 remote receiving stations, 1 and 2, 2 and 3, 3 and 4, and 4 and 5, respectively. .

[0110] According to the time difference of the calculated signal arriving at the five remote receiving stations and the position coordinates of the five remote receiving stations, the ...

Embodiment 2

[0132] Considering that the aircraft is located in different areas, the trajectory generation process is different, so before the step of determining the estimated position of the target aircraft according to the time difference between the arrival of the target aircraft signal at each remote receiving station, it includes: according to the specific time of receiving the target aircraft signal A remote receiving station determines whether the target aircraft is located in an air zone or a ground zone. Specifically, the central processing station of the distributed positioning system judges the area where the target is located according to the specific receiving station that receives the target signal. Since there is a certain distance from the airport, the multiple remote receiving stations used to locate aircraft in the airspace around the airport cannot receive the positioning signals emitted by the aircraft on the airport scene. Therefore, if multiple remote receiving statio...

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Abstract

The invention provides a track generation method and device for a distributed positioning system. The method comprises the steps of: obtaining the time difference between the arrival of a target signal at the far-end receiving stations of the distributed positioning system at a moment k, and determining a target estimation position according to a positioning equation; determining the position measurement error covariance matrix of a target according to the target estimation position and the positions of the far-end receiving stations; according to the position measurement error covariance matrix of the target, establishing a Kalman filtering equation to filter the target estimation position to obtain a corresponding target correction position; repeatedly calculating the estimation positionof the target, the position measurement error covariance matrix of the target and the target correction position at the moment k+1, namely when k is equal to the sum of k+1; and the track of the target is determined according to the target correction positions at multiple moments. According to the method, the target positioning error of the distributed positioning system is estimated more comprehensively and accurately, particularly, the influence of GDOP on target positioning accuracy is considered; a more accurate track is generated according to more accurate error parameter estimation; andthe overall positioning accuracy of the distributed positioning system for a target aircraft is improved.

Description

technical field [0001] The invention relates to the field of data processing of a distributed positioning system, in particular to a method and device for generating a track of a distributed positioning system. 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 remote receiving station or the time difference between stations. The multilaterate positioning system is a typical distributed positioning system. The multipoint positioning system uses the time difference positioning system to locate the target by measuring the time difference between the arrival of the target signal at each remote receiving station. It is widely used in the field of civil aviation to realize the positioning and monitoring of aircraft and airport vehicles. [0003] Bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/06G01S5/02
CPCG01S5/06G01S5/0294G01S5/021
Inventor 徐自励华伟
Owner THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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