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Time difference positioning method and device for multiple measuring stations

A time difference positioning and measuring station technology, which is applied in the direction of measuring devices, positioning, radio wave measuring systems, etc., can solve the problems of the influence of the accuracy of the target solution and the influence of the positioning accuracy of the master station, etc., so as to improve the accuracy, avoid waste, The effect of improving positioning accuracy

Active Publication Date: 2021-12-14
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, using the same time difference measurement value information and selecting different main measuring stations, the errors of the positioning results obtained are different, which has a great impact on the accuracy of the target solution
At present, most methods do not consider the influence of master station selection on positioning accuracy.

Method used

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  • Time difference positioning method and device for multiple measuring stations
  • Time difference positioning method and device for multiple measuring stations
  • Time difference positioning method and device for multiple measuring stations

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Assuming that there are N measuring stations for time difference positioning, there are N(N-1) / 2 time difference values ​​between any two measuring stations. Select the main measuring station. At this time, there are N-1 time difference measurements between other auxiliary stations and the main station. In theory, if there is no measurement error, the N-1 time difference can be used to deduce the time difference between other measuring stations. difference. This is not the case in the presence of measurement errors. In order to make full use of the N(N-1) / 2 time difference information, instead of simply specifying a master station, only N-1 time difference measurements between the master station and other auxiliary stations are used, and the projection matrix is ​​used here for processing. The projection matrix is:

[0027]

[0028] in, 1 (N-1)×1 Represents an N-1 row and column vector whose elements are all 1, I (N-1)×(N-1) Represents the N-1 dimensional ident...

Embodiment 2

[0040] This embodiment provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the time difference positioning method for multiple measurement stations as described in Embodiment 1 are implemented. The specific steps performed can be Referring to Embodiment 1, details will not be repeated here.

Embodiment 3

[0042] This embodiment provides a time difference positioning device for multiple measurement stations, including a processor of a terminal device and a computer-readable storage medium, the processor is used to implement instructions; the computer-readable storage medium is used to store multiple instructions, and the instructions are suitable for Since the processor loads and executes the steps of the multi-measurement station time difference positioning method described in Embodiment 1, the specific method steps executed can refer to Embodiment 1, and will not be repeated here.

[0043] In summary, the present invention makes full use of the existing time difference measurement value information, utilizes the time difference measurement values ​​between all pairs of measuring stations, avoids the waste of information, improves the accuracy of position calculation, and uses the projection matrix to calculate the time difference Information fusion is carried out on the measure...

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Abstract

The invention discloses a time difference positioning method and device of multiple measuring stations. The method includes: acquiring N(N‑1) / 2 time difference measurement values ​​by using a time delay estimation method; using a projection matrix P to calculate the time difference measurement value T old Perform projection processing to obtain the projected time difference measurement value T new ; Then select the mth measurement station as the master station, and other measurement stations as auxiliary stations, from T new Select N-1 corresponding time difference measurement values ​​between the auxiliary station and the main station, and use the time difference measurement values ​​obtained in the previous step to calculate the coordinate position of the radiation source; then designate N measurement stations as the main station respectively, and get different GDOP contour distribution map in the case of the master station; compare the GDOP values ​​of the calculated coordinate position in the N contour distribution maps to determine whether the coordinate position is the final solution result. The present invention utilizes all time difference measurement value information, avoids the waste of time difference measurement value, takes into account the influence of the selection of the main station on the target, and improves the positioning accuracy.

Description

technical field [0001] The invention belongs to the technical field of time difference positioning, in particular to a method and device for time difference positioning of multiple measuring stations. Background technique [0002] Time-of-flight positioning technology has low requirements on antennas and good concealment. It is an effective passive positioning technology and has been widely researched and applied in the field of spectrum monitoring. Time-of-flight positioning technology generally requires at least three measuring stations to perform effective two-dimensional positioning on the ground. In order to effectively locate the ground target, multiple measuring stations (more than 3) are generally used for layout, and multiple sets of time difference values ​​are obtained, and then the positioning solution is performed. [0003] Traditional solution methods include least squares method, Chan method, Taylor method, CTLS method, etc. In the process of solving, it is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/06
CPCG01S5/06
Inventor 胡正郭利强刘军杨青李树芳张波卜晓楠
Owner CHINA ELECTRONIS TECH INSTR CO LTD