A Robust Method for Two-Dimensional Localization of Objects of Unknown Height
A two-dimensional positioning and target technology, applied in the field of electronic information, can solve the problems of decreased positioning accuracy and failure of the positioning system, and achieve the effect of reducing the deterioration of positioning accuracy
Active Publication Date: 2021-11-23
慧众行知科技(北京)有限公司 +1
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[0005] The purpose of the present invention is to solve the problem that the lack of observation stations in the multi-station time difference positioning system leads to the failure of the original positioning system, and the error between the actual height and the assumed height of the target leads to the problem of decreased positioning accuracy. The time difference measurement of less than three observation stations, through the three-dimensional grid search of the target position coordinates and the construction of a third-order tensor, the method of tensor decomposition is used to reduce the dimension, so as to robustly determine the two-dimensional coordinates of the target whose height is unknown
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[0046] The number of observation stations in this example is N=3, and their position coordinates are (300,0,1402), (-300,0,1509), (0,300,1829), the units are meters, and the target position coordinates are (1224.7,866.6,208.3) meters. The real value of the time difference of the target signal arriving at multiple observation stations is [1.4750, 1.2265] T microseconds.
[0047] The specific implementation process of the present invention is as follows:
[0048] Step 1: Initially set the number of observation stations to be N=3, and the observation stations are all at a certain height from the ground, and the position coordinates of the observation stations (α 1 ,β 1 ,γ 1 )=(300,0,1402), (α 2 ,β 2 ,γ 2 )=(-300,0,1509), (α 3 ,β 3 ,γ 3 )=(0,300,1829) (unit: meter) and the time difference measurement t of the target signal arriving at multiple observation stations 21 = 1.4632, t 31 = 1.2166 (unit: microseconds) and other data are written into the host memory;
[0049]...
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The invention belongs to the technical field of electronic information, and in particular relates to a robust method for two-dimensional positioning of a target whose height is unknown. The purpose of the present invention is to solve the problem that the lack of observation stations in the multi-station time difference positioning system leads to the failure of the original positioning system, and the error between the actual height and the assumed height of the target leads to the problem of decreased positioning accuracy. The time difference measurement of less than three observation stations, through the three-dimensional grid search of the target position coordinates and the construction of a third-order tensor, the method of tensor decomposition is used to reduce the dimension, so as to robustly determine the two-dimensional coordinates of the target whose height is unknown .
Description
technical field [0001] The invention belongs to the technical field of electronic information, and in particular relates to a robust method for two-dimensional positioning of targets with unknown heights by using time difference measurement of multiple observation stations. Background technique [0002] The time difference positioning technology uses the time difference between the arrival of the target signal at multiple observation stations to realize the positioning of the target. In the two-dimensional plane, the time difference between two observation stations can determine a set of hyperbolas, so at least three observation stations are required to perform two-dimensional positioning on the target on the two-dimensional plane; The time difference between them can determine a set of hyperboloids, so at least four observation stations are needed to perform three-dimensional positioning of the target in three-dimensional space. In the actual time difference positioning sc...
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IPC IPC(8): G06F17/16
CPCG01S5/06G01S5/12G01S5/16G01S5/22G01S5/28
Inventor 王争儿万群李逸君何飞宏刘翼鹏赵红鹏
Owner 慧众行知科技(北京)有限公司