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Passive positioning system selection method based on BDS satellite

A passive positioning and system technology, applied in instruments, complex mathematical operations, design optimization/simulation, etc., can solve problems such as high positioning accuracy, inability to guarantee, and inability to locate

Pending Publication Date: 2021-11-12
36TH RES INST OF CETC +1
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AI Technical Summary

Problems solved by technology

In the same detection area, only one positioning method is used for different situations, which cannot guarantee high positioning accuracy
The multi-transmission and multi-reception positioning method has a better positioning effect, and the information parameters of the required target are relatively small, but it requires three BDS satellites as opportunistic radiation sources at the same time, while the single-transmission and single-reception positioning method only requires a single BDS satellite as an opportunity radiation source The positioning can be realized by the source, but there is a positioning blind area. When passing through the point where the receiving station is located, a straight line with a slope of ±1 and its surrounding range, the positioning accuracy of the target is extremely poor, and it is even impossible to locate the target.

Method used

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  • Passive positioning system selection method based on BDS satellite
  • Passive positioning system selection method based on BDS satellite
  • Passive positioning system selection method based on BDS satellite

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Embodiment

[0028] In this embodiment, the scenario is that there are multiple receivers to locate the target based on the radiation of multiple BDS satellites reflected by the target (x, y, z). The basic method and principle of positioning are as follows figure 1 shown. In the figure, Indicates the distance from the target to the BDS satellite m; Indicates the distance from the target to the receiving station n; R m,n Indicates the distance from BDS satellite m to receiving station n, m=1, 2, 3; n=1, 2, 3 in the figure.

[0029] The above problem can be described as a mathematical model with constraints, the variables are target position X(x,y,z), BDS satellite coordinates and receiver coordinates m=1,...,M; n=1,...,N, where M is the number of satellites and N is the number of receivers. Detection area Ω 0 : -50km<x<50km, -50km<y<50km, z=10km; divide the x-axis of the detection area into P parts at equal intervals, and divide the y-axis into Q parts at equal intervals, and PQ p...

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Abstract

The invention discloses a passive positioning system selection method based on a BDS, and the method comprises the steps of building a constraint optimization model with the optimal GDOP of a receiver near region as a cost function, calculating the cost function values of different positioning systems, carrying out the processing, carrying out the comparison, and selecting a corresponding optimal positioning system under different numbers of satellites; and parameters required by positioning being obtained in real time, so that the passive positioning system can be dynamically selected. By comparing the GDOP mean values of different positioning systems, the optimal positioning mode can be independently selected according to the strength of satellite signals.

Description

technical field [0001] The invention relates to a BDS-based passive positioning system selection method, especially in the scene of observing a target when the number of satellites changes dynamically, and determines the corresponding optimal system according to different satellite numbers to locate the target. Background technique [0002] Based on BDS passive positioning means that the receiver itself does not actively emit electromagnetic waves, but uses the electromagnetic waves emitted by target scattering satellites to achieve target positioning. By using information such as Doppler frequency shift, time difference and angle of arrival of multi-station receiving signals, from which The parameters that can be used for positioning are extracted to realize the estimation of the target position information. [0003] The passive positioning method has multiple transmission and multiple reception types (T n -R n ), multi-send single-receipt type (T n -R), single send mult...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F17/16G06F119/02
CPCG06F30/20G06F17/16G06F2119/02
Inventor 朱辉杰王李军宋朱刚肖泽龙胡泰洋邵晓浪张晋宇
Owner 36TH RES INST OF CETC
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