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Method of improving multipoint time-difference positioning accuracy

A time-difference positioning and precision technology, applied in the field of high-precision positioning realization, can solve problems such as positioning accuracy errors, and achieve the effect of strong adaptability, convenient and fast deployment, and convenient and fast deployment

Active Publication Date: 2013-04-24
BEIJING RES INST OF TELEMETRY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the hyperbolic cross positioning algorithm, intuitively, since the hyperbola tends to asymptote at the far end, a very small error in the time difference of arrival will cause a huge error in the positioning accuracy of the far end

Method used

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  • Method of improving multipoint time-difference positioning accuracy
  • Method of improving multipoint time-difference positioning accuracy
  • Method of improving multipoint time-difference positioning accuracy

Examples

Experimental program
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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, the present invention is described in detail, as figure 1 As shown, the details are as follows:

[0022] 1. If figure 2 Deployment system equipment shown (taking ground deployment as an example). Deploy the three receiving auxiliary stations L120, R130, and H140 around the central receiving station C110 in a certain way (star, T, etc.), and deploy the central station on the radar (or interrogator) Around 100, the baseline length 210 is controlled within several kilometers. Select the connection mode between sites according to the actual situation, such as optical fiber or wireless. The above-mentioned receiving stations (central receiving station and receiving auxiliary station) can not only use the radiation signal of the target but also use its reflected signal to locate the target; each receiving station adopts a short baseline (the length of the baseline is within a few kilometers, and the typical value is 0.1km~ ...

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Abstract

The invention discloses a method of improving multipoint time-difference positioning accuracy. Equipment applying the method comprises a center receiving station, at least three auxiliary receiving stations, a radar or an interrogator. The radar or the interrogator can emit electromagnetic waves and objects can reflect the electromagnetic waves or emit response electromagnetic waves after the electromagnetic waves emitted by the radar or the interrogator irradiate on the objects. Each receiving station can not only receive object echoes but also can receive synchronous signals emitted by the radar or the interrogator. Then echoes can be pretreated and pretreated data can be transmitted to the center receiving station. The center receiving station can measure delay time between the arrival time of the echoes and the synchronous signals of the radar or the interrogator. Object positions can be confirmed through cross bearing algorithm of an oval and a hyperbola. A positioning algorithm of the method of improving the multipoint time-difference positioning accuracy can improve the object positioning accuracy by more than one order of magnitude when arrival time-difference measuring accuracy is the same to a station deploying mode.

Description

technical field [0001] The invention relates to the field of multi-point correlation positioning and multi-point passive positioning, especially provides a feasible, real-time and high-precision positioning realization method in the aspect of networking application of multi-point passive positioning system and radar system. Background technique [0002] In multi-point correlation positioning and multi-point passive positioning, the hyperbolic intersection positioning algorithm is usually used to locate the target. The basic principle of hyperbolic cross positioning is: the time difference between the emitted or reflected electromagnetic waves of the target reaching each receiving station through different paths is not zero, according to the distance difference between any point on the hyperbola (surface) and the two focal points is a constant, So as long as the time difference between the arrival of the same electromagnetic wave at each receiving station is measured, a set o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/12G01S5/16
Inventor 刘平原汪玥姜盛峰肖军鹏
Owner BEIJING RES INST OF TELEMETRY
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