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Passive multipoint positioning system-based double-threshold association method

A multi-point positioning and double-threshold technology, which is applied in radio wave measurement systems, positioning, and special data processing applications, can solve problems such as wrong target associations, achieve strong adaptability, improve association efficiency, and avoid restarts and terminations.

Inactive Publication Date: 2014-06-18
THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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Problems solved by technology

Because the measured value itself still has isolated "outlier" points caused by external interference or internal system mismatch, sometimes it even causes the occurrence of wrong target association

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  • Passive multipoint positioning system-based double-threshold association method

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, the present invention is described in detail.

[0022] Such as figure 1 As shown, a dual-threshold correlation method based on passive multilaterate positioning system includes the following steps:

[0023] The first step, using the tracking filter 1 and the tracking filter 2 to receive the measured value of the multilateration system at the same time, the initial state is an associated double-threshold structure;

[0024] In the second step, tracking filter 1 and tracking filter 2 respectively calculate the residual error of the measured value;

[0025] The third step, compare the residual error calculated by tracking filter 1 with the preset associated small threshold, and compare the residual calculated by tracking filter 2 with the preset associated large threshold; if the calculated residual of tracking filter 1 If the residual is less than or equal to the associated small threshold, then execute the fourth step; if...

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Abstract

The invention discloses a passive multipoint positioning system-based double-threshold association method. The method comprises the following steps: at an initial state, a double threshold association structure is provided; two tracking filters 1 and 2 respectively calculate residual errors and respectively compare the residual errors with a preset small threshold and a preset big threshold; if the first residual error is smaller than or equal to the small threshold, track association processing is performed by the tracking filter 1, the tracking filter 2 is closed, and an association single-threshold structure is realized; if the first residual error is greater than the small threshold and the second residual error is smaller than or equal to the big threshold, outliers removing processing is performed by the tracking filter 1, track association processing is performed by the tracking filter 2, and the double threshold association structure is maintained; if the two residual errors are both greater than the big threshold, the double threshold association structure is maintained after restarting the two filters. The method has the beneficial effects that reliable association can be performed based on outliers removing; the structure of the tracking filters can be adaptively adjusted to adapt to environmental changes again, and certain robustness and adaptability are achieved.

Description

technical field [0001] The invention relates to the technical field of civil aviation multipoint positioning and monitoring, in particular to a dual-threshold correlation method based on a passive multipoint system. Background technique [0002] The civil aviation multilateration monitoring system belongs to the passive positioning system based on time difference positioning. There are multiple signal receiving stations distributed in different geographical locations in the system. Each receiving station will measure the time (TOA) of the monitoring target response signal arriving at each signal receiving station, and then the central processing subsystem will calculate the time difference (TDOA) of the monitoring target's response signal arriving at each signal receiving station. Finally, the multilaterate positioning system will use the time difference TDOA of more than three signal receiving stations to calculate the precise position of the monitoring target and output t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/06G06F19/00
CPCG01S5/06G01S5/0252G01S5/0294
Inventor 黄荣顺彭卫黄忠涛李恒
Owner THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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