Judgment method of target moving-stationary state based on passive multilateration technology
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A multi-point positioning and static state technology, applied in the field of target monitoring, can solve problems such as irregular time intervals
Active Publication Date: 2016-08-03
THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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Problems solved by technology
[0005] 1. The time interval between continuous measurement values before and after the same target is irregular, ranging from microseconds to tens of seconds;
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Embodiment 1
[0052] Such as figure 1 Shown, a kind of target motion-static state judging method based on passive multilateration technology is characterized in that comprising the following steps:
[0053] The first step is to obtain the measurement values of N targets from the airport scene monitoring multilateration system as a window processing sample: {x 1 ,y 1},{x 2 ,y 2},...{x N ,y N}, respectively calculate the geometric precision factor matrix of these N measured values, namely in E(x i the y i ), E(x i the y i ), represents the mathematical expectation;
[0054] The second step is to subtract the remaining N-1 measured values from the Nth measured value to obtain Δx Ni =x N -x i , i=1~N-1, Δy Ni =y N -y i ,i=1~N-1;
[0055] The third step, build The correlation matrix of
[0056] Q x x = E { Δ x Δ ...
Embodiment 2
[0067] Such as figure 2 Shown, a kind of target motion-static state judging method based on passive multilateration technology is characterized in that comprising the following steps:
[0068] The first step is to obtain the measurement value x from the airport surface monitoring multilateration system k 、y k ;
[0069] The second step is to calculate the geometric precision factor matrix, namely in E(x k the y k ), represents the mathematical expectation;
[0070] The third step, calculation If the target is at rest, then ξ k subject to χ with 2 degrees of freedom 2 distribution; if the target is in motion, that is, Δx k or Δy k is no longer a zero-mean Gaussian random variable, ξ k will be significantly larger;
[0071] The fourth step is to set the significance level α, then the threshold M of a single measured value can be determined, and then use ξ k Make the following judgments: a. When ξ k > M, the target is judged as moving; b, when ξ k ≤M, it is ...
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Abstract
The invention discloses a target motion and rest state judging method based on the passive multi-point positioning technology. The method can perform judgment through a signal measured value or multiple measured values. The judgment step with the signal measured value comprises computing the geometric accuracy factor matrix of the single measured value and utilizing the geometric accuracy factor matrix to normalize the measured value to obtain a judgment statistic. The judgment step with the multiple measured values comprises subtracting the N-1th measured value from the Nth measured value, composing a column vector according to x-axis data and y-axis data, structuring an associated matrix of the vector by combining with the geometric accuracy factor matrix computed from the measured values to normalize the column vector and further to structure a judgment statistic, and performing judgment according to a threshold value. The target motion and rest state judging method based on the passive multi-point positioning technology is based on statistical hypothesis testing and combined with an airport surface monitoring multi-point location system, thereby being high in system flexibility and robustness, small in calculating amount, good in detecting performance and capable of performing judgment flexibly through the single measured value and the multiple measured values.
Description
technical field [0001] The invention relates to the technical field of target monitoring in the field of civil aviation, in particular to a method for judging target motion-stationary state based on passive multipoint positioning technology. Background technique [0002] The surveillance of airport surface targets is a hot issue in the field of civil aviation. The traditional surface surveillance system is the primary surface surveillance radar. This kind of equipment has some disadvantages, such as low accuracy of surface surveillance, the surveillance range is greatly affected by the airport environment, and it is easily affected by weather such as rain and snow. [0003] The multipoint positioning system for airport surface surveillance is a passive positioning system based on time difference positioning. Its principle is to first obtain the time difference of arrival (TDOA) of the targets received by the receiving stations at different locations, and then calculate the t...
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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/00G01S5/06G01S5/18G01S5/22
CPCG01S5/00G01S5/06G01S5/18G01S5/22
Inventor 黄荣顺彭卫王伟蒋凯
Owner THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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