False track elimination method based on distance differential

A false track and track technology, applied in the direction of reflection/re-radiation of radio waves, use of re-radiation, measurement devices, etc., can solve the problems of high false alarm rate, reduced false alarm probability, and high false alarm probability of track. , to avoid the existence of ambiguity, reduce the probability of false alarm, and avoid the failure of track tracking

Pending Publication Date: 2020-10-09
安徽瞭望科技有限公司
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Problems solved by technology

[0006] In view of the problems in the above-mentioned technical background, the purpose of the present invention is to provide a method for eliminating false tracks to solve the problems of high false alarm probability and high false alarm rate of tracks in complex environments. This method is based on the original classical process

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  • False track elimination method based on distance differential
  • False track elimination method based on distance differential
  • False track elimination method based on distance differential

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[0044] The detailed description will be given below with reference to specific embodiments of the present invention. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0045] A method for removing false tracks based on distance differentiation, which specifically includes the following steps:

[0046] 1) Estimated track location at arrival time:

[0047] According to the last time track filter value (position filter, speed filter and filter update time) and the associated point track, the track is predicted to the corresponding time of the associated point track:

[0048]

[0049] Among them, Δt is the time difference between the arrival time of the point track and the time of the last track filtering;

[0050] [x p y p z p ] T Is the predicted value of the track;

[0051] [x s y s z s ] T Is the track filter value;

[0052] [x v y v z v ] T Is the tra...

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Abstract

The invention discloses a false track elimination method based on distance differential. The problems of high false alarm probability and high false alarm law of a flight path in a complex environmentare solved. According to the method, track distance differential Doppler speed and trace point Doppler speed consistency statistical discrimination processing are added on the basis of an original classical processing algorithm, so that the false alarm probability is greatly reduced, and effective tracking of a real target is ensured. Compared with the prior art, the method has the advantages that a statistical method instead of real-time judgment is adopted, so that the problem of track tracking failure caused by occasional one-time Doppler velocity jump is avoided; according to the method,the channel number difference between a track Doppler filter and a plot Doppler filter is calculated, so that the track Doppler speed and the plot Doppler speed are prevented from being fuzzy, and therelated correctness is improved; compared with a traditional processing method, the method has the advantages that the false alarm probability of the flight path can be greatly reduced, the number offalse flight paths can be reduced by one order of magnitude through testing, and the effect is obvious.

Description

technical field [0001] The invention relates to the technical field of radar information processing, in particular to a method for eliminating false tracks based on distance differentiation. Background technique [0002] For general traditional radars, the distance, azimuth, pitch (or height) information of the echo is usually used to track the target in the process of track processing. False tracks, and it is very easy to cause track association errors, resulting in track tracking and other problems. [0003] However, the traditional point-track filtering technology is difficult to realize the refined processing of the track target point-track in the complex and changeable space environment. [0004] Some scholars have proposed a fine-grained spot-track processing method for air traffic control radar. For example, "Radar Science and Technology" recently published an article entitled "Design and Implementation of Air Traffic Control Primary Radar Refined Spot-Trace Processi...

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Application Information

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IPC IPC(8): G01S13/58G01S7/41
CPCG01S13/58G01S7/415
Inventor 刘联节
Owner 安徽瞭望科技有限公司
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