A Track Initiation Method Based on Multi-dimensional Measurement Information

A track initiation and measurement technology, which is applied in the radar field, can solve the problems of track inability to start normally, false track initiation, and poor performance, so as to reduce the generation of false tracks and improve track initiation. performance effect

Active Publication Date: 2021-04-06
XIDIAN UNIV
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AI Technical Summary

Problems solved by technology

The Hough transform method uses the image detection method to start the track, the starting period is long and the amount of calculation is large, and the performance is poor for the target that requires a fast start
The modified Hough transform method adds speed correction to the Hough transform method, and the effect has been improved, but there are still disadvantages of long initial period and large amount of calculation.
These track initiation methods only use information on azimuth, angle, or elevation latitude, but do not use multi-dimensional information such as amplitude and Doppler frequency obtained from radar signal processing. Tracks under complex backgrounds such as targets cannot be started normally, or false track starts may appear

Method used

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  • A Track Initiation Method Based on Multi-dimensional Measurement Information
  • A Track Initiation Method Based on Multi-dimensional Measurement Information
  • A Track Initiation Method Based on Multi-dimensional Measurement Information

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Experimental program
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Effect test

Embodiment 1

[0038] See figure 1 , figure 1 It is a flow chart of a track initiation method based on multidimensional measurement information provided by an embodiment of the present invention. As shown in the figure, the track initiation method based on multidimensional measurement information in this embodiment includes:

[0039] S1: Obtain radar parameters, the radar parameters include radar carrier frequency f 0 and the false alarm probability P of threshold detection fa , to obtain the point trace set reported by the radar signal processing end in each scan cycle i represents the number of scan cycles, the dot trace set Include dot traces within each scan period k represents the number of dots, each of the dots The distance measurement information for each dot track in the scan period Doppler frequency information angle measurement information and amplitude information collection of information;

[0040] S2: Set the first scanning period as the initial period, accordi...

Embodiment 2

[0112] This embodiment provides a simulation experiment about the track initiation method in Embodiment 1. In this embodiment, the number of scans at the start of the track is set to 4, the scan period is 2, the number of targets is 6, and the number of targets is set. The minimum velocity constraint is 40m / s, the maximum velocity constraint is 500m / s, and the target angle constraint is 4°. The initial information of the six targets is shown in Table 1. The parameters of the false target are set as follows. According to the literature, the number of false targets in each scan obeys the Poisson distribution. The radial distance of the false target during each scan obeys the uniform distribution, and the azimuth angle also obeys the uniform distribution. The signal-to-noise ratio is set to 6dB. The amplitude information of false traces obeys Gaussian distribution, and the false alarm rate is set A Gaussian distribution has mean and variance of 0 and 1, respectively.

[0113] ...

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Abstract

The invention relates to a method for starting a track based on multi-dimensional measurement information. Doppler velocity is calculated from the Doppler information of the point traces; Doppler velocity information and the logic method are used to match the point trace set and the temporary track set; it is judged whether the temporary track is matched successfully, and if the matching is successful, the temporary track set is updated. track information; for the temporary track that meets the requirements of the number of point tracks, the track quality constraint condition is established by the amplitude information of the point track, and the screening is carried out to start the track. The track starting method of the present invention can realize the normal starting of the target track and reduce the generation of false tracks through the two-dimensional constraints of the Doppler dimension and the amplitude dimension under the condition of more clutter remaining, which is different from the traditional method. Compared with the track initiation method, the track initiation performance under complex background can be improved.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a track initiation method based on multi-dimensional measurement information. Background technique [0002] Track initiation is a crucial part of radar target tracking, and it is the first step in target tracking. Accurate track initiation can eliminate combined explosions and reduce the burden of calculation. If the track start is not correct, the effect of target tracking will drop sharply, and a good track start is an important basis for tracking. [0003] At present, the commonly used track initiation algorithms mainly include intuitive method, logic method, modified logic method, Hough transform method and modified Hough transform method. The intuitive method utilizes the target speed and position as constraints, which requires less calculation and less certainty. The logic method starts with prediction and correlation gates, and is suitable for situations where ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/415
Inventor 赵永波丁一刘宏伟何学辉水鹏朗
Owner XIDIAN UNIV
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