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 long initial period, so as to reduce the generation of false tracks and improve track accuracy. The effect of initial performance

Active Publication Date: 2019-10-01
XIDIAN UNIV
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  • Description
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  • Application Information

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 lo

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  • Track initiation method based on multi-dimensional measurement information
  • Track initiation method based on multi-dimensional measurement information
  • Track initiation method based on multi-dimensional measurement information

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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 scanning 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, acco...

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 track initiation method based on multi-dimensional measurement information. The method comprises the following steps of acquiring measuring point trace set of different scanning periods; establishing a temporary track for the point trace set of the initial scanning periods; in a non-initial scanning period, calculating a Doppler speed by using the Doppler information ofthe point traces; matching the trace point set with a temporary track set by using the Doppler speed information and a logic method; judging whether the temporary track is successfully matched, and ifthe temporary track is successfully matched, updating the temporary track information; and establishing track quality constraint conditions for the temporary tracks meeting the requirement of the number of the point traces by utilizing the amplitude information of the point traces, and performing screening and track initiation. Under the condition of more clutter residues, the track initiation method can realize normal initiation of a target track through two-dimensional constraint of Doppler dimensions and amplitude dimensions, reduces generation of false tracks, and can improve track initiation performance under a complex background compared with the traditional track initiation method.

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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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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