Doppler information based method for tracking low-altitude low-speed small target through radar

A Doppler information, small target technology, applied in the direction of reflection/re-radiation of radio waves, use of re-radiation, measurement devices, etc. Detecting performance deterioration and other problems, to achieve the effect of overcoming radar scanning cycle, overcoming false track, and reducing complexity

Active Publication Date: 2015-11-25
XIDIAN UNIV
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AI Technical Summary

Problems solved by technology

Although the TBD algorithm can effectively use various prior information to improve the detection and tracking performance of the radar in the noise or weak clutter environment, but this type of algorithm cannot effectively eliminate false alarm p

Method used

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  • Doppler information based method for tracking low-altitude low-speed small target through radar
  • Doppler information based method for tracking low-altitude low-speed small target through radar
  • Doppler information based method for tracking low-altitude low-speed small target through radar

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Example Embodiment

[0021] Reference figure 1 , The method for tracking low-altitude, slow-speed small targets by radar based on Doppler information of the present invention includes the following specific steps:

[0022] Step 1. The radar continuously performs the i-1th scan and the i-th scan to obtain the target trace set of the i-1th scan respectively And the target trace set of the i-th scan Set the scanning order i of the radar to 2;

[0023] The specific sub-steps of step 1 are:

[0024] 1.1 The radar continuously performs the i-1th scan and the i-th scan, and obtains the target point trace set of the i-1th scan respectively And the target trace set of the i-th scan Among them, the number of target traces in the i-th scan is definition with Respectively represent the target trace set of the i-th scan B The distance unit where the target trace is located, the Doppler channel and the first The azimuth of the target trace,

[0025] 1.2 Calculate the target trace set of the i-th scan B Tar...

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Abstract

The invention discloses a Doppler information based method for tracking a low-altitude low-speed small target through a radar. The method comprises the following steps: 1), respectively carrying out distance clustering on target trace point sets generated when the radar performs scanning of an (i-1)th time and an i-th time, and respectively rejecting cluster false alarm points; 2), according to the target trace point sets with the cluster false alarm points being rejected after the scanning of the (i-1)th time and the i-th time, establishing Q possible tracks; and the radar continuously carrying out scanning of an (i+1)th time and an (i+2)th time, updating each possible track and a target trace point interconnection number, rejecting possible tracks whose target trace point interconnection numbers are smaller than 3, and then rejecting false tracks in the possible tracks so as to obtain D successfully starting target tracks; and 3), the radar carrying out scanning of an (i+r)th time, updating each successfully starting target track and its frame loss number, if the frame loss numbers of the successfully starting target tracks are not greater than 3, adding 1 to inertia frequency r, the radar continuously tracking the successfully starting target tracks, and otherwise, the radar stopping tracking the successfully starting target tracks.

Description

technical field [0001] The invention belongs to the field of radar technology, in particular to a method for tracking low-altitude, slow-speed small targets by radar based on Doppler information, which can be used for detecting and tracking low-altitude, slow-speed small targets. technical background [0002] The detection and tracking of low-altitude and slow-moving small targets is a research hotspot and difficult problem in the field of radar technology. The so-called low-altitude and slow-moving small targets (hereinafter referred to as low-slow and small targets) refer to low-altitude and ultra-low-altitude flying (flying altitude below 1000m), slow flying speed (flying speed less than 200km / h), difficult to be detected by radar (reflection area less than 2m) 2 ) and other small aircraft and airborne objects. The difficulty in detecting low and slow small targets lies in: due to the low flying altitude of low and slow small targets, the clutter echo around them is stro...

Claims

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Application Information

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IPC IPC(8): G01S13/72G01S13/58G01S7/292
CPCG01S7/2927G01S13/588G01S13/723
Inventor 赵永波赵雪玉程增飞刘宏伟何学辉
Owner XIDIAN UNIV
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