A Radar Tracking Method for Low-altitude Slow-speed Small Targets Based on Doppler Information

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...

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 points and false tracks, and in the complex strong clutter environment environment, the detection performance will deteriorate sharply, and the algorithm has a large amount of calculation, which is difficult to implement in engineering applications

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