Moving target track tracking method based on track correlation

A moving target and track tracking technology, which is applied in the field of track tracking of moving targets based on track correlation, can solve the problems of sudden change in track height, disordered target track, discontinuous target track tracking, etc., and achieves good results. The effect of target tracking, solving the sudden change of track, and improving the detection accuracy

Active Publication Date: 2020-01-10
XIDIAN UNIV
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AI Technical Summary

Problems solved by technology

[0005] However, the existing algorithms in track tracking do not solve the problem of sudden changes in track height due to false alarms in the detection results, resulting in discontinuous tracking of target tracks, disordered target tracks, etc.

Method used

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  • Moving target track tracking method based on track correlation
  • Moving target track tracking method based on track correlation
  • Moving target track tracking method based on track correlation

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Experimental program
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Embodiment Construction

[0033] The embodiments and effects of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] refer to figure 1 , a kind of moving target track tracking method based on track correlation of the present invention, comprises the following steps:

[0035] Step 1. The radar acquires the echo data of the moving target, and performs pulse compression on the echo data to obtain the pulse compressed echo signal and the distance information of the moving target;

[0036] Specifically follow the steps below:

[0037] (1.1) The FMCW radar transmits the signal, and records the echo of the target; suppose, then the radar’s transmitted signal is:

[0038]

[0039] Among them, j is the imaginary unit, f c is the starting frequency of the radar, γ is the frequency modulation slope, t is the slow time, is the fast time, that is, the time within a transmit waveform; the bandwidth of the transmit signal B=γ*T r ,T r is the...

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Abstract

The invention discloses a moving target track tracking method based on track correlation. The pulse compression is performed on an obtained FMCW radar intermediate frequency echo signal to obtain thedistance information of a target; and then the signal-to-noise ratio is judged to obtain a long-distance low signal-to-noise ratio signal and a close-distance high signal-to-noise ratio signal; CFAR detection and linear difference is performed on the high signal-to-noise ratio signal, and multi-frame accumulation is performed on the high signal-to-noise ratio signal; and finally, a track correlation processing method is used for target correlation, and sudden changes in altitude are removed to obtain a continuous moving target track. The track tracking method greatly improves the detection accuracy, the altitude value of the target can be calculated in real time, and the moving track of the target is marked; and meanwhile, the problems of discontinuous tracking of the target track and disorder of the target track are solved.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, in particular to a track tracking method for a moving target based on track correlation. Background technique [0002] Since the radar is not blocked by fog, cloud and rain, it can detect the target all day and night. As an important sensor, radar is very sensitive to the detection of target speed and distance, so it is an ideal sensor for observing the distance of moving targets. The frequency modulated continuous wave (Frequency Modulated Continuous Wave, FMCW) radar has been widely used in the field of radar altimetry because of its excellent performance and low cost. [0003] In recent years, in modern warfare, due to the development of various anti-radiation and stealth technologies and the application of related equipment, the measurement of the altitude of aircraft and missiles is particularly important. The measurement of the altitude of these targets is very important fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/66G01S13/72G01S13/58G01S7/41
CPCG01S13/66G01S13/726G01S13/583G01S7/418Y02A90/10
Inventor 王虹现王开放孙希平张磊
Owner XIDIAN UNIV
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