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Multi-target tracking method after through-wall radar imaging

A multi-target tracking and wall-penetrating radar technology, applied in the field of multi-target detection and tracking, can solve the problems of no tracking, not suitable for practical application, and high computational complexity of imaging algorithms, and achieve good real-time performance, high target tracking accuracy, and tracking accuracy high effect

Inactive Publication Date: 2015-09-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

The idea of ​​tracking after imaging is used in the document "A new measurement method for through-the-wall detection and tracking of moving targets.Measurement, vol.46, pp.1834-1848, 2013." However, the computational complexity of the imaging algorithm is relatively high. High, the tracking algorithm is relatively simple, not suitable for practical application
Judging from the published literature, there is no fast and real-time method for tracking multiple high-mobility targets behind the wall after imaging

Method used

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  • Multi-target tracking method after through-wall radar imaging
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  • Multi-target tracking method after through-wall radar imaging

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Embodiment Construction

[0026] The process is like figure 1 Shown:

[0027] Step 1: Antenna setup steps

[0028] Through-wall radar uses a multi-transmit and multi-receive MIMO antenna array set on the same horizontal line to detect moving targets behind a wall. In actual operation, the number of antennas can be flexibly set in consideration of accuracy and cost.

[0029] Step 2: Quick imaging step

[0030] According to the wall thickness d and the dielectric constant ε of the detection scene and the cable length, the experience value of antenna focus delay compensation τ′ when the m-th transmitting antenna transmits signals and the n-th receiving antenna receives signals is obtained mn , M=1,2,...,M T , N=1,2,...,N R , And M T And N R Respectively is the number of receiving and transmitting antennas, then the echo signal Y transmitted by the mth transmitting antenna received by the nth receiving antenna mn (t) is:

[0031] Y mn ( t ) = s t ( t - τ mn , x p , ...

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Abstract

The present invention provides a multi-target tracking method after through-wall radar imaging, the rapid imaging can be achieved in a certain error, and a high quality imaging result can be obtained. According to the target targeting algorithm based on two-dimensional low-pass filtering and image etching, measurement position information and amplitude information can be effectively extracted, and finally a nearest area data association algorithm is used to carry out target tracking. At the same time, according to an interacting multiple model tracking algorithm, the high mobility of the target is fully considered, and the target tracking accuracy is high.

Description

Technical field [0001] The invention relates to a through-wall radar technology, in particular to a multi-target detection and tracking technology of the through-wall radar. Background technique [0002] Penetrating radar is a special equipment that uses electromagnetic waves of a specific frequency band to penetrate buildings, and receives scattered echo data from humans and other targets behind the building to achieve imaging detection and tracking of hidden targets. In recent years, it has been used in military operations such as anti-terrorism, street fighting, and disaster relief. And civilian applications have been more and more widely used. Since the building wall will change the propagation path and speed of the electromagnetic wave emitted by the radar, the echo delay error caused by it will cause the target image to defocus, position shift and multipath phantom after imaging. The above-mentioned target image will further affect target extraction and target data associa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/66G01S13/88
CPCG01S13/66G01S13/888
Inventor 崔国龙刘健强邹志剑郭世盛张鹏杨晓波孔令讲易伟杨建宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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