A Hidden Target Location Method for Single Building Corner

A technology of concealed target and positioning method, which is applied in the field of radar target positioning using ultra-wideband multipath, can solve problems such as unable to hide target positioning, and achieves the effects of small calculation amount, high target positioning accuracy, and simple implementation process.

Active Publication Date: 2022-05-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] In order to solve the problem that the hidden target behind the corner of a single building cannot be located in the existing multi-path detection, the present invention proposes a hidden target positioning method suitable for the corner of a single building, which can accurately obtain the position information of the hidden target behind the corner, and the calculation is simple , and high practicality

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  • A Hidden Target Location Method for Single Building Corner
  • A Hidden Target Location Method for Single Building Corner
  • A Hidden Target Location Method for Single Building Corner

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Experimental program
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specific Embodiment approach

[0048] Step 1: Setting the environmental parameters of multi-path detection at the corner of a single building;

[0049] For the actual measurement experiment, the scene graph is as follows figure 2 As shown in the figure, three different viewing angles of the detection environment are given in the figure. The experiment takes the corner O as the coordinate origin, then (x O ,y O )=(0m,0m), the radar system is a single-transmission and single-reception ultra-wideband radar, the transmission signal is a step-frequency continuous wave, and the signal bandwidth B=600MHz, where the distance between the radar transceiver antennas is 0.075m, and the center coordinates of the transceiver antennas are (x R ,y R )=(0.45m,-0.35m), the height of the antenna from the ground is 1.2m. The center of the radar antenna is aligned with the corner O to ensure that the straight line where the center of the beam is located passes through the corner O. In the experiment, the moving human body ...

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Abstract

The invention discloses a method for locating a concealed target at a corner of a single building based on an ultra-wideband multipath radar, and mainly solves the problem of locating a non-direct sight target in an urban environment. The present invention utilizes the multi-path diffraction characteristics of electromagnetic waves to locate hidden targets behind corners, and first uses moving target display technology to perform background cancellation to suppress strong background clutter, and uses a median filter algorithm to smooth the canceled echo signals Denoising processing, and then use the unit average constant false alarm detection to extract the peak value corresponding to the direct diffraction path and the side wall reflection path from the echo, and calculate the Finally, the α-β filtering method is introduced to improve the positioning accuracy of moving targets. The present invention has the advantages of simple realization process, small amount of calculation in the whole process of target position acquisition, and high target positioning accuracy. The invention can be applied to fields such as urban street fighting, anti-terrorist stability maintenance, disaster rescue and the like.

Description

technical field [0001] The invention belongs to the technical field of ultra-broadband multipath radar target positioning technology, and in particular relates to a corner concealed target positioning method in a single building corner scene. Background technique [0002] The field of ultra-wideband multipath radar target positioning technology mainly uses the specular reflection and diffraction of electromagnetic waves on the surface of buildings to detect, locate and track hidden targets located in the non-direct line of sight of radar. It has great application value. In a complex urban architectural environment, due to the shelter of buildings, electromagnetic waves cannot propagate to the target along a straight line, but due to the existence of a large number of electromagnetic wave reflection and diffraction propagation paths in the complex architectural environment, using these multi-path propagation mechanisms, the building can shield the target At the same time, co...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/88G01S7/41
CPCG01S7/411G01S13/888
Inventor 杨晓波李松林樊士豪高绪宇李虎泉崔国龙郭世盛王明阳孔令讲
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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