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Concealed target positioning method for single building wall 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 achieve the effects of improving target positioning accuracy, high practicability, and simple implementation process.

Active Publication Date: 2019-04-19
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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  • Concealed target positioning method for single building wall corner
  • Concealed target positioning method for single building wall corner
  • Concealed target positioning method for single building wall corner

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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 concealed target positioning method for a single building wall corner based on an ultra-wide band multi-path utilization radar. The main aim is to realize positioning for a non-direct-viewing target in a city environment. The multi-path diffraction feature of electromagnetic waves is used for positioning a concealed target behind the corner, firstly, a moving target display technology is adopted for background compensation to restrain strong background clutters, a median filtering algorithm is used for conducting smooth denoising processing on compensated echo signals, then by the utilization of unit average constant false alarm detection, peak values corresponding to a direct diffraction path and a side wall reflection path are extracted from the echo signals, according to the geometrical relation of the two paths, in combination with the clear position of the radar and building layout information, the position of the target is worked out, and finally alpha-beta filtering method is introduced to improve the positioning precision of the moving target. The concealed target positioning method has the advantages that the realizing process is simple, the wholeprocess of obtaining the position of the target is small in calculation amount, and the high positioning precision for the target is realized. The concealed target positioning method can be applied to the fields of city street fighting, terrorism combating, stability safeguarding, disaster rescue and others.

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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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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