Unlock instant, AI-driven research and patent intelligence for your innovation.

An adaptive processing method for high-resolution imaging of terahertz radar

A technology of imaging method and processing method, which is applied in the direction of using re-radiation, reflection/re-radiation of radio waves, instruments, etc., can solve the problems of unqualified imaging results and low efficiency, and achieve moderate selection speed, fast imaging speed, Identify the effect with high accuracy

Active Publication Date: 2022-05-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the identification of whether the imaging result is unqualified mainly depends on the observation of the human eye, which is inefficient.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An adaptive processing method for high-resolution imaging of terahertz radar
  • An adaptive processing method for high-resolution imaging of terahertz radar
  • An adaptive processing method for high-resolution imaging of terahertz radar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] The measured data is collected by a 0.34THz radar system with a working bandwidth of 28.8GHz. The J15 aircraft model is used as the CSAR imaging target, and its size is 44.5cm×30cm. The size ratio of the aircraft model to the real aircraft is 1:50. The target is placed on a foam platform 4.02 meters away from the radar antenna, and the relative height to the radar antenna is 0.42m. The near angle of oblique angle from the radar antenna to the center of the foam platform is 6°. The radar angular velocity is 4° / s, the carrier is 322.02GHz, the bandwidth is 28.8GHz, the pulse width is 0.3ms, the fast time sampling frequency is 1.5625MHz, and the pulse repetition frequency is 1000Hz.

[0114] The existing adaptive sub-aperture division method based on sub-aperture adjacent cross-correlation coefficient is used for the echo data, and high-resolution imaging is performed according to the obtained sub-aperture. The imaging results are shown in the attached figure 2 . The ...

Embodiment 2

[0117] The measured data is collected by a 0.34THz radar system with a working bandwidth of 28.8GHz. Use the revolver model as a CSAR imaging target. The target is placed on a foam platform at a distance of 3.85 meters from the radar antenna. The radar angular velocity is 8° / s, the carrier is 322.02GHz, the bandwidth is 28.8GHz, the pulse width is 0.3ms, the fast time sampling frequency is 1.5625MHz, and the pulse repetition frequency is 1000Hz.

[0118] Use the high-resolution imaging method after the adaptive processing method described in steps (1) and (2) to this echo data, and the imaging results are shown in the attached Figure 4 , The imaging process does not require human participation at all. Use the adaptive processing method described in step (3) to adaptively identify sidelobe defocus on the imaging result, and the result returns 0 (FALSE).

[0119] The sub-aperture division method of average sub-aperture division adopted by traditional microwave radar is used f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an adaptive processing method for terahertz radar high-resolution imaging. For the existing terahertz radar high-resolution imaging methods, there are parameters that need to be manually adjusted, and the problems that unqualified images need to be manually judged during batch processing. This method adopts the coefficient of variation of the nearby echo energy for each angle to adaptively identify whether the angle can be used as the sub-aperture boundary instead of the original energy threshold. This method sequentially uses different thresholds to segment the background and the target, and adopts the method of counting the number of isolated connected regions that will not be merged with other connected regions after the closed operation in the target image, and adaptively obtains the optimal segmentation threshold. This method uses the method of finding the pixel with the maximum value in the 8-neighborhood in the best segmented target image, and decomposes the imaging result into scatter point groups. And adopt the method of identifying whether there are isolated scattered points arranged in a line in the target image according to the positional relationship of the scattered points to adaptively select unqualified images.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and relates to an adaptive processing method for terahertz radar high-resolution imaging. Background technique [0002] The usual imaging method of terahertz radar high-resolution imaging is to use CSAR mode to collect data, then divide the circular aperture of CSAR imaging into adaptive sub-apertures, and image the sub-apertures separately, and finally fuse the sub-images. Different from microwave radar high-resolution imaging, terahertz radar high-resolution imaging does not need to increase the resolution of sub-images. However, due to the stronger anisotropy of scattered energy in the terahertz frequency band, high-resolution imaging of terahertz radar requires a special sub-aperture division method to solve its unique problems of severe sidelobe defocusing and loss of details. The main difference between the high-resolution imaging methods of various terahertz radars is also...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G01S7/41
CPCG01S13/9088G01S13/9094G01S7/418
Inventor 李晋曾梧桐皮亦鸣闵锐程添
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com