Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

ISAR radar imaging method applied to signal deletion occasions

A signal-missing, radar imaging technology, applied in the direction of utilizing re-radiation, reflection/re-radiation of radio waves, measuring devices, etc., can solve problems such as blurring, ISAR image damage, etc.

Active Publication Date: 2017-11-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF4 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Echo processing will zero out the damaged or missing pulse data, and the traditional Fourier transform-based radar imaging method is used for imaging, and the obtained ISAR image is usually damaged or blurred

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
  • ISAR radar imaging method applied to signal deletion occasions
  • ISAR radar imaging method applied to signal deletion occasions
  • ISAR radar imaging method applied to signal deletion occasions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] The effectiveness of the proposed method of the present invention is described in detail below through an imaging example in conjunction with the accompanying drawings:

[0056] Refer to attached figure 1 , the specific implementation steps of the present invention are as follows:

[0057] Step 1. Bistatic ISAR Target Echo Signal Analysis

[0058] Assuming that the echo data has been compensated for translation, the equivalent turntable target imaging is analyzed as an example. The geometric relationship between the radar and the target in the imaging plane is shown in the attached image 3 shown. Assume that the target coordinate system in the radar imaging plane is XOY, and the reference coordinate system is X s OY s , where X s The positive direction of the axis coincides with the equivalent radar line of sight direction, which is the observation distance direction, Y s The axis is the viewing direction. Target at X s OY s The electromagnetic scattering dist...

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 belongs to the radar signal processing technology field and relates to an ISAR radar imaging method applied to signal deletion occasions. Sparsity generated by the effect of the imaging space on an emission signal is fully utilized, sparse sampling of echo of partial-loss double base ISAR is carried out to acquire measurement data, a sparse base is constructed in an imaging plane, and a high precision estimation value of imaging point space distribution is acquired through a reconstruction algorithm. The method is advantaged in that multiple restrictions based on a Fourier transform algorithm are solved, even under the condition of incomplete echo signals, the effect of target space distribution on the emission signal is utilized to construct the sparse base, only small-amount echo data is utilized, target space distribution characteristics can be reconstructed, imaging quality is almost not influenced by a large double base included angle, the imaging result has no radar sidelobe clutter interference, and super-resolution imaging can be realized.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and relates to an ISAR radar imaging method for lack of signals. Background technique [0002] Inverse synthetic aperture radar can acquire high-resolution moving target images all-weather and all-weather, and has a wide range of applications in military and civilian fields, such as target scattering mechanism analysis and target detection and classification. Compared with the conventional monostatic ISAR, the bistatic ISAR that separates the radar transmitter and receiver in different spatial positions has the following advantages: high security and concealment, strong anti-interference ability; Placed at the rear; the acquired information is rich, it can not only obtain the forward scattering information of the target, but also configure multiple receivers for interference processing. Like monostatic ISAR, bistatic ISAR images can also be easily obtained by the commonly used ra...

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 Applications(China)
IPC IPC(8): G01S13/90G01S7/41
CPCG01S7/41G01S13/904G01S13/9064G01S13/9058
Inventor 范录宏刘东圣皮亦鸣曹宗杰李晋闵锐
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com