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

Separation of fretting parts and characteristic parameter estimation method of terahertz isar target

A characteristic parameter and terahertz technology, which is applied in the field of inverse synthetic aperture radar micro-moving target imaging and characteristic parameter estimation, can solve problems affecting imaging quality and other issues

Active Publication Date: 2021-04-02
SHANGHAI RADIO EQUIP RES INST
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For rigid objects, the imaging resolution can be greatly improved; however, due to the high resolution, the micro-motion will be more obvious in the terahertz frequency band, which affects the imaging quality on the one hand, and is an important identification basis on the other hand

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
  • Separation of fretting parts and characteristic parameter estimation method of terahertz isar target
  • Separation of fretting parts and characteristic parameter estimation method of terahertz isar target
  • Separation of fretting parts and characteristic parameter estimation method of terahertz isar target

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The invention provides a terahertz ISAR target micro-motion component separation and characteristic parameter estimation method, aiming to solve the problems of ISAR imaging quality reduction and micro-motion characteristic parameter estimation difficulties caused by the micro-motion of the target component in the terahertz band, and proposes a method based on Radon A technical solution for envelope separation and parameter estimation of transformed micro-moving components, and at the same time realize ISAR imaging of micro-moving targets.

[0028] (1) Envelope separation method of micro-moving parts based on Radon line detection

[0029] The main forms of fretting include vibration, rotation and coning, etc., and the form of instantaneous distance caused by it can be uniformly written as

[0030] R mic (t)=A sin(ω·t+φ) (1)

[0031] Assume that the radar transmits a chirp signal and performs pulse compression by dechirp. If the target contains P scattering points, th...

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 provides a Terahertz ISAR object micro-motion part separating and characteristic parameter estimation method, aims at solving the problems that ISAR imaging quality is reduced and micro-motion characteristic parameters are hard to estimate due to micro-motion of an object part, provides a Radon transformation based envelop separated and parameter estimating technical schemes of the micro-motion part, and realizes ISAR imaging of the micro-motion object. The method of the invention can be used to improve the identification and interpretation capability for an unknown non-cooperated target of modern radar, and has practical application prospects.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and specifically relates to an inverse synthetic aperture radar (ISAR) micro-moving target imaging and characteristic parameter estimation method for the terahertz band. Background technique [0002] As an important means of observation in space, air and sea, ISAR imaging technology plays an irreplaceable role in the detection and surveillance of non-cooperative military targets. In response to the increasing demand for fine detection, ISAR is developing in the direction of high-resolution imaging, multi-dimensional feature extraction and target recognition. [0003] In the detection and recognition of non-cooperative targets, the non-moving characteristics such as the shape, structure and surface material electromagnetic parameters of the target usually have high requirements for prior information, and their practicability is very limited. Due to the unique form of expression, i...

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): G01S13/90
CPCG01S13/90G01S13/9064
Inventor 盛佳恋付朝伟倪亮杨成山王平
Owner SHANGHAI RADIO EQUIP RES INST