Method for reconstructing target three-dimensional scattering center of inverse synthetic aperture radar

An inverse synthetic aperture and scattering center technology, applied in the field of three-dimensional scattering center reconstruction of targets based on inverse synthetic aperture radar, can solve the problems of large amount of calculation, inability to distinguish multiple objects with different heights, and multi-target prior information, etc., to achieve The effect of small amount of calculation

Inactive Publication Date: 2013-07-24
NORTHWESTERN POLYTECHNICAL UNIV
View PDF5 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the deficiencies of the prior art, the present invention provides a method for reconstructing the three-dimensional scattering center of the target by using the ISAR two-dimensional image sequence to overcome the

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
  • Method for reconstructing target three-dimensional scattering center of inverse synthetic aperture radar
  • Method for reconstructing target three-dimensional scattering center of inverse synthetic aperture radar
  • Method for reconstructing target three-dimensional scattering center of inverse synthetic aperture radar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] The method flowchart that the present invention proposes is as figure 1 As shown, when the rotational angular velocity of the target relative to the radar is approximately constant, the target is continuously observed, and the echo signal is imaged after motion compensation to obtain the ISAR two-dimensional image sequence of the target. And after longitudinal calibration, extract and match the scattering center in the ISAR two-dimensional image, and then calculate the displacement velocity field of the scattering center in the two adjacent ISAR two-dimensional images after matching, and introduce the projection equation and the target motion equation of the orthographic projection model Obtain the estimated value of the third-dimensional coordinate of the scattering center, and finally average the multiple estimated values ​​to obtain the final ...

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 method for reconstructing target three-dimensional scattering center inverse synthetic aperture radar. The method for reconstructing the target three-dimensional scattering center of the inverse synthetic aperture radar comprises the following steps: conducting continuous image formation on echo data after motion compensation so as to obtain an ISAR two-dimensional image sequence; respectively conducting horizontal scaling and vertical scaling on the information storage and retrieval (ISAR) two-dimensional image sequence so as to obtain a position coordinate of the scattering center; and respectively extracting a position coordinate of the scattering center in an ISAR two-dimensional image of each frame, calculating a displacement velocity field of every two adjacent frames of the scattering center of the ISAR two-dimensional image, combining projection equation and target motion equation of an orthographic projection model so as to obtain estimated values of a third dimension coordinate by combining a projection equation and a target motion equation of an orthographic projection model, and averaging multiple estimated values to obtain the final third dimension coordinate. Therefore, reconstruction of the target three-dimensional scattering center is completed directly. The method for reconstructing the target three-dimensional scattering center of the inverse synthetic aperture radar does not need cost of extra system hardware, can distinguish scattering centers with different heights in the same distance and position resolution unit, does not need to utilize prior information such as observation perspective of the radar, and has relatively small calculating amount.

Description

technical field [0001] The invention relates to the field of radar signal processing, in particular to a method for reconstructing a three-dimensional scattering center of a target based on an inverse synthetic aperture radar. Background technique [0002] The basic functions of modern radar have been extended from target detection and localization to feature acquisition and target recognition. The scattering center model of the radar target can reflect the geometrical structure characteristics of the target, and provides a concise and clear description method for the electromagnetic scattering phenomenon of the radar target. [0003] Compared with the one-dimensional and two-dimensional scattering center models, the three-dimensional scattering center model of the target can provide more abundant and accurate target feature information; in-depth research on the high-dimensional characteristics of the scattering center is also an important way to discover new mechanisms and ...

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
IPC IPC(8): G01S7/41G01S13/90
Inventor 何华兵谢松云许家栋李栋
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products