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

A bistatic isar imaging detection method for stealth aircraft

An imaging detection and aircraft technology, applied in measuring devices, radio wave measurement systems, radio wave reflection/re-radiation, etc., can solve the problem that stealth aircraft cannot be effectively identified by single-base ISAR, and achieve two-dimensional high-resolution, Good imaging focusing results, perfect effect of theoretical research

Active Publication Date: 2019-12-31
HEFEI UNIV OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a dual-base ISAR imaging detection method for stealth aircraft to solve the problem that stealth aircraft cannot be effectively identified by single-base ISAR

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
  • A bistatic isar imaging detection method for stealth aircraft
  • A bistatic isar imaging detection method for stealth aircraft
  • A bistatic isar imaging detection method for stealth aircraft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] like figure 1 As shown, a dual-base ISAR imaging detection method for stealth aircraft includes the following steps:

[0041] step one

[0042] The range-Doppler imaging algorithm is used to mathematically model the reflected echo signal of the observation target received by the bistatic ISAR.

[0043] The reflected echo signal formula is as follows:

[0044]

[0045] In formula (1), a r ( ) and a a ( ) are the window function and the azimuth window function of the radar chirp signal, respectively, t r is fast time, t m is slow time, R(t m ) is the instantaneous slope distance related to slow time, C is the speed of light, exp is the exponential function with the base of natural logarithm e, j is the imaginary unit, γ is the modulation frequency of the transmitted signal, and λ is the signal wavelength.

[0046] Step 2

[0047] After the echo signal is obtained, data processing including range compression, range migration correction and azimuth compression sh...

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 a bistatic ISAR (inverse synthetic aperture radar) imaging detection method for a stealth aircraft. The problem that the stealth aircraft cannot be effectively identified by monostatic ISAR is solved. A process is realized as follows: (1) point target echo information of the stealth aircraft is accurately expressed; (2) distance compression treatment is carried out; (3) calibration including range walk and range migration is carried out; (4) azimuth compression is completed to obtain an azimuth focus result; (5) two-dimensional inverse Fourier transform of distances and azimuths to signals is carried out, an imaging result with high resolution can be obtained when the transform in a two-dimensional time domain occurs. The bistatic ISAR imaging detection method disclosed by the invention has a high-resolution imaging result with a preferable focusing effect; by utilizing the imaging processing method of the bistatic ISAR, the stealth aircraft can be effectively detected.

Description

technical field [0001] The invention relates to the field of radar remote sensing signal processing and remote sensing imaging methods, in particular to a dual-base ISAR imaging detection method for stealth aircraft. Background technique [0002] As an all-weather, all-weather, long-distance information acquisition method, Inverse Synthetic Aperture Radar (ISAR) can complete the reconnaissance and surveillance tasks that are difficult for optical radar and infrared radar in complex environments, and obtain high-resolution ISAR 2D image. ISAR images can be used to identify and classify moving targets, battlefield early warning and surveillance, aircraft tower control and space target surveillance, etc., and have a wide range of military and civilian applications. [0003] Similar to the general bistatic radar, Bistatic Inverse Synthetic Aperture Radar (BiISAR) separates the transmitter platform and receiver platform of ISAR in different spatial positions, and uses backscatte...

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
CPCG01S7/41G01S13/904G01S13/9064G01S2013/029G01S13/9058
Inventor 周芳刘彦斌杨学志
Owner HEFEI UNIV OF TECH