Bistatic ISAR Image Fusion Method Based on Subaperture Parameter Estimation

A technology of parameter estimation and image fusion, which is used in the reflection/re-radiation of radio waves, the use of re-radiation, measurement devices, etc. Advanced problems, to achieve the effect of improving the signal-to-noise ratio and image quality, high image fusion quality, and long operating distance

Active Publication Date: 2011-12-21
XIDIAN UNIV
View PDF3 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts the single-base ISAR system of sending and receiving, which makes this method have many shortcomings in practical application:
[0005] 1. Due to the single-base ISAR model, its action distance is short, and its ability to resist interference and obtain target information is low;
[0006] 2. Due to the one-send-one

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
  • Bistatic ISAR Image Fusion Method Based on Subaperture Parameter Estimation
  • Bistatic ISAR Image Fusion Method Based on Subaperture Parameter Estimation
  • Bistatic ISAR Image Fusion Method Based on Subaperture Parameter Estimation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0034] Step 1. Build the bistatic radar turntable model

[0035] Assuming that the translation component between the radar and the target can be accurately compensated, and the counterclockwise rotation direction is positive, the bistatic ISAR radar model is established as figure 2 As shown, the target echo data of radar 1 and radar 2 is obtained by using the bistatic ISAR system of one transmission and two receptions, radar 1 transmits signals, and radar 1 and radar 2 receive signals at the same time;

[0036] figure 2 Middle R T , R R are the distance vectors from radar 1 and radar 2 to the target rotation reference point O, and their modulus are R T , R R , and the unit vectors are and And the included angle with the ground is θ T and θ R , the sum...

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 inverse synthetic aperture radar (ISAR) image fusion method based on sub aperture parameter estimation, which mainly solves the problem of low efficiency of the existing bistatic ISAR image fusion and has a realization process comprising the following steps of: building a bistatic radar turntable model; obtaining the target distance Doppler image of two radars; using the Doppler difference values of isolated strong scattering points at different sub apertures for estimating the target rotating angle speed; then, carrying out orientation calibration accordingto the obtained target rotation angle speed; estimating the half bistatic angle through the conversion relationship between coordinate systems; carrying out distance direction matching filtering and motion compensation on data of the two radars; then, adopting a back propagation (BP) algorithm for carrying out compensation on the echo phase according to the estimated half bistatic angle and the target rotating angle speed; and mapping the data of the radar 1 and the radar 2 after the compensation completion to the same rectangular coordinate system for carrying out coherent fusion. The theoretical analysis and experiment results show that the method of the invention can obtain images with better effects, can obtain more target information and can be used for target identification.

Description

technical field [0001] The invention belongs to the technical field of inverse synthetic aperture radar, and further relates to a bistatic inverse synthetic aperture radar image fusion method based on sub-aperture parameter estimation, which can obtain target images under multiple viewing angles and richer target information. Background technique [0002] Inverse synthetic aperture radar (ISAR) has the characteristics of all-weather, all-time and long-distance observation. It can perform high-resolution imaging and identification of targets, and obtain relevant information, which plays a key role in modern warfare. Compared with monostatic inverse synthetic aperture radar, bistatic radar has the characteristics of longer range, stronger anti-jamming and information acquisition capabilities. Through multiple radar systems, the target images obtained from different viewing angles are fused to obtain higher-quality images and richer target information. [0003] Many existing 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
IPC IPC(8): G01S13/90G01S7/41G01S7/36
Inventor 李亚超许然邢孟道全英汇徐炜周瑞雨
Owner XIDIAN 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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap