Supercharge Your Innovation With Domain-Expert AI Agents!

A Method and Device for Correcting Synthetic Aperture Radar Echo Data

A technology of synthetic aperture radar and echo data, which is applied to measuring devices, radio wave reflection/re-radiation, radio wave measurement systems, etc., to achieve the effect of improving imaging quality

Active Publication Date: 2018-07-24
INST OF ELECTRONICS CHINESE ACAD OF SCI
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dead zone is an inherent problem of the pulse system, which is caused by the conflict between transmission and reception; because when transmitting a signal, in order to prevent the transmitted high-energy signal from entering the receiver, it will damage the receiving equipment that can only receive low-energy signals or cause the reception echo Saturation, the receiving subsystem must be turned off; at this time, a dead zone is formed

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 Method and Device for Correcting Synthetic Aperture Radar Echo Data
  • A Method and Device for Correcting Synthetic Aperture Radar Echo Data
  • A Method and Device for Correcting Synthetic Aperture Radar Echo Data

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0141] Example 1: point target simulation;

[0142] The simulated spaceborne SAR parameters are shown in Table 1:

[0143]

[0144]

[0145] Table 1

[0146] Under this parameter, the number of lost pulses for each slant distance is as follows: figure 2 As shown; the designed imaging scene is 21 point targets, specifically: 3 points in the distance direction × 7 points in the azimuth direction; the points located in the slant distance of 954km, 974km, and 995km respectively represent points in the extended blind area and points on the edge of the extended blind area, Points outside the dead zone are expanded. The direct imaging results without any preprocessing such as image 3 shown. Using the method provided by the present invention to focus on the point target, the final result is as follows Figure 4 shown. In order to suppress the height of the first side lobe and highlight the height of the grating lobe, a -30dB Taylor window was added to the processing.

...

example 2

[0149] Example 2: Spaceborne SAR measured data imaging;

[0150] Using the HJ1C spaceborne SAR system, artificially caused missing data in its echo data. Adopt direct imaging and the processing method of above-mentioned steps, carry out processing, processing result is as follows Image 6 , 7 shown. Image 6 The scene is a small island in the ocean, Figure 7 The scene for the urban area. like Image 6 (a), Figure 7 As shown in (a): without missing data recovery, after direct imaging, there will be blurs and grating lobes with different brightness around the strong point; Image 6 (b), Figure 7 As shown in (b): After the above processing method, the blur and grating lobes are obviously suppressed.

[0151] It can be seen from the above embodiments that the echo data in variable PRF mode can be accurately processed by using the method provided by the present invention.

[0152] The device for correcting SAR echo data provided by the embodiment of the present inventio...

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 present invention discloses a method of correcting synthetic aperture radar (SAR) echo data. The method comprises the steps of obtaining the missing data in the echo data to obtain the complete echo data; carrying out the range direction pulse compression on the complete echo data to obtain the data finishing the range direction pulse compression; reconstructing the data finishing the range direction pulse compression into the sampling data of uniform azimuth direction; calculating the product of the sampling data of uniform azimuth direction and a reference function, and carrying out the Stolt mapping on the obtained product to obtain a radar image. The present invention also discloses a device of correcting the SAR echo data.

Description

technical field [0001] The invention relates to a synthetic aperture radar (SAR, Synthetic Aperture Radar) echo signal processing technology, in particular to a method and device for correcting SAR echo data. Background technique [0002] SAR is an important earth-observing radar, which can perform imaging all-weather and all-weather; the new generation of SAR remote sensing system focuses on high-resolution and wide swath imaging. With the expansion of the surveying zone, traditional SAR ignores the problem of not being able to image in the blind area and becomes a prominent problem. The dead zone is an inherent problem of the pulse system, which is caused by the conflict between transmission and reception; because when transmitting a signal, in order to prevent the transmitted high-energy signal from entering the receiver, it will damage the receiving equipment that can only receive low-energy signals or cause the reception echo Saturation, the receiving subsystem must be...

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): G01S7/292G01S13/90
CPCG01S7/2923G01S13/90G01S13/9004
Inventor 王翔宇王宇邓云凯张志敏王伟李宁
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com