Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Frequency modulated continuous wave linear array amplitude-phase error correction method based on single dominant scattering center

A frequency modulation continuous wave, amplitude and phase error technology, applied in the field of amplitude and phase error correction of frequency modulation continuous wave line array based on single display point, can solve the problem of inapplicable multi-channel amplitude and phase error correction

Active Publication Date: 2014-07-23
INST OF ELECTRONICS CHINESE ACAD OF SCI
View PDF2 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are all based on the pulse system. Under the pulse system, there is no problem of nonlinear error of the transmitted signal. However, the FMCW system uses the de-slant method for reception. This de-slant reception method causes point target echoes at different distances. The nonlinear part of the signal has different forms, and obviously the above method is not suitable for multi-channel amplitude-phase error correction under the FMCW system

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
  • Frequency modulated continuous wave linear array amplitude-phase error correction method based on single dominant scattering center
  • Frequency modulated continuous wave linear array amplitude-phase error correction method based on single dominant scattering center
  • Frequency modulated continuous wave linear array amplitude-phase error correction method based on single dominant scattering center

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0024] Aiming at the problem that the nonlinear error of frequency modulation and multi-channel amplitude and phase errors exist in the frequency modulation continuous wave linear array imaging radar system, the quality of the reconstructed radar image is degraded by direct imaging, and a frequency modulation continuous wave based on a single characteristic point is proposed. Line array amplitude and phase error correction method. This method first corrects the frequency modulation nonlinear error signal in the echo, then uses RVP filtering to separate the frequency modulation nonlinear error from the multi-channel amplitude-phase error, and finally corrects the frequency modulation nonlinear error separately. The influen...

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 frequency modulated continuous wave linear array amplitude-phase error correction method based on a single dominant scattering center. The method includes the steps: firstly, correcting frequency modulated nonlinear error signals in echo waves; secondly, separating frequency modulated nonlinear errors from multichannel amplitude-phase errors by the aid of RVP (residual video phase) filter processing; finally, respectively correcting signals obtained after RVP filter processing of the frequency modulated nonlinear errors and the influence of the multichannel amplitude-phase errors to correct overall amplitude-phase errors of the echo waves received by a system. The method solves the problem that the quality of a reconstructed radar image is degraded due to direct imaging as a frequency modulated continuous wave linear array imaging radar system has the frequency modulated nonlinear errors and the multichannel amplitude-phase errors.

Description

Technical field: [0001] The invention relates to the technical field of frequency modulated continuous wave (Frequency Modulated Continuous Wave, FMCW) linear array synthetic aperture radar system, in particular to a method for correcting amplitude and phase errors of frequency modulated continuous wave linear array based on a single characteristic point. Background technique: [0002] The principle of Frequency Modulated Continuous Wave (FMCW) linear array synthetic aperture radar system (Synthetic Aperture Radar, SAR) is to transmit a large time-width-bandwidth linear frequency modulation signal in the range direction, and use pulse compression to obtain high resolution in the range direction Arrange the antenna array in the array direction, control the array elements to conduct sequentially through the switch network to complete the data collection in this direction, and then use aperture synthesis to obtain high resolution in the array direction. imaging. [0003] In th...

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 Applications(China)
IPC IPC(8): G01S7/40G01S13/90
CPCG01S7/40G01S13/90
Inventor 谭维贤杨晓琳乞耀龙王彦平洪文
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com