A synthetic aperture radar azimuth signal reconstruction method and device

A synthetic aperture radar and azimuth signal technology, which is applied in measuring devices, instruments, and using re-radiation, can solve the problems of loss of signal-to-noise ratio, failure, etc., and achieve the effects of improving SNR, improving quality, and improving azimuth ambiguity

Active Publication Date: 2020-01-21
INST OF ELECTRONICS CHINESE ACAD OF SCI
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the classic azimuth signal reconstruction algorithm is based on the inversion of the channel transfer function matrix. This method can effectively complete the reconstruction of the azimuth signal when the non-uniform sampling is not serious, but in the case of severe non-uniform sampling, it will be serious. loss of signal-to-noise ratio, or even complete failure in the presence of data redundancy

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 synthetic aperture radar azimuth signal reconstruction method and device
  • A synthetic aperture radar azimuth signal reconstruction method and device
  • A synthetic aperture radar azimuth signal reconstruction method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0053]In the embodiment of the present invention, according to the first channel transfer function matrix, the SNR amplification factor of the first channel transfer function matrix is ​​determined, and the equivalent Doppler bandwidth is determined according to the SNR amplification factor; according to the equivalent Doppler bandwidth and The first channel transfer function matrix determines the second channel transfer function matrix corresponding to each Doppler frequency point; according to the second channel transfer function matrix corresponding to each Doppler frequency point, and the pre-measured aliasing spectrum and The original spectrum corresponding to the aliased spectrum determines a spectrum filter for extracting the Doppler spectrum, and the spectrum filter is used for extracting the Doppler spectrum in the azimuth signal.

[0054] Below in conjunction with embodiment the present invention is described in further detail.

[0055] The synthetic aperture radar a...

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

An azimuth signal reconstruction method for a Synthetic Aperture Radar (SAR) is provided. A first Signal Noise Ratio (SNR) amplification factor of a first channel transfer function matrix is determined according to the first channel transfer function matrix, and an equivalent doppler bandwidth is determined according to the SNR amplification factor; a second channel transfer function matrix corresponding to each doppler frequency point is determined according to the equivalent doppler bandwidth and the first channel transfer function matrix; and a spectrum filter for extracting a doppler spectrum is determined according to the second channel transfer function matrix corresponding to each doppler frequency point, a premeasured aliasing spectrum and an original spectrum corresponding to the aliasing spectrum, the spectrum filter being configured to extract the doppler spectrum in an azimuth signal. An azimuth signal reconstruction device for the SAR is further provided.

Description

technical field [0001] The present invention relates to a Synthetic Aperture Radar (SAR, Synthetic Aperture Radar) technology, in particular to a SAR azimuth signal reconstruction method and device. Background technique [0002] Multi-channel technology has very important applications in technologies such as spaceborne SAR high-resolution wide swath imaging, interference imaging and moving target detection. SAR azimuth signal reconstruction technology is one of the key technologies of multi-channel technology. Considering non-uniform sampling The azimuth signal reconstruction method in this case is of great significance to SAR imaging. [0003] At present, the classic azimuth signal reconstruction algorithm is based on the inversion of the channel transfer function matrix. This method can effectively complete the reconstruction of the azimuth signal when the non-uniform sampling is not serious, but in the case of severe non-uniform sampling, it will be serious. loss of sign...

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): G01S13/90
CPCG01S13/90G01S13/9011G01S7/40G01S13/904
Inventor 刘娜王宇邓云凯赵硕王翔宇
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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