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

SAR (synthetic aperture radar) echo simulating method based on GPU (graphics processing unit) parallel computing

A parallel computing and echo simulation technology, applied in the field of signal processing, to achieve high-precision phase simulation, improve echo simulation speed, and easily add error models.

Active Publication Date: 2014-12-24
INST OF ELECTRONICS CHINESE ACAD OF SCI
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects of the existing technology and solve the contradiction between the speed and accuracy of the current interference SAR echo simulation, the present invention proposes a SAR echo simulation method based on GPU parallel computing, which improves the interference SAR echo simulation speed

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
  • SAR (synthetic aperture radar) echo simulating method based on GPU (graphics processing unit) parallel computing
  • SAR (synthetic aperture radar) echo simulating method based on GPU (graphics processing unit) parallel computing
  • SAR (synthetic aperture radar) echo simulating method based on GPU (graphics processing unit) parallel computing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] like figure 1 As shown, a fast simulation method for SAR echoes based on GPU parallel computing, the implementation of this method is a three-layer loop, the number of outermost loops is the number of azimuth sampling points, and the inner two-layer loop is used to calculate the azimuth echo, followed by The azimuth echo is convolved with the transmitted signal, which is performed in the outermost loop. Like the two-dimensional time-domain algorithm, the azimuth echo signal operation is mapped to the two-dimensional thread grid, and the outer loop is realized by calling the kernel function multiple times. Assume that the sampling points of the echo data in the azimuth direction and the range direction are N respectively a and N r , then N can be turned on in the GPU a ×N r threads to compute the azimuth echo signals in parallel, taking into account antenna pattern gain and Doppler phase contributions. Call the GPU kernel function to traverse the azimuth time, so as...

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 provides an SAR (synthetic aperture radar) echo simulating method based on GPU (graphics processing unit) parallel computing, overcomes defects on influencing SAR echo simulating speed and accuracy, and improves influencing SAR echo simulating speed. The method includes the steps of setting up scene scattering point mesh generation and making sure position relation of double antenna SAR and scene targets; building up backscattering coefficient model, and generating correlated backscattering coefficient pairs according to sight relation of double antenna SAR and ground scene so as to complete backscattering coefficient computing; calculating positioning echo signals in SAR irradiating area; performing convolution to positioning echo signals acquired in step 3 and transmitting signals to acquire current pulsing echo signals; and going through all positioning times to acquire SAR echo data influenced by double antenna in the whole scene.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and relates to a SAR echo simulation method based on GPU parallel computing. Background technique [0002] Interferometric SAR echo signal simulation, based on the principle of SAR data acquisition, uses computer simulation of multi-channel original echo data, and plays an important role in system parameter design and verification, SAR imaging processing algorithm verification, interference processing algorithm verification, interferometric SAR performance analysis, etc. important role. [0003] A lot of research has been done on SAR echo simulation at home and abroad, which can be divided into two-dimensional time domain algorithm, one-dimensional frequency domain algorithm, two-dimensional frequency domain algorithm and inverse imaging echo algorithm. The two-dimensional time-domain algorithm is a complete time-domain calculation algorithm, which is often used in the simulation of po...

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): G01S7/40
Inventor 汪丙南韦立登向茂生梁兴东丁赤飚
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