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

A Synthetic Aperture Radar Echo Simulation Method Applicable to Various Transmitted Signal Waveforms

A technology of synthetic aperture radar and signal transmission, which is applied in the directions of using re-radiation, radio wave measurement system, radio wave reflection/re-radiation, etc. It can solve the problems that are not conducive to the flexibility and fidelity of radar, and achieve flexible modeling Effect

Active Publication Date: 2019-03-01
NAT UNIV OF DEFENSE TECH
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The limitation on the transmit signal waveform is undoubtedly detrimental to the flexibility and realism of radar transmit signal modeling

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 Echo Simulation Method Applicable to Various Transmitted Signal Waveforms
  • A Synthetic Aperture Radar Echo Simulation Method Applicable to Various Transmitted Signal Waveforms
  • A Synthetic Aperture Radar Echo Simulation Method Applicable to Various Transmitted Signal Waveforms

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention will be further explained below in conjunction with the accompanying drawings. figure 1 The geometric schematic diagram of SAR imaging is shown in the three-dimensional geometric space. Without loss of generality, it can be assumed that the moving direction of the radar platform is the x-axis direction; the radar position coordinates are The coordinates of the scattering center are

[0024] The present invention is applicable to a synthetic aperture radar echo simulation method of various transmitted signal waveforms, and adopts five steps as shown in FIG. 3 .

[0025] Step 1: Set the radar transmission signal waveform s T (x,t r ), where t r Fast time for radar. Due to the motion of the radar platform, the x-coordinate of the radar position increases with the radar slow time t a And change. For a fixed radar position x-coordinate, s T (x,t r ) represents a specific slow time t a When the radar transmits the signal, its waveform can no...

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 relates to a synthetic aperture radar echo simulation method suitable for a plurality of emission signal waveforms. The method comprises the following steps: the step 1: setting radar emission signal waveform; the step 2: respectively performing the Fourier transform of each radar emission signal, and obtaining the radar emission signal frequency spectrum; the step 3: calculating a synthetic aperture radar transmission function; the step 4: multiplying the radar emission signal frequency spectrum obtained in the step 2 by the synthetic aperture radar transmission function obtained by the step 3, and obtaining the orientation time domain distance frequency domain spectrum of SAR echo signals; and the step 5: performing the inverse Fourier Transform of the obtained result along a distance frequency fr. The synthetic aperture radar echo simulation method suitable for a plurality of emission signal waveforms can flexibly select the emission signal waveform according to the real requirement to allow an SAR echo signal simulator to be more flexible and vivid for the modeling of the radar emission signals; and moreover, the modeling of the emission waveform, the radar work mode, the target scattering feature modeling and the modeling of the radar platform are relatively independent and have no mutual restriction.

Description

【Technical field】 [0001] The invention belongs to the field of synthetic aperture radar and signal processing, and in particular relates to a simulation technology of synthetic aperture radar echo signals, in particular to a synthetic aperture radar echo simulation method suitable for various transmission signal waveforms. 【Background technique】 [0002] Synthetic Aperture Radar (SAR) echo signal simulator plays an important role in researching SAR imaging algorithm and verifying SAR system scheme. At present, the existing SAR echo signal simulation technology can be used not only for traditional strip mode SAR, but also for multiple SAR data acquisition modes such as spotlight SAR and TopSAR; not only for traditional single-station SAR systems, but also for It is used in new system SAR systems such as dual-station SAR and SAR moving target indication. Some SAR echo signal simulation technologies consider factors such as secondary or multiple scattering of electromagnetic w...

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): G01S7/40G01S13/90
CPCG01S7/4052G01S13/90
Inventor 王伟刘永才冯德军饶彬傅其祥潘小义顾赵宇代大海常宇亮
Owner NAT UNIV OF DEFENSE TECH
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