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

Double-threshold constant false alurm motion target detecting method of double base synthetic aperture radar

A technology for synthetic aperture radar and moving targets, which is applied in measuring devices, radio wave measurement systems, radio wave reflection/re-radiation, etc., and can solve problems such as signal-to-noise ratio degradation, detection performance deterioration, and fast-moving target failure

Inactive Publication Date: 2007-07-18
TSINGHUA UNIV
View PDF0 Cites 61 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, this method is based on the phase analysis of the azimuth signal in the long coherent processing time, so it is required that the moving target cannot span multiple range units in the processing time, which makes these methods invalid for fast moving targets
The traditional processing method is to reduce the range resolution, that is, to merge adjacent range cells, which will lead to a decrease in the signal-to-noise ratio and a deterioration in detection performance

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
  • Double-threshold constant false alurm motion target detecting method of double base synthetic aperture radar
  • Double-threshold constant false alurm motion target detecting method of double base synthetic aperture radar
  • Double-threshold constant false alurm motion target detecting method of double base synthetic aperture radar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] First, a model of the problem is given. Figure 1 shows a schematic diagram of a side-looking co-orbit bistatic SAR. The X axis represents the azimuth direction, the Y axis represents the distance direction, and the Z axis represents the vertical direction. The radar transmitter Tr and the receiver Re move along the X-axis at the same speed v. In the X-Y plane, there is a target P in the detection time interval [-T / 2, T / 2] at a constant speed (v x , v y )sports. When azimuth time t=0, the transmitter is located at (0, y Tr , H t ), the receiver is located at (0, 0, H r ), P is located at (x 0 , y 0 ). According to the geometric relationship, it can be known that the instantaneous distance functions of the target P and the transmitter and receiver are respectively:

[0042] R T ( t ) = [ x ...

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

A detection method of double-threshold constant false alarm movement object on double-base synthetic aperture radar includes finalizing distance compression of various pulse-sampling, dividing orientation time to be multiple CPI, carrying out FFT in each CPI to enter orientation frequency domain, comparing data amplitude of frequency channel at external of clutter region with the first threshold and outputting point trace, making coagulation on point trace, making Hough transform in point trace domain and making decision of the second threshold.

Description

technical field [0001] The invention relates to a double-threshold constant false alarm moving target detection method for bistatic synthetic aperture radar. Background technique [0002] Synthetic Aperture Radar (SAR) has excellent characteristics such as all-weather, all-weather, and penetrability. It is widely used in civil and military fields such as navigation, remote sensing, mapping, reconnaissance, warning, and fire control. In recent years, with the continuous development of technology and the increasing demand, the detection of moving targets from SAR echo signals has become a research hotspot in the field of multi-modal SAR, a new system at home and abroad. At the same time, bistatic SAR is also getting more and more attention. Compared with monostatic radar, bistatic SAR has better "four-antibody" performance. ONERA / DLR and FGAN successfully completed the same-speed parallel-orbit airborne bistatic SAR imaging experiments on stationary scenes in February and Oct...

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
IPC IPC(8): G01S13/90G01S7/292G01S7/32
Inventor 李刚彭应宁许稼王秀坛戴喜增
Owner TSINGHUA UNIV
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