Phase-coherent accumulation detecting method capable of revising first-order and second-order range migration at the same time

A coherent accumulation and detection method technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of unknown and difficult to estimate target parameters, and achieve the effect of improving signal-to-noise ratio and target detection performance

Inactive Publication Date: 2015-02-18
XIDIAN UNIV
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can not only effectively eliminate the distance migration caused by the high-speed movement of the target, but also make the long-term accumulation of pulses no longer affected by the high-speed movement of the target. Signal-to-noise ratio, and wi

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
  • Phase-coherent accumulation detecting method capable of revising first-order and second-order range migration at the same time
  • Phase-coherent accumulation detecting method capable of revising first-order and second-order range migration at the same time
  • Phase-coherent accumulation detecting method capable of revising first-order and second-order range migration at the same time

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing:

[0024] refer to figure 1 , is a flowchart of a coherent accumulation detection method for simultaneously correcting first-order and second-order distance migration in the present invention. The coherent accumulation detection method for simultaneously correcting first-order and second-order distance migration includes the following steps:

[0025] Step 1, use the radar to transmit a signal to the target, and the signal transmitted by the radar is a chirp signal; use the radar to receive the echo signal containing the target, and perform Fourier transform (FFT processing) on ​​the echo signal in the fast time domain to obtain a fast The expression of the echo signal in the time-frequency domain; the expression of the echo signal in the fast time-frequency domain is obtained when only the first-order distance walking and the second-order distance bending are considered.

[...

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 belongs to the technical field of radar weak signal detection and particularly relates to a phase-coherent accumulation detecting method capable of revising first-order and second-order range migration at the same time. The method comprises the steps that echo signals are subjected to Fourier transform in a quick time domain, and a quick time frequency domain echo signal expression with only first-order range walking and second-order range curvature considered is obtained; through second-order keystone transform, the quick time frequency domain echo signal expression with only first-order range walking and second-order range curvature considered is subjected to second-order range curvature revising, and echo signals of a two-dimensional time domain obtained after second-order range curvature revising are obtained; through Hough transform, the echo signals of the two-dimensional time domain obtained after second-order range curvature revising are subjected to first-order range walking revising, and echo signals of time domains obtained after two-time range revising are obtained; and the echo signals of the time domains obtained after two-time range revising are subjected to pulse compression and phase-coherent accumulation detecting.

Description

technical field [0001] The invention belongs to the technical field of radar weak signal detection, in particular to a coherent accumulation detection method for simultaneously correcting first-order and second-order distance migration, and further relates to a simultaneous detection method based on keystone transform and Hough transform in the field of radar target detection Coherent accumulation detection method for correcting first- and second-order distance migration. The invention can eliminate the distance migration caused by the high-speed movement of the target in the air defense warning radar system, so as to improve the signal-to-noise ratio of the detected target, and can be used to solve the weak signal detection problem in the case that some radar moving target signal parameters are unknown or difficult to estimate. Background technique [0002] In recent years, with the development of radar technology, the defense capability and detection performance of homelan...

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): G01S7/41
CPCG01S7/411
Inventor 冯大政原英王伟赵雪玉冯祥卫侯瑞利
Owner XIDIAN UNIV
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