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

Method for extracting micro-Doppler parameters of precession cone target under foresight condition

A parameter extraction and micro-Doppler technology, used in climate sustainability, instrumentation, ICT adaptation, etc., can solve the problems of inability to effectively obtain micro-motion features, limit the size and purity of the mode number, and improve target detection capabilities. The effect of overcoming the difficulties of co-processing

Pending Publication Date: 2022-08-05
AIR FORCE UNIV PLA
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the angular Doppler frequency shift is closely related to the number of modes. The larger the number of modes, the greater the angular Doppler. The vortex electromagnetic waves used in the field of radar imaging and identification are generated by circular arrays, and the number of array elements increases. more, the greater the number of modes that can be generated, the size of the array limits the size and purity of the number of modes. In the case of a limited array size, the micro-motion characteristics of the target cannot be effectively obtained by using the vortex electromagnetic wave radar. Therefore, the vortex electromagnetic wave radar micro There are still many problems to be solved in the dynamic feature extraction method

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
  • Method for extracting micro-Doppler parameters of precession cone target under foresight condition
  • Method for extracting micro-Doppler parameters of precession cone target under foresight condition
  • Method for extracting micro-Doppler parameters of precession cone target under foresight condition

Examples

Experimental program
Comparison scheme
Effect test

example

[0163] Example: Simulation Experiment of Precession Cone Target Parameter Extraction Method under Forward-Looking Conditions

[0164] Simulation experiment: This section analyzes the effectiveness of the proposed parameter extraction method. The parameter settings of radar and target are shown in Table 1.

[0165] Table 1 Simulation parameter settings

[0166]

[0167] Simulation 1: In order to verify the correctness of the above derivation process, a scattering point is set for rotation, the rotation center is (2Km, π / 30rad, π / 3rad), the rotation radius is 1m, the rotation frequency is 6Hz, and the antenna rotation radius is 10m, the rotation frequency is 2Hz, the operating frequency of the radar is 75GHz, the bandwidth is 100MHz, and the radar irradiation time is 1s. Fig. 3(a) shows the echo micro-Doppler curve of a single scatter point, Fig. 3(b) shows the theoretical micro-Doppler curve of a single scatter point, the peak of the curve in Fig. 3(a) is 33.33 Hz , the pe...

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 precession cone target parameter extraction method under a foresight condition comprises the following steps: (1) constructing a radar observation model, obtaining scattering point echoes of a precession cone target, multiplying an echo signal by a phase compensation function Scom (tm), and eliminating a micro-Doppler component brought by rotation of an antenna; applying an EMD method to the echo signal after phase compensation to obtain a plurality of intrinsic mode functions (IMFs), extracting each IMF frequency, and realizing effective estimation of a target coning frequency; (2) carrying out time-frequency analysis on the echo after phase compensation to obtain a micro-Doppler curve, and carrying out skeleton extraction on the curve to improve the estimation precision; a broadband radar is arranged at the original point, a high-resolution one-dimensional distance sequence of scattering points is obtained, and geometric parameters and motion parameters of the precession cone target are jointly estimated by combining the coning frequency, the high-resolution one-dimensional distance image and the peak value of the micro-Doppler curve obtained in the above steps. The method can overcome the defect that a single-base radar cannot effectively extract the target micro-Doppler parameters under the condition that the micro-motion plane is perpendicular to the radar sight line direction.

Description

technical field [0001] The invention relates to a signal and information processing technology, in particular to a new method for extracting micro-Doppler parameters of a precession cone target under forward-looking conditions. Background technique [0002] Micro-Doppler is considered to be a unique feature of micro-moving targets. The micro-Doppler effect can be used to achieve complex recognition of cone-shaped targets. However, it is difficult to effectively extract micro-motion features perpendicular to the direction of the radar line of sight. Radars used to extract the fretting features of cone targets can be divided into traditional plane wave radars and vortex electromagnetic wave radars with wavefront phase modulation. Traditional plane wave radars can be divided into monostatic radars and bi / multistatic radars. Monostatic radars can extract radial fretting features, but for fretting components perpendicular to the direction of the radar line of sight, the Doppler f...

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 Applications(China)
IPC IPC(8): G01S7/292G01S7/35G01S7/41
CPCG01S7/2923G01S7/354G01S7/415Y02A90/10
Inventor 张群王志浩罗迎梁佳王聃袁航李文哲
Owner AIR FORCE UNIV PLA
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