Multi-target point trajectory gathering method for forming target point trajectory

A technology of dot condensing and target dot marking, which is applied in the field of identification of friend or foe, and can solve problems such as misjudgment

Inactive Publication Date: 2015-09-23
10TH RES INST OF CETC
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the interrogator interrogates multiple targets, within the range of a beam, the response signals of multiple targets will enter the interrogator at the same time, and the response signa

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
  • Multi-target point trajectory gathering method for forming target point trajectory
  • Multi-target point trajectory gathering method for forming target point trajectory
  • Multi-target point trajectory gathering method for forming target point trajectory

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] exist figure 1 The superposition of multiple groups of signals of dense targets and the formation of false targets are shown in the figure, which shows several situations of cluttering. The response signal is a combination of multiple pulses. The pulse width and the interval between pulses are specified by the signal format. The response signal includes: two frame pulses, 12 information pulses and an 'X' extension bit. 'Confusion' is a kind of interference inside the identification friend or foe system. When there are more than two targets on the inquiring azimuth, the receiver will receive more than two sets of reply signals synchronously. When the distance between the targets is less than 3 kilometers, these reply signals will be Crossed together, the resulting pulses overlap or interleave, this interference is called 'scrambling'. Confusion will form false targets under the following conditions:

[0027] l The distance between two groups of reply signals is less th...

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 a multi-target point trajectory gathering method for forming a target point trajectory, and aims to provide a multi-target point trajectory gathering method which can be used to effectively separate multiple targets, eliminate interference signals, and accurately form a target point trajectory. The method of the invention is realized by the following technical scheme: after a response signal is received by an interrogation antenna, an interrogator separates overlapping signals based on the sum-difference ratio and the amplitude difference between the front and back edges of signal pulse, and the interrogator uses the amplitude ratio SDR of sum and difference signals to eliminate sidelobe interference signals and part of multipath interference signals according to the characteristics of an antenna pattern; whether two framework pulses are overlapping pulses is judged, and the over-wide pulse of which the front and back edges are inconsistent in amplitude is separated into two framework pulses; a set of data with correct framework and low confidence is decoded; and finally, multiple interrogation results of the same target within the scope of one beam are gathered by a density point trajectory association method. By adopting the method of the invention, the problem that it is impossible to identify all targets as the targets are too dense is solved.

Description

technical field [0001] The present invention relates to a method for agglomerating multi-target traces in a friend-or-foe identification system. More specifically, the present invention is a friend-or-foe identification method for accurate identification of multiple targets by adopting techniques such as eliminating interference, measuring angles, and spot correlation. Background technique [0002] The early identification friend or foe system can only be used in conjunction with radar. After the radar finds the target, it will inquire and identify it according to the azimuth and distance of the target. Over-The-Horizon Radar (OTHR) utilizes the ionosphere's reflection effect on high-frequency electromagnetic waves to achieve target detection. Due to the complexity of the structure of the ionosphere, electromagnetic waves often have multiple propagation modes between the radar and the target. It causes a target to generate multiple measurement signals on the radar, which ma...

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): G01S13/78
CPCG01S13/78
Inventor 唐大宇兰鹏王亚涛黄晓卿潘向荣王宜柳兵
Owner 10TH RES INST OF CETC
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