Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for positioning external radiation source weak target based on multi-signal fusion

A technology of external radiation source and weak target, applied in the direction of radio wave reflection/re-radiation, utilization of re-radiation, measurement devices, etc., can solve the problems of limited power of single irradiation source, limited working distance, positioning accuracy and detection performance

Active Publication Date: 2018-12-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of limited operating distance, positioning accuracy and detection performance due to the limited power of a single irradiation source, and researches the method of multi-signal fusion external radiation source weak target positioning based on RFT transformation to realize multi-signal fusion A method to realize the localization of external radiation source

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 positioning external radiation source weak target based on multi-signal fusion
  • Method for positioning external radiation source weak target based on multi-signal fusion
  • Method for positioning external radiation source weak target based on multi-signal fusion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0100] In this embodiment, the target is detected when the signal-to-noise ratio of the received target signal is SNR=-56dB.

[0101] The method of embodiment is attached Figure 4 As shown, the radar system is attached as figure 1 The one shown is composed of a main antenna and a monitoring antenna. The monitoring antenna receives the direct wave of the signal source, and the main antenna receives the target echo.

[0102] Consider that the signal source uses satellite TV signal (DVB-S signal), symbol rate R s =27.5MHz, five-way QPSK signal carrier frequency f ck =[500,540,580,620,660]MHz, receiver sampling rate f s =55MHz, the accumulation time is T=100ms.

[0103] Suppose the target is about d from the receiving station act =2.181km, the corresponding echo delay is about τ 0 =7.27μs, the target flies horizontally to the receiving station at a constant speed, taking the first signal as a reference, design △a τ =2×10 -8 . The target movement corresponds to the delay ...

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 external radiation source radar positioning, and relates to a method for positioning an external radiation source weak target based on multi-signal fusion. According to the invention, received multi-channel echo signals and direct wave signals are subjected to FDPC process to complete frequency domain pulse compression; then the range migration is eliminated through an RFT algorithm; and finally non-coherent accumulation is performed on the channel signals to judge whether a peak point exceeds the threshold or not. Computer simulation shows thataccumulation effect comparison is performed on the method and a method of carrying out RFT by a single-channel signal, the simulation result shows that the method can increase the accumulation gain byabout 1.7dB, the system performance can be improved, and the target detection signal-to-noise ratio can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of external radiation source radar positioning, and relates to a method for locating weak targets of external radiation sources based on multi-signal fusion. Background technique [0002] external radiation source radar ( figure 1 ), also known as passive radar, is a passive radar system that does not emit electromagnetic wave signals by itself, but uses existing radio, television, base station and other signals as illumination sources, and has anti-low-altitude penetration, strong survivability and anti-stealth It is one of the hotspots of domestic research at present. Existing external radiation source radar systems mostly use single-irradiation source signals, and the available signal power is limited, and the operating distance, positioning accuracy and detection performance are all limited. Therefore, expanding the number of radiation sources and increasing the available signal power to improve the de...

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): G01S13/56G01S7/41
CPCG01S7/415G01S7/418G01S13/006G01S13/56
Inventor 张花国刘莹谢进文尤少钦甘露马俊虎
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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
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