Multi-target vital sign detection method based on subspace method and DBF

A technology of vital signs and detection methods, applied in electromagnetic wave detection, measurement devices, radio wave measurement systems, etc., can solve problems such as poor imaging effect, low signal-to-noise ratio, and dependence on large array scales, and achieve efficiency and computing speed improvements Effect

Active Publication Date: 2021-09-07
SHANGHAI JIAO TONG UNIV
View PDF20 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the above-mentioned deficiencies existing in the prior art, and proposes a multi-target vital sign detection method based on the subspace method and DBF, and uses the subspace algorithm to get rid of the Existing digital beamforming is extremely susceptible to external signal interference, low signal-to-noise ratio, poor imaging effect, and relies on large-scale array defects. Sign detection

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 vital sign detection method based on subspace method and DBF
  • Multi-target vital sign detection method based on subspace method and DBF
  • Multi-target vital sign detection method based on subspace method and DBF

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Such as figure 1 As shown, it is a multi-target vital sign detection system based on subspace method and DBF involved in this embodiment, including: MIMO radar antenna transceiver unit, sawtooth wave signal generation unit, frequency multiplier, power amplification unit, baseband signal processing Unit, digital-to-analog conversion unit and back-end signal processing unit, wherein: the sawtooth wave generated by the sawtooth wave signal generator is transmitted through the MIMO radar antenna transceiver unit after being passed through the frequency multiplier and the power amplification unit; the emitted electromagnetic wave is reflected by the object and then transmitted by the MIMO Received by the radar antenna transceiver unit, the received signal is sequentially processed by the baseband signal processing unit for low noise amplification and frequency mixing to obtain an intermediate frequency signal, the digital-to-analog conversion unit sequentially filters the int...

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 relates to a multi-target vital sign detection method based on a subspace method and a DBF, and the method comprises the steps: carrying out the preliminary screening and positioning of a whole indoor three-dimensional space through employing the subspace method, and extracting a candidate target signal subspace; and performing digital beam forming and weighting on the angle in the candidate target signal subspace by using a DBF method, and further judging the specific accurate position information of the target through the amplitude. According to the method, a subspace algorithm is utilized, the defects that existing digital beam forming is extremely prone to being interfered by external signals, low in signal-to-noise ratio, poor in imaging effect and dependent on a large array scale are overcome, indoor high-precision multi-target life body positioning is achieved, and further vital sign detection is carried out on the target existing position.

Description

technical field [0001] The invention relates to a technology in the field of digital beamforming, in particular to a multi-target vital sign detection method using MIMO radar based on digital beamforming and a subspace method. Background technique [0002] Digital beamforming (Digital Beamforming, DBF) refers to the control of the amplitude and phase of the signal received by each antenna in the digital domain for the antenna array, so as to achieve the formation of lobes in a certain direction of the overall array. It is a common method for MIMO radar to distinguish multiple targets and multiple angles. However, when applied to indoor multi-target vital sign monitoring, the signal received by the radar not only includes the echo of the transmitted signal, but also various scattered echoes, stray echoes, spatial noise, and interference of the transmitted signal. signal and so on. Therefore, simply using the phase difference between receiving array units often cannot accura...

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): G01V3/12G01S13/88
CPCG01V3/12G01S13/88
Inventor 李予琛施尘玥叶炀涛吴可金晶顾昌展毛军发
Owner SHANGHAI JIAO TONG 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