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Through-Wall Multiple Targets Vital Signs Tracking Based on VMD Algorithm.

Jiaming Yan1, Hong Hong2, Heng Zhao3

  • 1School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China. jamlff2494@163.com.

Sensors (Basel, Switzerland)
|August 19, 2016
PubMed
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This summary is machine-generated.

This study introduces a new algorithm using Variational Mode Decomposition (VMD) to track multiple people's vital signs through walls using ultra-wideband (UWB) radar. The method successfully separates and monitors respiration signals even when targets are at the same distance.

Area of Science:

  • Radar Systems Engineering
  • Biomedical Signal Processing
  • Signal Decomposition Techniques

Background:

  • Single-input single-output (SISO) ultra-wideband (UWB) radar systems struggle with detecting multiple targets at the same distance.
  • Accurate tracking of vital signs through walls is crucial for applications like urban search and rescue.

Purpose of the Study:

  • To propose a novel algorithm for tracking multiple targets' vital signs through walls using SISO UWB radar.
  • To address the challenge of distinguishing and monitoring individuals located at the same distance.

Main Methods:

  • Development of a multiple targets vital signs tracking algorithm utilizing Variational Mode Decomposition (VMD).
  • Leveraging VMD's high-resolution decomposition to separate individual respiration signals from complex UWB radar data.
Keywords:
through-wall detectiontime-frequency analysisultra-wideband radarvariational mode decomposition

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  • Real-time tracking of time-varying vital signs for targets at identical distances.

    • Main Results:

    • Successful separation and tracking of constant, piecewise-constant, and time-varying vital signs for up to three targets.
    • Demonstrated effectiveness through evaluations with a 0.15 m thick concrete brick wall.
    • The VMD-based algorithm accurately tracked respiration signals of human targets at the same distance.

    Conclusions:

    • The proposed VMD-based algorithm significantly enhances the capability of SISO UWB radar for through-wall multiple vital signs tracking.
    • This method offers a superior solution for complex scenarios, including urban search and rescue missions.
    • The algorithm effectively overcomes the limitations of detecting targets at the same distance.