SSA-VMD for UWB Radar Sensor Vital Sign Extraction

Area of Science:

• Electrical Engineering
• Biomedical Engineering
• Signal Processing

Background:

• Smart grids require continuous monitoring of employee health for operational safety.
• Ultra-wideband (UWB) radar offers non-contact vital sign monitoring due to its penetration and resolution capabilities.
• Accurate heart rate measurement is challenging due to low signal amplitude and noise.

Purpose of the Study:

• To develop a robust method for extracting vital signs (respiration and heartbeat) using UWB radar.
• To enhance the accuracy of heart rate monitoring in noisy environments for grid employees.
• To validate the effectiveness of the proposed signal processing techniques.

Main Methods:

• Utilizing ultra-wideband (UWB) radar sensors for non-invasive vital sign detection.
• Applying Singular Spectrum Analysis (SSA) to reconstruct noisy vital sign data and eliminate interference.
• Employing Variational Modal Decomposition (VMD) to accurately extract target vital signs.

Main Results:

• Demonstrated high accuracy in extracting vital sign information from ten subjects at varying distances.
• Successfully eliminated noise peaks around the heartbeat rate using SSA.
• Validated the combined SSA and VMD approach for precise vital sign extraction.

Conclusions:

• The proposed SSA and VMD method enables accurate vital sign monitoring using UWB radar.
• This technology is crucial for short-distance human detection and health monitoring in smart grid environments.
• Ensures the well-being of grid employees by providing reliable health status insights.