Multi-Person 2-D Positioning Method Based on 77 GHz FMCW Radar.

Area of Science:

• Engineering
• Biomedical Engineering
• Signal Processing

Background:

• The global population is aging, increasing the need for advanced patient monitoring solutions.
• Non-contact monitoring technologies are essential for long-term healthcare and safety.

Purpose of the Study:

• To propose and validate a multi-person 2-D positioning method using 77 GHz FMCW radar.
• To enable reliable, non-contact tracking of individuals for healthcare applications.

Main Methods:

• Utilized 77 GHz Frequency Modulated Continuous Wave (FMCW) radar for data acquisition.
• Performed beam scanning to generate a distance-Doppler-angle data cube.
• Implemented a multi-channel respiratory spectrum superposition algorithm to filter interference.
• Applied a target center selection method for precise positioning.

Main Results:

• Successfully processed radar data to obtain a distance-Doppler-angle data cube.
• Effectively eliminated interfering targets using the developed algorithm.
• Accurately determined the distance and angle information of multiple targets.
• Experimental validation confirmed the method's capability for multi-person detection.

Conclusions:

• The proposed 77 GHz FMCW radar method enables accurate non-contact 2-D positioning of multiple individuals.
• This technology holds significant potential for long-term patient monitoring in an aging society.