Motion Cancellation Technique of Vital Signal Detectors Based on Continuous-Wave Radar Technology

Area of Science:

• Biomedical Engineering
• Radar Systems
• Signal Processing

Background:

• Continuous-wave (CW) radar sensors enable remote respiration and heartbeat monitoring via internal organ movement detection.
• External disturbances like random body motion (RBM) and environmental interference severely reduce signal-to-noise ratio (SNR) and vital sign detection accuracy.
• Existing motion cancellation methods involve radar architecture, signal processing, and electromagnetic propagation studies.

Purpose of the Study:

• To comprehensively review recent advancements in motion cancellation techniques for CW radar vital sign detectors.
• To identify and discuss future research directions for enhancing detection performance in dynamic environments.

Main Methods:

• Review of existing literature on motion cancellation techniques for CW radar systems.
• Analysis of radar architecture improvements, advanced signal processing algorithms, and electromagnetic propagation studies.
• Discussion of strategies to mitigate the impact of random body motion (RBM) and environmental interference.

Main Results:

• Identified various techniques enhancing CW radar robustness against RBMs.
• Highlighted the impact of RBM and interference on SNR and vital sign detection accuracy.
• Summarized progress in radar architecture, signal processing, and propagation studies for motion cancellation.

Conclusions:

• Motion cancellation is crucial for accurate CW radar vital sign detection in dynamic settings.
• Further research is needed to optimize techniques for improved performance.
• Future directions include developing more sophisticated algorithms and advanced radar designs.