Body Movement Analysis During Sleep Based on Ultra-wideband Communication Channel Impulse Response Measurement

The study introduces an innovative non-invasive method using Ultra-Wideband (UWB) technology for monitoring body movements during sleep. Conducted at the Center for sleep and wake disorders, the research involved positioning UWB devices with two transmitters and receivers on either side of the bed, approximately 0.5 m from the patient. Ground truth measurements were done using a polysomnography (PSG) system. The analysis was conducted in 30-s epochs, involving 17 participants over 103.41 h. This method leverages UWB's Channel Impulse Response (CIR) to monitor body positions and movements, serving as an alternative to traditional radar-based approaches. The research highlights UWB's potential in understanding sleep patterns and quality, showing the interplay between body movements, sleep phases, and respiratory events. This study can contribute to sleep medicine by offering a new method for sleep disorder management, marking progress in non-invasive sleep monitoring technologies. The comparison with conventional polysomnography provides valuable insights into the efficacy of UWB technology in improving sleep monitoring.