A PPG-BASED PHYSIOLOGICAL SENSING SYSTEM WITH A SPATIO-TEMPORAL SAMPLING APPROACH TOWARDS IDENTIFYING AND REMOVING MOTION ARTIFACTS FROM OPTICAL SIGNALS

摘要

The invention pertains to fitness and/or sport performance by determination of physiological parameters, heart rate and breathing rate as indicators of physical exertion/intensity during exercise. In one embodiment, a PPG-based physiological sensing system employing spatiotemporal sampling towards identifying and removing motion artifacts received from a wearable optical sensing device in real-time and during various states of activity. The device capable of sensing and transmitting signals representative of physiological parameters to a remote electronic device. The device comprises an optical sensing unit with a light-emitting and light-detecting module for measuring blood volume changes caused by expansion and contraction of the small blood vessels in the skin and underlying tissue during the cardiac cycle. The spatial arrangement and temporal sampling configuration (sequence) allows for a common absorption point to be determined mathematically for each multi-channel sampling period, thereby obtaining an instantaneous optical measurement at different positions on the propagating pulse wave.