Heart rate monitors have been used to measure the heart rate during sports and other activity. They have also been used to measure serious medical conditions. Smart watches these days make it very easy to measure heart rate and almost all of them perform the measurement. However, they require contact with the skin or body. There have been many attempts that have been made with the use of technology to do remote measurement. One recent attempt is a novel publication by a group of authors who have used the WiFi signal that we normally use at home and is called Pulse-Fi. This was published in the conference proceedings of IEEE. https://ieeexplore.ieee.org/abstract/document/11096342 and here: https://inrg.engineering.ucsc.edu/2025/05/30/pulse-fi-a-low-cost-system-for-accurate-heart-rate-monitoring-using-wi-fi-channel-state-information/
Interestingly, someone used the idea and then created a “home” system that does the same thing.
It allows measurement of heart rate of a person who is sitting between the transmitter and receiver. It does work.
An interesting feature is that to analyze signals that are that complicated from a WiFi emitter would be very complicated, but the use of AI, through an LSTM model makes it possible.
Check the link on how it was done: https://www.youtube.com/watch?v=Cf6_PGuEiZY&t=6s
