How Machine Learning is Making Independent Living Safer for the Elderly - IEEE Transmitter

The first three inputs are either too complex or not accurate enough, according to researchers from Nanjing University. Thus, they set out to refine a method for using a passive RFID tag hanging around the subject's neck to spot falls. In their study, they found that, focusing on Doppler frequency, "the value of a sudden fall was significantly higher than that of the other movements," enabling them to distinguish the falling action based on the change in speed.